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@@ -1,3077 +1,3108 b'' | |||
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1 | 1 | # -*- coding: utf-8 -*- |
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2 | 2 | """Main IPython class.""" |
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3 | 3 | |
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4 | 4 | #----------------------------------------------------------------------------- |
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5 | 5 | # Copyright (C) 2001 Janko Hauser <jhauser@zscout.de> |
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6 | 6 | # Copyright (C) 2001-2007 Fernando Perez. <fperez@colorado.edu> |
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7 | 7 | # Copyright (C) 2008-2011 The IPython Development Team |
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8 | 8 | # |
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9 | 9 | # Distributed under the terms of the BSD License. The full license is in |
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10 | 10 | # the file COPYING, distributed as part of this software. |
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11 | 11 | #----------------------------------------------------------------------------- |
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12 | 12 | |
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13 | 13 | #----------------------------------------------------------------------------- |
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14 | 14 | # Imports |
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15 | 15 | #----------------------------------------------------------------------------- |
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16 | 16 | |
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17 | 17 | from __future__ import absolute_import |
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18 | 18 | from __future__ import print_function |
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19 | 19 | |
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20 | 20 | import __builtin__ as builtin_mod |
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21 | 21 | import __future__ |
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22 | 22 | import abc |
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23 | 23 | import ast |
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24 | 24 | import atexit |
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25 | 25 | import os |
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26 | 26 | import re |
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27 | 27 | import runpy |
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28 | 28 | import sys |
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29 | 29 | import tempfile |
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30 | 30 | import types |
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31 | 31 | from io import open as io_open |
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32 | 32 | |
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33 | 33 | from IPython.config.configurable import SingletonConfigurable |
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34 | 34 | from IPython.core import debugger, oinspect |
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35 | 35 | from IPython.core import magic |
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36 | 36 | from IPython.core import page |
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37 | 37 | from IPython.core import prefilter |
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38 | 38 | from IPython.core import shadowns |
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39 | 39 | from IPython.core import ultratb |
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40 | 40 | from IPython.core.alias import AliasManager, AliasError |
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41 | 41 | from IPython.core.autocall import ExitAutocall |
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42 | 42 | from IPython.core.builtin_trap import BuiltinTrap |
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43 | 43 | from IPython.core.compilerop import CachingCompiler, check_linecache_ipython |
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44 | 44 | from IPython.core.display_trap import DisplayTrap |
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45 | 45 | from IPython.core.displayhook import DisplayHook |
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46 | 46 | from IPython.core.displaypub import DisplayPublisher |
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47 | 47 | from IPython.core.error import UsageError |
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48 | 48 | from IPython.core.extensions import ExtensionManager |
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49 | 49 | from IPython.core.fakemodule import FakeModule, init_fakemod_dict |
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50 | 50 | from IPython.core.formatters import DisplayFormatter |
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51 | 51 | from IPython.core.history import HistoryManager |
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52 | 52 | from IPython.core.inputsplitter import IPythonInputSplitter, ESC_MAGIC, ESC_MAGIC2 |
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53 | 53 | from IPython.core.logger import Logger |
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54 | 54 | from IPython.core.macro import Macro |
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55 | 55 | from IPython.core.payload import PayloadManager |
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56 | 56 | from IPython.core.prefilter import PrefilterManager |
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57 | 57 | from IPython.core.profiledir import ProfileDir |
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58 | 58 | from IPython.core.pylabtools import pylab_activate |
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59 | 59 | from IPython.core.prompts import PromptManager |
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60 | 60 | from IPython.lib.latextools import LaTeXTool |
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61 | 61 | from IPython.testing.skipdoctest import skip_doctest |
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62 | 62 | from IPython.utils import PyColorize |
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63 | 63 | from IPython.utils import io |
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64 | 64 | from IPython.utils import py3compat |
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65 | 65 | from IPython.utils import openpy |
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66 | 66 | from IPython.utils.decorators import undoc |
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67 | 67 | from IPython.utils.io import ask_yes_no |
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68 | 68 | from IPython.utils.ipstruct import Struct |
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69 | 69 | from IPython.utils.path import get_home_dir, get_ipython_dir, get_py_filename, unquote_filename |
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70 | 70 | from IPython.utils.pickleshare import PickleShareDB |
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71 | 71 | from IPython.utils.process import system, getoutput |
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72 | 72 | from IPython.utils.strdispatch import StrDispatch |
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73 | 73 | from IPython.utils.syspathcontext import prepended_to_syspath |
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74 | 74 | from IPython.utils.text import (format_screen, LSString, SList, |
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75 | 75 | DollarFormatter) |
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76 | 76 | from IPython.utils.traitlets import (Integer, CBool, CaselessStrEnum, Enum, |
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77 | 77 | List, Unicode, Instance, Type) |
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78 | 78 | from IPython.utils.warn import warn, error |
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79 | 79 | import IPython.core.hooks |
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80 | 80 | |
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81 | 81 | #----------------------------------------------------------------------------- |
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82 | 82 | # Globals |
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83 | 83 | #----------------------------------------------------------------------------- |
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84 | 84 | |
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85 | 85 | # compiled regexps for autoindent management |
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86 | 86 | dedent_re = re.compile(r'^\s+raise|^\s+return|^\s+pass') |
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87 | 87 | |
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88 | 88 | #----------------------------------------------------------------------------- |
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89 | 89 | # Utilities |
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90 | 90 | #----------------------------------------------------------------------------- |
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91 | 91 | |
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92 | 92 | @undoc |
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93 | 93 | def softspace(file, newvalue): |
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94 | 94 | """Copied from code.py, to remove the dependency""" |
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95 | 95 | |
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96 | 96 | oldvalue = 0 |
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97 | 97 | try: |
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98 | 98 | oldvalue = file.softspace |
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99 | 99 | except AttributeError: |
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100 | 100 | pass |
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101 | 101 | try: |
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102 | 102 | file.softspace = newvalue |
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103 | 103 | except (AttributeError, TypeError): |
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104 | 104 | # "attribute-less object" or "read-only attributes" |
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105 | 105 | pass |
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106 | 106 | return oldvalue |
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107 | 107 | |
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108 | 108 | @undoc |
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109 | 109 | def no_op(*a, **kw): pass |
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110 | 110 | |
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111 | 111 | @undoc |
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112 | 112 | class NoOpContext(object): |
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113 | 113 | def __enter__(self): pass |
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114 | 114 | def __exit__(self, type, value, traceback): pass |
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115 | 115 | no_op_context = NoOpContext() |
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116 | 116 | |
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117 | 117 | class SpaceInInput(Exception): pass |
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118 | 118 | |
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119 | 119 | @undoc |
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120 | 120 | class Bunch: pass |
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121 | 121 | |
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122 | 122 | |
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123 | 123 | def get_default_colors(): |
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124 | 124 | if sys.platform=='darwin': |
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125 | 125 | return "LightBG" |
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126 | 126 | elif os.name=='nt': |
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127 | 127 | return 'Linux' |
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128 | 128 | else: |
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129 | 129 | return 'Linux' |
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130 | 130 | |
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131 | 131 | |
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132 | 132 | class SeparateUnicode(Unicode): |
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133 | 133 | """A Unicode subclass to validate separate_in, separate_out, etc. |
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134 | 134 | |
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135 | 135 | This is a Unicode based trait that converts '0'->'' and '\\n'->'\n'. |
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136 | 136 | """ |
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137 | 137 | |
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138 | 138 | def validate(self, obj, value): |
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139 | 139 | if value == '0': value = '' |
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140 | 140 | value = value.replace('\\n','\n') |
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141 | 141 | return super(SeparateUnicode, self).validate(obj, value) |
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142 | 142 | |
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143 | 143 | |
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144 | 144 | class ReadlineNoRecord(object): |
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145 | 145 | """Context manager to execute some code, then reload readline history |
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146 | 146 | so that interactive input to the code doesn't appear when pressing up.""" |
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147 | 147 | def __init__(self, shell): |
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148 | 148 | self.shell = shell |
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149 | 149 | self._nested_level = 0 |
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150 | 150 | |
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151 | 151 | def __enter__(self): |
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152 | 152 | if self._nested_level == 0: |
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153 | 153 | try: |
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154 | 154 | self.orig_length = self.current_length() |
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155 | 155 | self.readline_tail = self.get_readline_tail() |
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156 | 156 | except (AttributeError, IndexError): # Can fail with pyreadline |
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157 | 157 | self.orig_length, self.readline_tail = 999999, [] |
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158 | 158 | self._nested_level += 1 |
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159 | 159 | |
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160 | 160 | def __exit__(self, type, value, traceback): |
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161 | 161 | self._nested_level -= 1 |
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162 | 162 | if self._nested_level == 0: |
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163 | 163 | # Try clipping the end if it's got longer |
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164 | 164 | try: |
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165 | 165 | e = self.current_length() - self.orig_length |
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166 | 166 | if e > 0: |
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167 | 167 | for _ in range(e): |
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168 | 168 | self.shell.readline.remove_history_item(self.orig_length) |
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169 | 169 | |
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170 | 170 | # If it still doesn't match, just reload readline history. |
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171 | 171 | if self.current_length() != self.orig_length \ |
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172 | 172 | or self.get_readline_tail() != self.readline_tail: |
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173 | 173 | self.shell.refill_readline_hist() |
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174 | 174 | except (AttributeError, IndexError): |
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175 | 175 | pass |
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176 | 176 | # Returning False will cause exceptions to propagate |
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177 | 177 | return False |
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178 | 178 | |
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179 | 179 | def current_length(self): |
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180 | 180 | return self.shell.readline.get_current_history_length() |
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181 | 181 | |
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182 | 182 | def get_readline_tail(self, n=10): |
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183 | 183 | """Get the last n items in readline history.""" |
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184 | 184 | end = self.shell.readline.get_current_history_length() + 1 |
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185 | 185 | start = max(end-n, 1) |
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186 | 186 | ghi = self.shell.readline.get_history_item |
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187 | 187 | return [ghi(x) for x in range(start, end)] |
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188 | 188 | |
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189 | 189 | #----------------------------------------------------------------------------- |
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190 | 190 | # Main IPython class |
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191 | 191 | #----------------------------------------------------------------------------- |
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192 | 192 | |
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193 | 193 | class InteractiveShell(SingletonConfigurable): |
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194 | 194 | """An enhanced, interactive shell for Python.""" |
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195 | 195 | |
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196 | 196 | _instance = None |
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197 | 197 | |
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198 | 198 | ast_transformers = List([], config=True, help= |
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199 | 199 | """ |
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200 | 200 | A list of ast.NodeTransformer subclass instances, which will be applied |
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201 | 201 | to user input before code is run. |
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202 | 202 | """ |
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203 | 203 | ) |
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204 | 204 | |
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205 | 205 | autocall = Enum((0,1,2), default_value=0, config=True, help= |
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206 | 206 | """ |
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207 | 207 | Make IPython automatically call any callable object even if you didn't |
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208 | 208 | type explicit parentheses. For example, 'str 43' becomes 'str(43)' |
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209 | 209 | automatically. The value can be '0' to disable the feature, '1' for |
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210 | 210 | 'smart' autocall, where it is not applied if there are no more |
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211 | 211 | arguments on the line, and '2' for 'full' autocall, where all callable |
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212 | 212 | objects are automatically called (even if no arguments are present). |
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213 | 213 | """ |
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214 | 214 | ) |
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215 | 215 | # TODO: remove all autoindent logic and put into frontends. |
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216 | 216 | # We can't do this yet because even runlines uses the autoindent. |
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217 | 217 | autoindent = CBool(True, config=True, help= |
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218 | 218 | """ |
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219 | 219 | Autoindent IPython code entered interactively. |
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220 | 220 | """ |
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221 | 221 | ) |
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222 | 222 | automagic = CBool(True, config=True, help= |
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223 | 223 | """ |
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224 | 224 | Enable magic commands to be called without the leading %. |
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225 | 225 | """ |
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226 | 226 | ) |
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227 | 227 | cache_size = Integer(1000, config=True, help= |
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228 | 228 | """ |
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229 | 229 | Set the size of the output cache. The default is 1000, you can |
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230 | 230 | change it permanently in your config file. Setting it to 0 completely |
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231 | 231 | disables the caching system, and the minimum value accepted is 20 (if |
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232 | 232 | you provide a value less than 20, it is reset to 0 and a warning is |
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233 | 233 | issued). This limit is defined because otherwise you'll spend more |
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234 | 234 | time re-flushing a too small cache than working |
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235 | 235 | """ |
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236 | 236 | ) |
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237 | 237 | color_info = CBool(True, config=True, help= |
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238 | 238 | """ |
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239 | 239 | Use colors for displaying information about objects. Because this |
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240 | 240 | information is passed through a pager (like 'less'), and some pagers |
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241 | 241 | get confused with color codes, this capability can be turned off. |
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242 | 242 | """ |
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243 | 243 | ) |
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244 | 244 | colors = CaselessStrEnum(('NoColor','LightBG','Linux'), |
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245 | 245 | default_value=get_default_colors(), config=True, |
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246 | 246 | help="Set the color scheme (NoColor, Linux, or LightBG)." |
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247 | 247 | ) |
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248 | 248 | colors_force = CBool(False, help= |
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249 | 249 | """ |
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250 | 250 | Force use of ANSI color codes, regardless of OS and readline |
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251 | 251 | availability. |
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252 | 252 | """ |
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253 | 253 | # FIXME: This is essentially a hack to allow ZMQShell to show colors |
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254 | 254 | # without readline on Win32. When the ZMQ formatting system is |
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255 | 255 | # refactored, this should be removed. |
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256 | 256 | ) |
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257 | 257 | debug = CBool(False, config=True) |
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258 | 258 | deep_reload = CBool(False, config=True, help= |
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259 | 259 | """ |
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260 | 260 | Enable deep (recursive) reloading by default. IPython can use the |
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261 | 261 | deep_reload module which reloads changes in modules recursively (it |
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262 | 262 | replaces the reload() function, so you don't need to change anything to |
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263 | 263 | use it). deep_reload() forces a full reload of modules whose code may |
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264 | 264 | have changed, which the default reload() function does not. When |
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265 | 265 | deep_reload is off, IPython will use the normal reload(), but |
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266 | 266 | deep_reload will still be available as dreload(). |
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267 | 267 | """ |
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268 | 268 | ) |
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269 | 269 | disable_failing_post_execute = CBool(False, config=True, |
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270 | 270 | help="Don't call post-execute functions that have failed in the past." |
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271 | 271 | ) |
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272 | 272 | display_formatter = Instance(DisplayFormatter) |
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273 | 273 | displayhook_class = Type(DisplayHook) |
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274 | 274 | display_pub_class = Type(DisplayPublisher) |
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275 | 275 | data_pub_class = None |
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276 | 276 | |
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277 | 277 | exit_now = CBool(False) |
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278 | 278 | exiter = Instance(ExitAutocall) |
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279 | 279 | def _exiter_default(self): |
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280 | 280 | return ExitAutocall(self) |
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281 | 281 | # Monotonically increasing execution counter |
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282 | 282 | execution_count = Integer(1) |
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283 | 283 | filename = Unicode("<ipython console>") |
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284 | 284 | ipython_dir= Unicode('', config=True) # Set to get_ipython_dir() in __init__ |
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285 | 285 | |
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286 | 286 | # Input splitter, to transform input line by line and detect when a block |
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287 | 287 | # is ready to be executed. |
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288 | 288 | input_splitter = Instance('IPython.core.inputsplitter.IPythonInputSplitter', |
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289 | 289 | (), {'line_input_checker': True}) |
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290 | 290 | |
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291 | 291 | # This InputSplitter instance is used to transform completed cells before |
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292 | 292 | # running them. It allows cell magics to contain blank lines. |
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293 | 293 | input_transformer_manager = Instance('IPython.core.inputsplitter.IPythonInputSplitter', |
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294 | 294 | (), {'line_input_checker': False}) |
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295 | 295 | |
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296 | 296 | logstart = CBool(False, config=True, help= |
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297 | 297 | """ |
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298 | 298 | Start logging to the default log file. |
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299 | 299 | """ |
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300 | 300 | ) |
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301 | 301 | logfile = Unicode('', config=True, help= |
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302 | 302 | """ |
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303 | 303 | The name of the logfile to use. |
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304 | 304 | """ |
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305 | 305 | ) |
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306 | 306 | logappend = Unicode('', config=True, help= |
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307 | 307 | """ |
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308 | 308 | Start logging to the given file in append mode. |
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309 | 309 | """ |
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310 | 310 | ) |
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311 | 311 | object_info_string_level = Enum((0,1,2), default_value=0, |
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312 | 312 | config=True) |
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313 | 313 | pdb = CBool(False, config=True, help= |
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314 | 314 | """ |
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315 | 315 | Automatically call the pdb debugger after every exception. |
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316 | 316 | """ |
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317 | 317 | ) |
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318 | 318 | multiline_history = CBool(sys.platform != 'win32', config=True, |
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319 | 319 | help="Save multi-line entries as one entry in readline history" |
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320 | 320 | ) |
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321 | 321 | |
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322 | 322 | # deprecated prompt traits: |
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323 | 323 | |
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324 | 324 | prompt_in1 = Unicode('In [\\#]: ', config=True, |
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325 | 325 | help="Deprecated, use PromptManager.in_template") |
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326 | 326 | prompt_in2 = Unicode(' .\\D.: ', config=True, |
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327 | 327 | help="Deprecated, use PromptManager.in2_template") |
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328 | 328 | prompt_out = Unicode('Out[\\#]: ', config=True, |
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329 | 329 | help="Deprecated, use PromptManager.out_template") |
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330 | 330 | prompts_pad_left = CBool(True, config=True, |
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331 | 331 | help="Deprecated, use PromptManager.justify") |
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332 | 332 | |
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333 | 333 | def _prompt_trait_changed(self, name, old, new): |
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334 | 334 | table = { |
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335 | 335 | 'prompt_in1' : 'in_template', |
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336 | 336 | 'prompt_in2' : 'in2_template', |
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337 | 337 | 'prompt_out' : 'out_template', |
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338 | 338 | 'prompts_pad_left' : 'justify', |
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339 | 339 | } |
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340 | 340 | warn("InteractiveShell.{name} is deprecated, use PromptManager.{newname}".format( |
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341 | 341 | name=name, newname=table[name]) |
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342 | 342 | ) |
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343 | 343 | # protect against weird cases where self.config may not exist: |
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344 | 344 | if self.config is not None: |
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345 | 345 | # propagate to corresponding PromptManager trait |
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346 | 346 | setattr(self.config.PromptManager, table[name], new) |
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347 | 347 | |
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348 | 348 | _prompt_in1_changed = _prompt_trait_changed |
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349 | 349 | _prompt_in2_changed = _prompt_trait_changed |
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350 | 350 | _prompt_out_changed = _prompt_trait_changed |
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351 | 351 | _prompt_pad_left_changed = _prompt_trait_changed |
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352 | 352 | |
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353 | 353 | show_rewritten_input = CBool(True, config=True, |
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354 | 354 | help="Show rewritten input, e.g. for autocall." |
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355 | 355 | ) |
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356 | 356 | |
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357 | 357 | quiet = CBool(False, config=True) |
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358 | 358 | |
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359 | 359 | history_length = Integer(10000, config=True) |
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360 | 360 | |
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361 | 361 | # The readline stuff will eventually be moved to the terminal subclass |
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362 | 362 | # but for now, we can't do that as readline is welded in everywhere. |
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363 | 363 | readline_use = CBool(True, config=True) |
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364 | 364 | readline_remove_delims = Unicode('-/~', config=True) |
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365 | 365 | readline_delims = Unicode() # set by init_readline() |
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366 | 366 | # don't use \M- bindings by default, because they |
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367 | 367 | # conflict with 8-bit encodings. See gh-58,gh-88 |
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368 | 368 | readline_parse_and_bind = List([ |
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369 | 369 | 'tab: complete', |
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370 | 370 | '"\C-l": clear-screen', |
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371 | 371 | 'set show-all-if-ambiguous on', |
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372 | 372 | '"\C-o": tab-insert', |
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373 | 373 | '"\C-r": reverse-search-history', |
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374 | 374 | '"\C-s": forward-search-history', |
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375 | 375 | '"\C-p": history-search-backward', |
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376 | 376 | '"\C-n": history-search-forward', |
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377 | 377 | '"\e[A": history-search-backward', |
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378 | 378 | '"\e[B": history-search-forward', |
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379 | 379 | '"\C-k": kill-line', |
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380 | 380 | '"\C-u": unix-line-discard', |
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381 | 381 | ], allow_none=False, config=True) |
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382 | 382 | |
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383 | 383 | ast_node_interactivity = Enum(['all', 'last', 'last_expr', 'none'], |
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384 | 384 | default_value='last_expr', config=True, |
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385 | 385 | help=""" |
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386 | 386 | 'all', 'last', 'last_expr' or 'none', specifying which nodes should be |
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387 | 387 | run interactively (displaying output from expressions).""") |
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388 | 388 | |
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389 | 389 | # TODO: this part of prompt management should be moved to the frontends. |
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390 | 390 | # Use custom TraitTypes that convert '0'->'' and '\\n'->'\n' |
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391 | 391 | separate_in = SeparateUnicode('\n', config=True) |
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392 | 392 | separate_out = SeparateUnicode('', config=True) |
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393 | 393 | separate_out2 = SeparateUnicode('', config=True) |
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394 | 394 | wildcards_case_sensitive = CBool(True, config=True) |
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395 | 395 | xmode = CaselessStrEnum(('Context','Plain', 'Verbose'), |
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396 | 396 | default_value='Context', config=True) |
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397 | 397 | |
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398 | 398 | # Subcomponents of InteractiveShell |
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399 | 399 | alias_manager = Instance('IPython.core.alias.AliasManager') |
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400 | 400 | prefilter_manager = Instance('IPython.core.prefilter.PrefilterManager') |
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401 | 401 | builtin_trap = Instance('IPython.core.builtin_trap.BuiltinTrap') |
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402 | 402 | display_trap = Instance('IPython.core.display_trap.DisplayTrap') |
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403 | 403 | extension_manager = Instance('IPython.core.extensions.ExtensionManager') |
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404 | 404 | payload_manager = Instance('IPython.core.payload.PayloadManager') |
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405 | 405 | history_manager = Instance('IPython.core.history.HistoryManager') |
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406 | 406 | magics_manager = Instance('IPython.core.magic.MagicsManager') |
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407 | 407 | |
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408 | 408 | profile_dir = Instance('IPython.core.application.ProfileDir') |
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409 | 409 | @property |
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410 | 410 | def profile(self): |
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411 | 411 | if self.profile_dir is not None: |
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412 | 412 | name = os.path.basename(self.profile_dir.location) |
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413 | 413 | return name.replace('profile_','') |
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414 | 414 | |
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415 | 415 | |
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416 | 416 | # Private interface |
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417 | 417 | _post_execute = Instance(dict) |
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418 | 418 | |
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419 | 419 | # Tracks any GUI loop loaded for pylab |
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420 | 420 | pylab_gui_select = None |
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421 | 421 | |
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422 | 422 | def __init__(self, config=None, ipython_dir=None, profile_dir=None, |
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423 | 423 | user_module=None, user_ns=None, |
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424 | 424 | custom_exceptions=((), None), **kwargs): |
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425 | 425 | |
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426 | 426 | # This is where traits with a config_key argument are updated |
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427 | 427 | # from the values on config. |
|
428 | 428 | super(InteractiveShell, self).__init__(config=config, **kwargs) |
|
429 | 429 | self.configurables = [self] |
|
430 | 430 | |
|
431 | 431 | # These are relatively independent and stateless |
|
432 | 432 | self.init_ipython_dir(ipython_dir) |
|
433 | 433 | self.init_profile_dir(profile_dir) |
|
434 | 434 | self.init_instance_attrs() |
|
435 | 435 | self.init_environment() |
|
436 | 436 | |
|
437 | 437 | # Check if we're in a virtualenv, and set up sys.path. |
|
438 | 438 | self.init_virtualenv() |
|
439 | 439 | |
|
440 | 440 | # Create namespaces (user_ns, user_global_ns, etc.) |
|
441 | 441 | self.init_create_namespaces(user_module, user_ns) |
|
442 | 442 | # This has to be done after init_create_namespaces because it uses |
|
443 | 443 | # something in self.user_ns, but before init_sys_modules, which |
|
444 | 444 | # is the first thing to modify sys. |
|
445 | 445 | # TODO: When we override sys.stdout and sys.stderr before this class |
|
446 | 446 | # is created, we are saving the overridden ones here. Not sure if this |
|
447 | 447 | # is what we want to do. |
|
448 | 448 | self.save_sys_module_state() |
|
449 | 449 | self.init_sys_modules() |
|
450 | 450 | |
|
451 | 451 | # While we're trying to have each part of the code directly access what |
|
452 | 452 | # it needs without keeping redundant references to objects, we have too |
|
453 | 453 | # much legacy code that expects ip.db to exist. |
|
454 | 454 | self.db = PickleShareDB(os.path.join(self.profile_dir.location, 'db')) |
|
455 | 455 | |
|
456 | 456 | self.init_history() |
|
457 | 457 | self.init_encoding() |
|
458 | 458 | self.init_prefilter() |
|
459 | 459 | |
|
460 | 460 | self.init_syntax_highlighting() |
|
461 | 461 | self.init_hooks() |
|
462 | 462 | self.init_pushd_popd_magic() |
|
463 | 463 | # self.init_traceback_handlers use to be here, but we moved it below |
|
464 | 464 | # because it and init_io have to come after init_readline. |
|
465 | 465 | self.init_user_ns() |
|
466 | 466 | self.init_logger() |
|
467 | 467 | self.init_alias() |
|
468 | 468 | self.init_builtins() |
|
469 | 469 | |
|
470 | 470 | # The following was in post_config_initialization |
|
471 | 471 | self.init_inspector() |
|
472 | 472 | # init_readline() must come before init_io(), because init_io uses |
|
473 | 473 | # readline related things. |
|
474 | 474 | self.init_readline() |
|
475 | 475 | # We save this here in case user code replaces raw_input, but it needs |
|
476 | 476 | # to be after init_readline(), because PyPy's readline works by replacing |
|
477 | 477 | # raw_input. |
|
478 | 478 | if py3compat.PY3: |
|
479 | 479 | self.raw_input_original = input |
|
480 | 480 | else: |
|
481 | 481 | self.raw_input_original = raw_input |
|
482 | 482 | # init_completer must come after init_readline, because it needs to |
|
483 | 483 | # know whether readline is present or not system-wide to configure the |
|
484 | 484 | # completers, since the completion machinery can now operate |
|
485 | 485 | # independently of readline (e.g. over the network) |
|
486 | 486 | self.init_completer() |
|
487 | 487 | # TODO: init_io() needs to happen before init_traceback handlers |
|
488 | 488 | # because the traceback handlers hardcode the stdout/stderr streams. |
|
489 | 489 | # This logic in in debugger.Pdb and should eventually be changed. |
|
490 | 490 | self.init_io() |
|
491 | 491 | self.init_traceback_handlers(custom_exceptions) |
|
492 | 492 | self.init_prompts() |
|
493 | 493 | self.init_display_formatter() |
|
494 | 494 | self.init_display_pub() |
|
495 | 495 | self.init_data_pub() |
|
496 | 496 | self.init_displayhook() |
|
497 | 497 | self.init_latextool() |
|
498 | 498 | self.init_magics() |
|
499 | 499 | self.init_logstart() |
|
500 | 500 | self.init_pdb() |
|
501 | 501 | self.init_extension_manager() |
|
502 | 502 | self.init_payload() |
|
503 | 503 | self.hooks.late_startup_hook() |
|
504 | 504 | atexit.register(self.atexit_operations) |
|
505 | 505 | |
|
506 | 506 | def get_ipython(self): |
|
507 | 507 | """Return the currently running IPython instance.""" |
|
508 | 508 | return self |
|
509 | 509 | |
|
510 | 510 | #------------------------------------------------------------------------- |
|
511 | 511 | # Trait changed handlers |
|
512 | 512 | #------------------------------------------------------------------------- |
|
513 | 513 | |
|
514 | 514 | def _ipython_dir_changed(self, name, new): |
|
515 | 515 | if not os.path.isdir(new): |
|
516 | 516 | os.makedirs(new, mode = 0o777) |
|
517 | 517 | |
|
518 | 518 | def set_autoindent(self,value=None): |
|
519 | 519 | """Set the autoindent flag, checking for readline support. |
|
520 | 520 | |
|
521 | 521 | If called with no arguments, it acts as a toggle.""" |
|
522 | 522 | |
|
523 | 523 | if value != 0 and not self.has_readline: |
|
524 | 524 | if os.name == 'posix': |
|
525 | 525 | warn("The auto-indent feature requires the readline library") |
|
526 | 526 | self.autoindent = 0 |
|
527 | 527 | return |
|
528 | 528 | if value is None: |
|
529 | 529 | self.autoindent = not self.autoindent |
|
530 | 530 | else: |
|
531 | 531 | self.autoindent = value |
|
532 | 532 | |
|
533 | 533 | #------------------------------------------------------------------------- |
|
534 | 534 | # init_* methods called by __init__ |
|
535 | 535 | #------------------------------------------------------------------------- |
|
536 | 536 | |
|
537 | 537 | def init_ipython_dir(self, ipython_dir): |
|
538 | 538 | if ipython_dir is not None: |
|
539 | 539 | self.ipython_dir = ipython_dir |
|
540 | 540 | return |
|
541 | 541 | |
|
542 | 542 | self.ipython_dir = get_ipython_dir() |
|
543 | 543 | |
|
544 | 544 | def init_profile_dir(self, profile_dir): |
|
545 | 545 | if profile_dir is not None: |
|
546 | 546 | self.profile_dir = profile_dir |
|
547 | 547 | return |
|
548 | 548 | self.profile_dir =\ |
|
549 | 549 | ProfileDir.create_profile_dir_by_name(self.ipython_dir, 'default') |
|
550 | 550 | |
|
551 | 551 | def init_instance_attrs(self): |
|
552 | 552 | self.more = False |
|
553 | 553 | |
|
554 | 554 | # command compiler |
|
555 | 555 | self.compile = CachingCompiler() |
|
556 | 556 | |
|
557 | 557 | # Make an empty namespace, which extension writers can rely on both |
|
558 | 558 | # existing and NEVER being used by ipython itself. This gives them a |
|
559 | 559 | # convenient location for storing additional information and state |
|
560 | 560 | # their extensions may require, without fear of collisions with other |
|
561 | 561 | # ipython names that may develop later. |
|
562 | 562 | self.meta = Struct() |
|
563 | 563 | |
|
564 | 564 | # Temporary files used for various purposes. Deleted at exit. |
|
565 | 565 | self.tempfiles = [] |
|
566 | 566 | |
|
567 | 567 | # Keep track of readline usage (later set by init_readline) |
|
568 | 568 | self.has_readline = False |
|
569 | 569 | |
|
570 | 570 | # keep track of where we started running (mainly for crash post-mortem) |
|
571 | 571 | # This is not being used anywhere currently. |
|
572 | 572 | self.starting_dir = os.getcwdu() |
|
573 | 573 | |
|
574 | 574 | # Indentation management |
|
575 | 575 | self.indent_current_nsp = 0 |
|
576 | 576 | |
|
577 | 577 | # Dict to track post-execution functions that have been registered |
|
578 | 578 | self._post_execute = {} |
|
579 | 579 | |
|
580 | 580 | def init_environment(self): |
|
581 | 581 | """Any changes we need to make to the user's environment.""" |
|
582 | 582 | pass |
|
583 | 583 | |
|
584 | 584 | def init_encoding(self): |
|
585 | 585 | # Get system encoding at startup time. Certain terminals (like Emacs |
|
586 | 586 | # under Win32 have it set to None, and we need to have a known valid |
|
587 | 587 | # encoding to use in the raw_input() method |
|
588 | 588 | try: |
|
589 | 589 | self.stdin_encoding = sys.stdin.encoding or 'ascii' |
|
590 | 590 | except AttributeError: |
|
591 | 591 | self.stdin_encoding = 'ascii' |
|
592 | 592 | |
|
593 | 593 | def init_syntax_highlighting(self): |
|
594 | 594 | # Python source parser/formatter for syntax highlighting |
|
595 | 595 | pyformat = PyColorize.Parser().format |
|
596 | 596 | self.pycolorize = lambda src: pyformat(src,'str',self.colors) |
|
597 | 597 | |
|
598 | 598 | def init_pushd_popd_magic(self): |
|
599 | 599 | # for pushd/popd management |
|
600 | 600 | self.home_dir = get_home_dir() |
|
601 | 601 | |
|
602 | 602 | self.dir_stack = [] |
|
603 | 603 | |
|
604 | 604 | def init_logger(self): |
|
605 | 605 | self.logger = Logger(self.home_dir, logfname='ipython_log.py', |
|
606 | 606 | logmode='rotate') |
|
607 | 607 | |
|
608 | 608 | def init_logstart(self): |
|
609 | 609 | """Initialize logging in case it was requested at the command line. |
|
610 | 610 | """ |
|
611 | 611 | if self.logappend: |
|
612 | 612 | self.magic('logstart %s append' % self.logappend) |
|
613 | 613 | elif self.logfile: |
|
614 | 614 | self.magic('logstart %s' % self.logfile) |
|
615 | 615 | elif self.logstart: |
|
616 | 616 | self.magic('logstart') |
|
617 | 617 | |
|
618 | 618 | def init_builtins(self): |
|
619 | 619 | # A single, static flag that we set to True. Its presence indicates |
|
620 | 620 | # that an IPython shell has been created, and we make no attempts at |
|
621 | 621 | # removing on exit or representing the existence of more than one |
|
622 | 622 | # IPython at a time. |
|
623 | 623 | builtin_mod.__dict__['__IPYTHON__'] = True |
|
624 | 624 | |
|
625 | 625 | # In 0.11 we introduced '__IPYTHON__active' as an integer we'd try to |
|
626 | 626 | # manage on enter/exit, but with all our shells it's virtually |
|
627 | 627 | # impossible to get all the cases right. We're leaving the name in for |
|
628 | 628 | # those who adapted their codes to check for this flag, but will |
|
629 | 629 | # eventually remove it after a few more releases. |
|
630 | 630 | builtin_mod.__dict__['__IPYTHON__active'] = \ |
|
631 | 631 | 'Deprecated, check for __IPYTHON__' |
|
632 | 632 | |
|
633 | 633 | self.builtin_trap = BuiltinTrap(shell=self) |
|
634 | 634 | |
|
635 | 635 | def init_inspector(self): |
|
636 | 636 | # Object inspector |
|
637 | 637 | self.inspector = oinspect.Inspector(oinspect.InspectColors, |
|
638 | 638 | PyColorize.ANSICodeColors, |
|
639 | 639 | 'NoColor', |
|
640 | 640 | self.object_info_string_level) |
|
641 | 641 | |
|
642 | 642 | def init_io(self): |
|
643 | 643 | # This will just use sys.stdout and sys.stderr. If you want to |
|
644 | 644 | # override sys.stdout and sys.stderr themselves, you need to do that |
|
645 | 645 | # *before* instantiating this class, because io holds onto |
|
646 | 646 | # references to the underlying streams. |
|
647 | 647 | if (sys.platform == 'win32' or sys.platform == 'cli') and self.has_readline: |
|
648 | 648 | io.stdout = io.stderr = io.IOStream(self.readline._outputfile) |
|
649 | 649 | else: |
|
650 | 650 | io.stdout = io.IOStream(sys.stdout) |
|
651 | 651 | io.stderr = io.IOStream(sys.stderr) |
|
652 | 652 | |
|
653 | 653 | def init_prompts(self): |
|
654 | 654 | self.prompt_manager = PromptManager(shell=self, config=self.config) |
|
655 | 655 | self.configurables.append(self.prompt_manager) |
|
656 | 656 | # Set system prompts, so that scripts can decide if they are running |
|
657 | 657 | # interactively. |
|
658 | 658 | sys.ps1 = 'In : ' |
|
659 | 659 | sys.ps2 = '...: ' |
|
660 | 660 | sys.ps3 = 'Out: ' |
|
661 | 661 | |
|
662 | 662 | def init_display_formatter(self): |
|
663 | 663 | self.display_formatter = DisplayFormatter(config=self.config) |
|
664 | 664 | self.configurables.append(self.display_formatter) |
|
665 | 665 | |
|
666 | 666 | def init_display_pub(self): |
|
667 | 667 | self.display_pub = self.display_pub_class(config=self.config) |
|
668 | 668 | self.configurables.append(self.display_pub) |
|
669 | 669 | |
|
670 | 670 | def init_data_pub(self): |
|
671 | 671 | if not self.data_pub_class: |
|
672 | 672 | self.data_pub = None |
|
673 | 673 | return |
|
674 | 674 | self.data_pub = self.data_pub_class(config=self.config) |
|
675 | 675 | self.configurables.append(self.data_pub) |
|
676 | 676 | |
|
677 | 677 | def init_displayhook(self): |
|
678 | 678 | # Initialize displayhook, set in/out prompts and printing system |
|
679 | 679 | self.displayhook = self.displayhook_class( |
|
680 | 680 | config=self.config, |
|
681 | 681 | shell=self, |
|
682 | 682 | cache_size=self.cache_size, |
|
683 | 683 | ) |
|
684 | 684 | self.configurables.append(self.displayhook) |
|
685 | 685 | # This is a context manager that installs/revmoes the displayhook at |
|
686 | 686 | # the appropriate time. |
|
687 | 687 | self.display_trap = DisplayTrap(hook=self.displayhook) |
|
688 | 688 | |
|
689 | 689 | def init_latextool(self): |
|
690 | 690 | """Configure LaTeXTool.""" |
|
691 | 691 | cfg = LaTeXTool.instance(config=self.config) |
|
692 | 692 | if cfg not in self.configurables: |
|
693 | 693 | self.configurables.append(cfg) |
|
694 | 694 | |
|
695 | 695 | def init_virtualenv(self): |
|
696 | 696 | """Add a virtualenv to sys.path so the user can import modules from it. |
|
697 | 697 | This isn't perfect: it doesn't use the Python interpreter with which the |
|
698 | 698 | virtualenv was built, and it ignores the --no-site-packages option. A |
|
699 | 699 | warning will appear suggesting the user installs IPython in the |
|
700 | 700 | virtualenv, but for many cases, it probably works well enough. |
|
701 | 701 | |
|
702 | 702 | Adapted from code snippets online. |
|
703 | 703 | |
|
704 | 704 | http://blog.ufsoft.org/2009/1/29/ipython-and-virtualenv |
|
705 | 705 | """ |
|
706 | 706 | if 'VIRTUAL_ENV' not in os.environ: |
|
707 | 707 | # Not in a virtualenv |
|
708 | 708 | return |
|
709 | 709 | |
|
710 | 710 | if sys.executable.startswith(os.environ['VIRTUAL_ENV']): |
|
711 | 711 | # Running properly in the virtualenv, don't need to do anything |
|
712 | 712 | return |
|
713 | 713 | |
|
714 | 714 | warn("Attempting to work in a virtualenv. If you encounter problems, please " |
|
715 | 715 | "install IPython inside the virtualenv.") |
|
716 | 716 | if sys.platform == "win32": |
|
717 | 717 | virtual_env = os.path.join(os.environ['VIRTUAL_ENV'], 'Lib', 'site-packages') |
|
718 | 718 | else: |
|
719 | 719 | virtual_env = os.path.join(os.environ['VIRTUAL_ENV'], 'lib', |
|
720 | 720 | 'python%d.%d' % sys.version_info[:2], 'site-packages') |
|
721 | 721 | |
|
722 | 722 | import site |
|
723 | 723 | sys.path.insert(0, virtual_env) |
|
724 | 724 | site.addsitedir(virtual_env) |
|
725 | 725 | |
|
726 | 726 | #------------------------------------------------------------------------- |
|
727 | 727 | # Things related to injections into the sys module |
|
728 | 728 | #------------------------------------------------------------------------- |
|
729 | 729 | |
|
730 | 730 | def save_sys_module_state(self): |
|
731 | 731 | """Save the state of hooks in the sys module. |
|
732 | 732 | |
|
733 | 733 | This has to be called after self.user_module is created. |
|
734 | 734 | """ |
|
735 | 735 | self._orig_sys_module_state = {} |
|
736 | 736 | self._orig_sys_module_state['stdin'] = sys.stdin |
|
737 | 737 | self._orig_sys_module_state['stdout'] = sys.stdout |
|
738 | 738 | self._orig_sys_module_state['stderr'] = sys.stderr |
|
739 | 739 | self._orig_sys_module_state['excepthook'] = sys.excepthook |
|
740 | 740 | self._orig_sys_modules_main_name = self.user_module.__name__ |
|
741 | 741 | self._orig_sys_modules_main_mod = sys.modules.get(self.user_module.__name__) |
|
742 | 742 | |
|
743 | 743 | def restore_sys_module_state(self): |
|
744 | 744 | """Restore the state of the sys module.""" |
|
745 | 745 | try: |
|
746 | 746 | for k, v in self._orig_sys_module_state.iteritems(): |
|
747 | 747 | setattr(sys, k, v) |
|
748 | 748 | except AttributeError: |
|
749 | 749 | pass |
|
750 | 750 | # Reset what what done in self.init_sys_modules |
|
751 | 751 | if self._orig_sys_modules_main_mod is not None: |
|
752 | 752 | sys.modules[self._orig_sys_modules_main_name] = self._orig_sys_modules_main_mod |
|
753 | 753 | |
|
754 | 754 | #------------------------------------------------------------------------- |
|
755 | 755 | # Things related to hooks |
|
756 | 756 | #------------------------------------------------------------------------- |
|
757 | 757 | |
|
758 | 758 | def init_hooks(self): |
|
759 | 759 | # hooks holds pointers used for user-side customizations |
|
760 | 760 | self.hooks = Struct() |
|
761 | 761 | |
|
762 | 762 | self.strdispatchers = {} |
|
763 | 763 | |
|
764 | 764 | # Set all default hooks, defined in the IPython.hooks module. |
|
765 | 765 | hooks = IPython.core.hooks |
|
766 | 766 | for hook_name in hooks.__all__: |
|
767 | 767 | # default hooks have priority 100, i.e. low; user hooks should have |
|
768 | 768 | # 0-100 priority |
|
769 | 769 | self.set_hook(hook_name,getattr(hooks,hook_name), 100) |
|
770 | 770 | |
|
771 | 771 | def set_hook(self,name,hook, priority = 50, str_key = None, re_key = None): |
|
772 | 772 | """set_hook(name,hook) -> sets an internal IPython hook. |
|
773 | 773 | |
|
774 | 774 | IPython exposes some of its internal API as user-modifiable hooks. By |
|
775 | 775 | adding your function to one of these hooks, you can modify IPython's |
|
776 | 776 | behavior to call at runtime your own routines.""" |
|
777 | 777 | |
|
778 | 778 | # At some point in the future, this should validate the hook before it |
|
779 | 779 | # accepts it. Probably at least check that the hook takes the number |
|
780 | 780 | # of args it's supposed to. |
|
781 | 781 | |
|
782 | 782 | f = types.MethodType(hook,self) |
|
783 | 783 | |
|
784 | 784 | # check if the hook is for strdispatcher first |
|
785 | 785 | if str_key is not None: |
|
786 | 786 | sdp = self.strdispatchers.get(name, StrDispatch()) |
|
787 | 787 | sdp.add_s(str_key, f, priority ) |
|
788 | 788 | self.strdispatchers[name] = sdp |
|
789 | 789 | return |
|
790 | 790 | if re_key is not None: |
|
791 | 791 | sdp = self.strdispatchers.get(name, StrDispatch()) |
|
792 | 792 | sdp.add_re(re.compile(re_key), f, priority ) |
|
793 | 793 | self.strdispatchers[name] = sdp |
|
794 | 794 | return |
|
795 | 795 | |
|
796 | 796 | dp = getattr(self.hooks, name, None) |
|
797 | 797 | if name not in IPython.core.hooks.__all__: |
|
798 | 798 | print("Warning! Hook '%s' is not one of %s" % \ |
|
799 | 799 | (name, IPython.core.hooks.__all__ )) |
|
800 | 800 | if not dp: |
|
801 | 801 | dp = IPython.core.hooks.CommandChainDispatcher() |
|
802 | 802 | |
|
803 | 803 | try: |
|
804 | 804 | dp.add(f,priority) |
|
805 | 805 | except AttributeError: |
|
806 | 806 | # it was not commandchain, plain old func - replace |
|
807 | 807 | dp = f |
|
808 | 808 | |
|
809 | 809 | setattr(self.hooks,name, dp) |
|
810 | 810 | |
|
811 | 811 | def register_post_execute(self, func): |
|
812 | 812 | """Register a function for calling after code execution. |
|
813 | 813 | """ |
|
814 | 814 | if not callable(func): |
|
815 | 815 | raise ValueError('argument %s must be callable' % func) |
|
816 | 816 | self._post_execute[func] = True |
|
817 | 817 | |
|
818 | 818 | #------------------------------------------------------------------------- |
|
819 | 819 | # Things related to the "main" module |
|
820 | 820 | #------------------------------------------------------------------------- |
|
821 | 821 | |
|
822 | 822 | def new_main_mod(self,ns=None): |
|
823 | 823 | """Return a new 'main' module object for user code execution. |
|
824 | 824 | """ |
|
825 | 825 | main_mod = self._user_main_module |
|
826 | 826 | init_fakemod_dict(main_mod,ns) |
|
827 | 827 | return main_mod |
|
828 | 828 | |
|
829 | 829 | def cache_main_mod(self,ns,fname): |
|
830 | 830 | """Cache a main module's namespace. |
|
831 | 831 | |
|
832 | 832 | When scripts are executed via %run, we must keep a reference to the |
|
833 | 833 | namespace of their __main__ module (a FakeModule instance) around so |
|
834 | 834 | that Python doesn't clear it, rendering objects defined therein |
|
835 | 835 | useless. |
|
836 | 836 | |
|
837 | 837 | This method keeps said reference in a private dict, keyed by the |
|
838 | 838 | absolute path of the module object (which corresponds to the script |
|
839 | 839 | path). This way, for multiple executions of the same script we only |
|
840 | 840 | keep one copy of the namespace (the last one), thus preventing memory |
|
841 | 841 | leaks from old references while allowing the objects from the last |
|
842 | 842 | execution to be accessible. |
|
843 | 843 | |
|
844 | 844 | Note: we can not allow the actual FakeModule instances to be deleted, |
|
845 | 845 | because of how Python tears down modules (it hard-sets all their |
|
846 | 846 | references to None without regard for reference counts). This method |
|
847 | 847 | must therefore make a *copy* of the given namespace, to allow the |
|
848 | 848 | original module's __dict__ to be cleared and reused. |
|
849 | 849 | |
|
850 | 850 | |
|
851 | 851 | Parameters |
|
852 | 852 | ---------- |
|
853 | 853 | ns : a namespace (a dict, typically) |
|
854 | 854 | |
|
855 | 855 | fname : str |
|
856 | 856 | Filename associated with the namespace. |
|
857 | 857 | |
|
858 | 858 | Examples |
|
859 | 859 | -------- |
|
860 | 860 | |
|
861 | 861 | In [10]: import IPython |
|
862 | 862 | |
|
863 | 863 | In [11]: _ip.cache_main_mod(IPython.__dict__,IPython.__file__) |
|
864 | 864 | |
|
865 | 865 | In [12]: IPython.__file__ in _ip._main_ns_cache |
|
866 | 866 | Out[12]: True |
|
867 | 867 | """ |
|
868 | 868 | self._main_ns_cache[os.path.abspath(fname)] = ns.copy() |
|
869 | 869 | |
|
870 | 870 | def clear_main_mod_cache(self): |
|
871 | 871 | """Clear the cache of main modules. |
|
872 | 872 | |
|
873 | 873 | Mainly for use by utilities like %reset. |
|
874 | 874 | |
|
875 | 875 | Examples |
|
876 | 876 | -------- |
|
877 | 877 | |
|
878 | 878 | In [15]: import IPython |
|
879 | 879 | |
|
880 | 880 | In [16]: _ip.cache_main_mod(IPython.__dict__,IPython.__file__) |
|
881 | 881 | |
|
882 | 882 | In [17]: len(_ip._main_ns_cache) > 0 |
|
883 | 883 | Out[17]: True |
|
884 | 884 | |
|
885 | 885 | In [18]: _ip.clear_main_mod_cache() |
|
886 | 886 | |
|
887 | 887 | In [19]: len(_ip._main_ns_cache) == 0 |
|
888 | 888 | Out[19]: True |
|
889 | 889 | """ |
|
890 | 890 | self._main_ns_cache.clear() |
|
891 | 891 | |
|
892 | 892 | #------------------------------------------------------------------------- |
|
893 | 893 | # Things related to debugging |
|
894 | 894 | #------------------------------------------------------------------------- |
|
895 | 895 | |
|
896 | 896 | def init_pdb(self): |
|
897 | 897 | # Set calling of pdb on exceptions |
|
898 | 898 | # self.call_pdb is a property |
|
899 | 899 | self.call_pdb = self.pdb |
|
900 | 900 | |
|
901 | 901 | def _get_call_pdb(self): |
|
902 | 902 | return self._call_pdb |
|
903 | 903 | |
|
904 | 904 | def _set_call_pdb(self,val): |
|
905 | 905 | |
|
906 | 906 | if val not in (0,1,False,True): |
|
907 | 907 | raise ValueError('new call_pdb value must be boolean') |
|
908 | 908 | |
|
909 | 909 | # store value in instance |
|
910 | 910 | self._call_pdb = val |
|
911 | 911 | |
|
912 | 912 | # notify the actual exception handlers |
|
913 | 913 | self.InteractiveTB.call_pdb = val |
|
914 | 914 | |
|
915 | 915 | call_pdb = property(_get_call_pdb,_set_call_pdb,None, |
|
916 | 916 | 'Control auto-activation of pdb at exceptions') |
|
917 | 917 | |
|
918 | 918 | def debugger(self,force=False): |
|
919 | 919 | """Call the pydb/pdb debugger. |
|
920 | 920 | |
|
921 | 921 | Keywords: |
|
922 | 922 | |
|
923 | 923 | - force(False): by default, this routine checks the instance call_pdb |
|
924 | 924 | flag and does not actually invoke the debugger if the flag is false. |
|
925 | 925 | The 'force' option forces the debugger to activate even if the flag |
|
926 | 926 | is false. |
|
927 | 927 | """ |
|
928 | 928 | |
|
929 | 929 | if not (force or self.call_pdb): |
|
930 | 930 | return |
|
931 | 931 | |
|
932 | 932 | if not hasattr(sys,'last_traceback'): |
|
933 | 933 | error('No traceback has been produced, nothing to debug.') |
|
934 | 934 | return |
|
935 | 935 | |
|
936 | 936 | # use pydb if available |
|
937 | 937 | if debugger.has_pydb: |
|
938 | 938 | from pydb import pm |
|
939 | 939 | else: |
|
940 | 940 | # fallback to our internal debugger |
|
941 | 941 | pm = lambda : self.InteractiveTB.debugger(force=True) |
|
942 | 942 | |
|
943 | 943 | with self.readline_no_record: |
|
944 | 944 | pm() |
|
945 | 945 | |
|
946 | 946 | #------------------------------------------------------------------------- |
|
947 | 947 | # Things related to IPython's various namespaces |
|
948 | 948 | #------------------------------------------------------------------------- |
|
949 | 949 | default_user_namespaces = True |
|
950 | 950 | |
|
951 | 951 | def init_create_namespaces(self, user_module=None, user_ns=None): |
|
952 | 952 | # Create the namespace where the user will operate. user_ns is |
|
953 | 953 | # normally the only one used, and it is passed to the exec calls as |
|
954 | 954 | # the locals argument. But we do carry a user_global_ns namespace |
|
955 | 955 | # given as the exec 'globals' argument, This is useful in embedding |
|
956 | 956 | # situations where the ipython shell opens in a context where the |
|
957 | 957 | # distinction between locals and globals is meaningful. For |
|
958 | 958 | # non-embedded contexts, it is just the same object as the user_ns dict. |
|
959 | 959 | |
|
960 | 960 | # FIXME. For some strange reason, __builtins__ is showing up at user |
|
961 | 961 | # level as a dict instead of a module. This is a manual fix, but I |
|
962 | 962 | # should really track down where the problem is coming from. Alex |
|
963 | 963 | # Schmolck reported this problem first. |
|
964 | 964 | |
|
965 | 965 | # A useful post by Alex Martelli on this topic: |
|
966 | 966 | # Re: inconsistent value from __builtins__ |
|
967 | 967 | # Von: Alex Martelli <aleaxit@yahoo.com> |
|
968 | 968 | # Datum: Freitag 01 Oktober 2004 04:45:34 nachmittags/abends |
|
969 | 969 | # Gruppen: comp.lang.python |
|
970 | 970 | |
|
971 | 971 | # Michael Hohn <hohn@hooknose.lbl.gov> wrote: |
|
972 | 972 | # > >>> print type(builtin_check.get_global_binding('__builtins__')) |
|
973 | 973 | # > <type 'dict'> |
|
974 | 974 | # > >>> print type(__builtins__) |
|
975 | 975 | # > <type 'module'> |
|
976 | 976 | # > Is this difference in return value intentional? |
|
977 | 977 | |
|
978 | 978 | # Well, it's documented that '__builtins__' can be either a dictionary |
|
979 | 979 | # or a module, and it's been that way for a long time. Whether it's |
|
980 | 980 | # intentional (or sensible), I don't know. In any case, the idea is |
|
981 | 981 | # that if you need to access the built-in namespace directly, you |
|
982 | 982 | # should start with "import __builtin__" (note, no 's') which will |
|
983 | 983 | # definitely give you a module. Yeah, it's somewhat confusing:-(. |
|
984 | 984 | |
|
985 | 985 | # These routines return a properly built module and dict as needed by |
|
986 | 986 | # the rest of the code, and can also be used by extension writers to |
|
987 | 987 | # generate properly initialized namespaces. |
|
988 | 988 | if (user_ns is not None) or (user_module is not None): |
|
989 | 989 | self.default_user_namespaces = False |
|
990 | 990 | self.user_module, self.user_ns = self.prepare_user_module(user_module, user_ns) |
|
991 | 991 | |
|
992 | 992 | # A record of hidden variables we have added to the user namespace, so |
|
993 | 993 | # we can list later only variables defined in actual interactive use. |
|
994 | 994 | self.user_ns_hidden = set() |
|
995 | 995 | |
|
996 | 996 | # Now that FakeModule produces a real module, we've run into a nasty |
|
997 | 997 | # problem: after script execution (via %run), the module where the user |
|
998 | 998 | # code ran is deleted. Now that this object is a true module (needed |
|
999 | 999 | # so docetst and other tools work correctly), the Python module |
|
1000 | 1000 | # teardown mechanism runs over it, and sets to None every variable |
|
1001 | 1001 | # present in that module. Top-level references to objects from the |
|
1002 | 1002 | # script survive, because the user_ns is updated with them. However, |
|
1003 | 1003 | # calling functions defined in the script that use other things from |
|
1004 | 1004 | # the script will fail, because the function's closure had references |
|
1005 | 1005 | # to the original objects, which are now all None. So we must protect |
|
1006 | 1006 | # these modules from deletion by keeping a cache. |
|
1007 | 1007 | # |
|
1008 | 1008 | # To avoid keeping stale modules around (we only need the one from the |
|
1009 | 1009 | # last run), we use a dict keyed with the full path to the script, so |
|
1010 | 1010 | # only the last version of the module is held in the cache. Note, |
|
1011 | 1011 | # however, that we must cache the module *namespace contents* (their |
|
1012 | 1012 | # __dict__). Because if we try to cache the actual modules, old ones |
|
1013 | 1013 | # (uncached) could be destroyed while still holding references (such as |
|
1014 | 1014 | # those held by GUI objects that tend to be long-lived)> |
|
1015 | 1015 | # |
|
1016 | 1016 | # The %reset command will flush this cache. See the cache_main_mod() |
|
1017 | 1017 | # and clear_main_mod_cache() methods for details on use. |
|
1018 | 1018 | |
|
1019 | 1019 | # This is the cache used for 'main' namespaces |
|
1020 | 1020 | self._main_ns_cache = {} |
|
1021 | 1021 | # And this is the single instance of FakeModule whose __dict__ we keep |
|
1022 | 1022 | # copying and clearing for reuse on each %run |
|
1023 | 1023 | self._user_main_module = FakeModule() |
|
1024 | 1024 | |
|
1025 | 1025 | # A table holding all the namespaces IPython deals with, so that |
|
1026 | 1026 | # introspection facilities can search easily. |
|
1027 | 1027 | self.ns_table = {'user_global':self.user_module.__dict__, |
|
1028 | 1028 | 'user_local':self.user_ns, |
|
1029 | 1029 | 'builtin':builtin_mod.__dict__ |
|
1030 | 1030 | } |
|
1031 | 1031 | |
|
1032 | 1032 | @property |
|
1033 | 1033 | def user_global_ns(self): |
|
1034 | 1034 | return self.user_module.__dict__ |
|
1035 | 1035 | |
|
1036 | 1036 | def prepare_user_module(self, user_module=None, user_ns=None): |
|
1037 | 1037 | """Prepare the module and namespace in which user code will be run. |
|
1038 | 1038 | |
|
1039 | 1039 | When IPython is started normally, both parameters are None: a new module |
|
1040 | 1040 | is created automatically, and its __dict__ used as the namespace. |
|
1041 | 1041 | |
|
1042 | 1042 | If only user_module is provided, its __dict__ is used as the namespace. |
|
1043 | 1043 | If only user_ns is provided, a dummy module is created, and user_ns |
|
1044 | 1044 | becomes the global namespace. If both are provided (as they may be |
|
1045 | 1045 | when embedding), user_ns is the local namespace, and user_module |
|
1046 | 1046 | provides the global namespace. |
|
1047 | 1047 | |
|
1048 | 1048 | Parameters |
|
1049 | 1049 | ---------- |
|
1050 | 1050 | user_module : module, optional |
|
1051 | 1051 | The current user module in which IPython is being run. If None, |
|
1052 | 1052 | a clean module will be created. |
|
1053 | 1053 | user_ns : dict, optional |
|
1054 | 1054 | A namespace in which to run interactive commands. |
|
1055 | 1055 | |
|
1056 | 1056 | Returns |
|
1057 | 1057 | ------- |
|
1058 | 1058 | A tuple of user_module and user_ns, each properly initialised. |
|
1059 | 1059 | """ |
|
1060 | 1060 | if user_module is None and user_ns is not None: |
|
1061 | 1061 | user_ns.setdefault("__name__", "__main__") |
|
1062 | 1062 | class DummyMod(object): |
|
1063 | 1063 | "A dummy module used for IPython's interactive namespace." |
|
1064 | 1064 | pass |
|
1065 | 1065 | user_module = DummyMod() |
|
1066 | 1066 | user_module.__dict__ = user_ns |
|
1067 | 1067 | |
|
1068 | 1068 | if user_module is None: |
|
1069 | 1069 | user_module = types.ModuleType("__main__", |
|
1070 | 1070 | doc="Automatically created module for IPython interactive environment") |
|
1071 | 1071 | |
|
1072 | 1072 | # We must ensure that __builtin__ (without the final 's') is always |
|
1073 | 1073 | # available and pointing to the __builtin__ *module*. For more details: |
|
1074 | 1074 | # http://mail.python.org/pipermail/python-dev/2001-April/014068.html |
|
1075 | 1075 | user_module.__dict__.setdefault('__builtin__', builtin_mod) |
|
1076 | 1076 | user_module.__dict__.setdefault('__builtins__', builtin_mod) |
|
1077 | 1077 | |
|
1078 | 1078 | if user_ns is None: |
|
1079 | 1079 | user_ns = user_module.__dict__ |
|
1080 | 1080 | |
|
1081 | 1081 | return user_module, user_ns |
|
1082 | 1082 | |
|
1083 | 1083 | def init_sys_modules(self): |
|
1084 | 1084 | # We need to insert into sys.modules something that looks like a |
|
1085 | 1085 | # module but which accesses the IPython namespace, for shelve and |
|
1086 | 1086 | # pickle to work interactively. Normally they rely on getting |
|
1087 | 1087 | # everything out of __main__, but for embedding purposes each IPython |
|
1088 | 1088 | # instance has its own private namespace, so we can't go shoving |
|
1089 | 1089 | # everything into __main__. |
|
1090 | 1090 | |
|
1091 | 1091 | # note, however, that we should only do this for non-embedded |
|
1092 | 1092 | # ipythons, which really mimic the __main__.__dict__ with their own |
|
1093 | 1093 | # namespace. Embedded instances, on the other hand, should not do |
|
1094 | 1094 | # this because they need to manage the user local/global namespaces |
|
1095 | 1095 | # only, but they live within a 'normal' __main__ (meaning, they |
|
1096 | 1096 | # shouldn't overtake the execution environment of the script they're |
|
1097 | 1097 | # embedded in). |
|
1098 | 1098 | |
|
1099 | 1099 | # This is overridden in the InteractiveShellEmbed subclass to a no-op. |
|
1100 | 1100 | main_name = self.user_module.__name__ |
|
1101 | 1101 | sys.modules[main_name] = self.user_module |
|
1102 | 1102 | |
|
1103 | 1103 | def init_user_ns(self): |
|
1104 | 1104 | """Initialize all user-visible namespaces to their minimum defaults. |
|
1105 | 1105 | |
|
1106 | 1106 | Certain history lists are also initialized here, as they effectively |
|
1107 | 1107 | act as user namespaces. |
|
1108 | 1108 | |
|
1109 | 1109 | Notes |
|
1110 | 1110 | ----- |
|
1111 | 1111 | All data structures here are only filled in, they are NOT reset by this |
|
1112 | 1112 | method. If they were not empty before, data will simply be added to |
|
1113 | 1113 | therm. |
|
1114 | 1114 | """ |
|
1115 | 1115 | # This function works in two parts: first we put a few things in |
|
1116 | 1116 | # user_ns, and we sync that contents into user_ns_hidden so that these |
|
1117 | 1117 | # initial variables aren't shown by %who. After the sync, we add the |
|
1118 | 1118 | # rest of what we *do* want the user to see with %who even on a new |
|
1119 | 1119 | # session (probably nothing, so theye really only see their own stuff) |
|
1120 | 1120 | |
|
1121 | 1121 | # The user dict must *always* have a __builtin__ reference to the |
|
1122 | 1122 | # Python standard __builtin__ namespace, which must be imported. |
|
1123 | 1123 | # This is so that certain operations in prompt evaluation can be |
|
1124 | 1124 | # reliably executed with builtins. Note that we can NOT use |
|
1125 | 1125 | # __builtins__ (note the 's'), because that can either be a dict or a |
|
1126 | 1126 | # module, and can even mutate at runtime, depending on the context |
|
1127 | 1127 | # (Python makes no guarantees on it). In contrast, __builtin__ is |
|
1128 | 1128 | # always a module object, though it must be explicitly imported. |
|
1129 | 1129 | |
|
1130 | 1130 | # For more details: |
|
1131 | 1131 | # http://mail.python.org/pipermail/python-dev/2001-April/014068.html |
|
1132 | 1132 | ns = dict() |
|
1133 | 1133 | |
|
1134 | 1134 | # Put 'help' in the user namespace |
|
1135 | 1135 | try: |
|
1136 | 1136 | from site import _Helper |
|
1137 | 1137 | ns['help'] = _Helper() |
|
1138 | 1138 | except ImportError: |
|
1139 | 1139 | warn('help() not available - check site.py') |
|
1140 | 1140 | |
|
1141 | 1141 | # make global variables for user access to the histories |
|
1142 | 1142 | ns['_ih'] = self.history_manager.input_hist_parsed |
|
1143 | 1143 | ns['_oh'] = self.history_manager.output_hist |
|
1144 | 1144 | ns['_dh'] = self.history_manager.dir_hist |
|
1145 | 1145 | |
|
1146 | 1146 | ns['_sh'] = shadowns |
|
1147 | 1147 | |
|
1148 | 1148 | # user aliases to input and output histories. These shouldn't show up |
|
1149 | 1149 | # in %who, as they can have very large reprs. |
|
1150 | 1150 | ns['In'] = self.history_manager.input_hist_parsed |
|
1151 | 1151 | ns['Out'] = self.history_manager.output_hist |
|
1152 | 1152 | |
|
1153 | 1153 | # Store myself as the public api!!! |
|
1154 | 1154 | ns['get_ipython'] = self.get_ipython |
|
1155 | 1155 | |
|
1156 | 1156 | ns['exit'] = self.exiter |
|
1157 | 1157 | ns['quit'] = self.exiter |
|
1158 | 1158 | |
|
1159 | 1159 | # Sync what we've added so far to user_ns_hidden so these aren't seen |
|
1160 | 1160 | # by %who |
|
1161 | 1161 | self.user_ns_hidden.update(ns) |
|
1162 | 1162 | |
|
1163 | 1163 | # Anything put into ns now would show up in %who. Think twice before |
|
1164 | 1164 | # putting anything here, as we really want %who to show the user their |
|
1165 | 1165 | # stuff, not our variables. |
|
1166 | 1166 | |
|
1167 | 1167 | # Finally, update the real user's namespace |
|
1168 | 1168 | self.user_ns.update(ns) |
|
1169 | 1169 | |
|
1170 | 1170 | @property |
|
1171 | 1171 | def all_ns_refs(self): |
|
1172 | 1172 | """Get a list of references to all the namespace dictionaries in which |
|
1173 | 1173 | IPython might store a user-created object. |
|
1174 | 1174 | |
|
1175 | 1175 | Note that this does not include the displayhook, which also caches |
|
1176 | 1176 | objects from the output.""" |
|
1177 | 1177 | return [self.user_ns, self.user_global_ns, |
|
1178 | 1178 | self._user_main_module.__dict__] + self._main_ns_cache.values() |
|
1179 | 1179 | |
|
1180 | 1180 | def reset(self, new_session=True): |
|
1181 | 1181 | """Clear all internal namespaces, and attempt to release references to |
|
1182 | 1182 | user objects. |
|
1183 | 1183 | |
|
1184 | 1184 | If new_session is True, a new history session will be opened. |
|
1185 | 1185 | """ |
|
1186 | 1186 | # Clear histories |
|
1187 | 1187 | self.history_manager.reset(new_session) |
|
1188 | 1188 | # Reset counter used to index all histories |
|
1189 | 1189 | if new_session: |
|
1190 | 1190 | self.execution_count = 1 |
|
1191 | 1191 | |
|
1192 | 1192 | # Flush cached output items |
|
1193 | 1193 | if self.displayhook.do_full_cache: |
|
1194 | 1194 | self.displayhook.flush() |
|
1195 | 1195 | |
|
1196 | 1196 | # The main execution namespaces must be cleared very carefully, |
|
1197 | 1197 | # skipping the deletion of the builtin-related keys, because doing so |
|
1198 | 1198 | # would cause errors in many object's __del__ methods. |
|
1199 | 1199 | if self.user_ns is not self.user_global_ns: |
|
1200 | 1200 | self.user_ns.clear() |
|
1201 | 1201 | ns = self.user_global_ns |
|
1202 | 1202 | drop_keys = set(ns.keys()) |
|
1203 | 1203 | drop_keys.discard('__builtin__') |
|
1204 | 1204 | drop_keys.discard('__builtins__') |
|
1205 | 1205 | drop_keys.discard('__name__') |
|
1206 | 1206 | for k in drop_keys: |
|
1207 | 1207 | del ns[k] |
|
1208 | 1208 | |
|
1209 | 1209 | self.user_ns_hidden.clear() |
|
1210 | 1210 | |
|
1211 | 1211 | # Restore the user namespaces to minimal usability |
|
1212 | 1212 | self.init_user_ns() |
|
1213 | 1213 | |
|
1214 | 1214 | # Restore the default and user aliases |
|
1215 | 1215 | self.alias_manager.clear_aliases() |
|
1216 | 1216 | self.alias_manager.init_aliases() |
|
1217 | 1217 | |
|
1218 | 1218 | # Flush the private list of module references kept for script |
|
1219 | 1219 | # execution protection |
|
1220 | 1220 | self.clear_main_mod_cache() |
|
1221 | 1221 | |
|
1222 | 1222 | # Clear out the namespace from the last %run |
|
1223 | 1223 | self.new_main_mod() |
|
1224 | 1224 | |
|
1225 | 1225 | def del_var(self, varname, by_name=False): |
|
1226 | 1226 | """Delete a variable from the various namespaces, so that, as |
|
1227 | 1227 | far as possible, we're not keeping any hidden references to it. |
|
1228 | 1228 | |
|
1229 | 1229 | Parameters |
|
1230 | 1230 | ---------- |
|
1231 | 1231 | varname : str |
|
1232 | 1232 | The name of the variable to delete. |
|
1233 | 1233 | by_name : bool |
|
1234 | 1234 | If True, delete variables with the given name in each |
|
1235 | 1235 | namespace. If False (default), find the variable in the user |
|
1236 | 1236 | namespace, and delete references to it. |
|
1237 | 1237 | """ |
|
1238 | 1238 | if varname in ('__builtin__', '__builtins__'): |
|
1239 | 1239 | raise ValueError("Refusing to delete %s" % varname) |
|
1240 | 1240 | |
|
1241 | 1241 | ns_refs = self.all_ns_refs |
|
1242 | 1242 | |
|
1243 | 1243 | if by_name: # Delete by name |
|
1244 | 1244 | for ns in ns_refs: |
|
1245 | 1245 | try: |
|
1246 | 1246 | del ns[varname] |
|
1247 | 1247 | except KeyError: |
|
1248 | 1248 | pass |
|
1249 | 1249 | else: # Delete by object |
|
1250 | 1250 | try: |
|
1251 | 1251 | obj = self.user_ns[varname] |
|
1252 | 1252 | except KeyError: |
|
1253 | 1253 | raise NameError("name '%s' is not defined" % varname) |
|
1254 | 1254 | # Also check in output history |
|
1255 | 1255 | ns_refs.append(self.history_manager.output_hist) |
|
1256 | 1256 | for ns in ns_refs: |
|
1257 | 1257 | to_delete = [n for n, o in ns.iteritems() if o is obj] |
|
1258 | 1258 | for name in to_delete: |
|
1259 | 1259 | del ns[name] |
|
1260 | 1260 | |
|
1261 | 1261 | # displayhook keeps extra references, but not in a dictionary |
|
1262 | 1262 | for name in ('_', '__', '___'): |
|
1263 | 1263 | if getattr(self.displayhook, name) is obj: |
|
1264 | 1264 | setattr(self.displayhook, name, None) |
|
1265 | 1265 | |
|
1266 | 1266 | def reset_selective(self, regex=None): |
|
1267 | 1267 | """Clear selective variables from internal namespaces based on a |
|
1268 | 1268 | specified regular expression. |
|
1269 | 1269 | |
|
1270 | 1270 | Parameters |
|
1271 | 1271 | ---------- |
|
1272 | 1272 | regex : string or compiled pattern, optional |
|
1273 | 1273 | A regular expression pattern that will be used in searching |
|
1274 | 1274 | variable names in the users namespaces. |
|
1275 | 1275 | """ |
|
1276 | 1276 | if regex is not None: |
|
1277 | 1277 | try: |
|
1278 | 1278 | m = re.compile(regex) |
|
1279 | 1279 | except TypeError: |
|
1280 | 1280 | raise TypeError('regex must be a string or compiled pattern') |
|
1281 | 1281 | # Search for keys in each namespace that match the given regex |
|
1282 | 1282 | # If a match is found, delete the key/value pair. |
|
1283 | 1283 | for ns in self.all_ns_refs: |
|
1284 | 1284 | for var in ns: |
|
1285 | 1285 | if m.search(var): |
|
1286 | 1286 | del ns[var] |
|
1287 | 1287 | |
|
1288 | 1288 | def push(self, variables, interactive=True): |
|
1289 | 1289 | """Inject a group of variables into the IPython user namespace. |
|
1290 | 1290 | |
|
1291 | 1291 | Parameters |
|
1292 | 1292 | ---------- |
|
1293 | 1293 | variables : dict, str or list/tuple of str |
|
1294 | 1294 | The variables to inject into the user's namespace. If a dict, a |
|
1295 | 1295 | simple update is done. If a str, the string is assumed to have |
|
1296 | 1296 | variable names separated by spaces. A list/tuple of str can also |
|
1297 | 1297 | be used to give the variable names. If just the variable names are |
|
1298 | 1298 | give (list/tuple/str) then the variable values looked up in the |
|
1299 | 1299 | callers frame. |
|
1300 | 1300 | interactive : bool |
|
1301 | 1301 | If True (default), the variables will be listed with the ``who`` |
|
1302 | 1302 | magic. |
|
1303 | 1303 | """ |
|
1304 | 1304 | vdict = None |
|
1305 | 1305 | |
|
1306 | 1306 | # We need a dict of name/value pairs to do namespace updates. |
|
1307 | 1307 | if isinstance(variables, dict): |
|
1308 | 1308 | vdict = variables |
|
1309 | 1309 | elif isinstance(variables, (basestring, list, tuple)): |
|
1310 | 1310 | if isinstance(variables, basestring): |
|
1311 | 1311 | vlist = variables.split() |
|
1312 | 1312 | else: |
|
1313 | 1313 | vlist = variables |
|
1314 | 1314 | vdict = {} |
|
1315 | 1315 | cf = sys._getframe(1) |
|
1316 | 1316 | for name in vlist: |
|
1317 | 1317 | try: |
|
1318 | 1318 | vdict[name] = eval(name, cf.f_globals, cf.f_locals) |
|
1319 | 1319 | except: |
|
1320 | 1320 | print('Could not get variable %s from %s' % |
|
1321 | 1321 | (name,cf.f_code.co_name)) |
|
1322 | 1322 | else: |
|
1323 | 1323 | raise ValueError('variables must be a dict/str/list/tuple') |
|
1324 | 1324 | |
|
1325 | 1325 | # Propagate variables to user namespace |
|
1326 | 1326 | self.user_ns.update(vdict) |
|
1327 | 1327 | |
|
1328 | 1328 | # And configure interactive visibility |
|
1329 | 1329 | user_ns_hidden = self.user_ns_hidden |
|
1330 | 1330 | if interactive: |
|
1331 | 1331 | user_ns_hidden.difference_update(vdict) |
|
1332 | 1332 | else: |
|
1333 | 1333 | user_ns_hidden.update(vdict) |
|
1334 | 1334 | |
|
1335 | 1335 | def drop_by_id(self, variables): |
|
1336 | 1336 | """Remove a dict of variables from the user namespace, if they are the |
|
1337 | 1337 | same as the values in the dictionary. |
|
1338 | 1338 | |
|
1339 | 1339 | This is intended for use by extensions: variables that they've added can |
|
1340 | 1340 | be taken back out if they are unloaded, without removing any that the |
|
1341 | 1341 | user has overwritten. |
|
1342 | 1342 | |
|
1343 | 1343 | Parameters |
|
1344 | 1344 | ---------- |
|
1345 | 1345 | variables : dict |
|
1346 | 1346 | A dictionary mapping object names (as strings) to the objects. |
|
1347 | 1347 | """ |
|
1348 | 1348 | for name, obj in variables.iteritems(): |
|
1349 | 1349 | if name in self.user_ns and self.user_ns[name] is obj: |
|
1350 | 1350 | del self.user_ns[name] |
|
1351 | 1351 | self.user_ns_hidden.discard(name) |
|
1352 | 1352 | |
|
1353 | 1353 | #------------------------------------------------------------------------- |
|
1354 | 1354 | # Things related to object introspection |
|
1355 | 1355 | #------------------------------------------------------------------------- |
|
1356 | 1356 | |
|
1357 | 1357 | def _ofind(self, oname, namespaces=None): |
|
1358 | 1358 | """Find an object in the available namespaces. |
|
1359 | 1359 | |
|
1360 | 1360 | self._ofind(oname) -> dict with keys: found,obj,ospace,ismagic |
|
1361 | 1361 | |
|
1362 | 1362 | Has special code to detect magic functions. |
|
1363 | 1363 | """ |
|
1364 | 1364 | oname = oname.strip() |
|
1365 | 1365 | #print '1- oname: <%r>' % oname # dbg |
|
1366 | 1366 | if not oname.startswith(ESC_MAGIC) and \ |
|
1367 | 1367 | not oname.startswith(ESC_MAGIC2) and \ |
|
1368 | 1368 | not py3compat.isidentifier(oname, dotted=True): |
|
1369 | 1369 | return dict(found=False) |
|
1370 | 1370 | |
|
1371 | 1371 | alias_ns = None |
|
1372 | 1372 | if namespaces is None: |
|
1373 | 1373 | # Namespaces to search in: |
|
1374 | 1374 | # Put them in a list. The order is important so that we |
|
1375 | 1375 | # find things in the same order that Python finds them. |
|
1376 | 1376 | namespaces = [ ('Interactive', self.user_ns), |
|
1377 | 1377 | ('Interactive (global)', self.user_global_ns), |
|
1378 | 1378 | ('Python builtin', builtin_mod.__dict__), |
|
1379 | 1379 | ('Alias', self.alias_manager.alias_table), |
|
1380 | 1380 | ] |
|
1381 | 1381 | alias_ns = self.alias_manager.alias_table |
|
1382 | 1382 | |
|
1383 | 1383 | # initialize results to 'null' |
|
1384 | 1384 | found = False; obj = None; ospace = None; ds = None; |
|
1385 | 1385 | ismagic = False; isalias = False; parent = None |
|
1386 | 1386 | |
|
1387 | 1387 | # We need to special-case 'print', which as of python2.6 registers as a |
|
1388 | 1388 | # function but should only be treated as one if print_function was |
|
1389 | 1389 | # loaded with a future import. In this case, just bail. |
|
1390 | 1390 | if (oname == 'print' and not py3compat.PY3 and not \ |
|
1391 | 1391 | (self.compile.compiler_flags & __future__.CO_FUTURE_PRINT_FUNCTION)): |
|
1392 | 1392 | return {'found':found, 'obj':obj, 'namespace':ospace, |
|
1393 | 1393 | 'ismagic':ismagic, 'isalias':isalias, 'parent':parent} |
|
1394 | 1394 | |
|
1395 | 1395 | # Look for the given name by splitting it in parts. If the head is |
|
1396 | 1396 | # found, then we look for all the remaining parts as members, and only |
|
1397 | 1397 | # declare success if we can find them all. |
|
1398 | 1398 | oname_parts = oname.split('.') |
|
1399 | 1399 | oname_head, oname_rest = oname_parts[0],oname_parts[1:] |
|
1400 | 1400 | for nsname,ns in namespaces: |
|
1401 | 1401 | try: |
|
1402 | 1402 | obj = ns[oname_head] |
|
1403 | 1403 | except KeyError: |
|
1404 | 1404 | continue |
|
1405 | 1405 | else: |
|
1406 | 1406 | #print 'oname_rest:', oname_rest # dbg |
|
1407 | 1407 | for part in oname_rest: |
|
1408 | 1408 | try: |
|
1409 | 1409 | parent = obj |
|
1410 | 1410 | obj = getattr(obj,part) |
|
1411 | 1411 | except: |
|
1412 | 1412 | # Blanket except b/c some badly implemented objects |
|
1413 | 1413 | # allow __getattr__ to raise exceptions other than |
|
1414 | 1414 | # AttributeError, which then crashes IPython. |
|
1415 | 1415 | break |
|
1416 | 1416 | else: |
|
1417 | 1417 | # If we finish the for loop (no break), we got all members |
|
1418 | 1418 | found = True |
|
1419 | 1419 | ospace = nsname |
|
1420 | 1420 | if ns == alias_ns: |
|
1421 | 1421 | isalias = True |
|
1422 | 1422 | break # namespace loop |
|
1423 | 1423 | |
|
1424 | 1424 | # Try to see if it's magic |
|
1425 | 1425 | if not found: |
|
1426 | 1426 | obj = None |
|
1427 | 1427 | if oname.startswith(ESC_MAGIC2): |
|
1428 | 1428 | oname = oname.lstrip(ESC_MAGIC2) |
|
1429 | 1429 | obj = self.find_cell_magic(oname) |
|
1430 | 1430 | elif oname.startswith(ESC_MAGIC): |
|
1431 | 1431 | oname = oname.lstrip(ESC_MAGIC) |
|
1432 | 1432 | obj = self.find_line_magic(oname) |
|
1433 | 1433 | else: |
|
1434 | 1434 | # search without prefix, so run? will find %run? |
|
1435 | 1435 | obj = self.find_line_magic(oname) |
|
1436 | 1436 | if obj is None: |
|
1437 | 1437 | obj = self.find_cell_magic(oname) |
|
1438 | 1438 | if obj is not None: |
|
1439 | 1439 | found = True |
|
1440 | 1440 | ospace = 'IPython internal' |
|
1441 | 1441 | ismagic = True |
|
1442 | 1442 | |
|
1443 | 1443 | # Last try: special-case some literals like '', [], {}, etc: |
|
1444 | 1444 | if not found and oname_head in ["''",'""','[]','{}','()']: |
|
1445 | 1445 | obj = eval(oname_head) |
|
1446 | 1446 | found = True |
|
1447 | 1447 | ospace = 'Interactive' |
|
1448 | 1448 | |
|
1449 | 1449 | return {'found':found, 'obj':obj, 'namespace':ospace, |
|
1450 | 1450 | 'ismagic':ismagic, 'isalias':isalias, 'parent':parent} |
|
1451 | 1451 | |
|
1452 | 1452 | def _ofind_property(self, oname, info): |
|
1453 | 1453 | """Second part of object finding, to look for property details.""" |
|
1454 | 1454 | if info.found: |
|
1455 | 1455 | # Get the docstring of the class property if it exists. |
|
1456 | 1456 | path = oname.split('.') |
|
1457 | 1457 | root = '.'.join(path[:-1]) |
|
1458 | 1458 | if info.parent is not None: |
|
1459 | 1459 | try: |
|
1460 | 1460 | target = getattr(info.parent, '__class__') |
|
1461 | 1461 | # The object belongs to a class instance. |
|
1462 | 1462 | try: |
|
1463 | 1463 | target = getattr(target, path[-1]) |
|
1464 | 1464 | # The class defines the object. |
|
1465 | 1465 | if isinstance(target, property): |
|
1466 | 1466 | oname = root + '.__class__.' + path[-1] |
|
1467 | 1467 | info = Struct(self._ofind(oname)) |
|
1468 | 1468 | except AttributeError: pass |
|
1469 | 1469 | except AttributeError: pass |
|
1470 | 1470 | |
|
1471 | 1471 | # We return either the new info or the unmodified input if the object |
|
1472 | 1472 | # hadn't been found |
|
1473 | 1473 | return info |
|
1474 | 1474 | |
|
1475 | 1475 | def _object_find(self, oname, namespaces=None): |
|
1476 | 1476 | """Find an object and return a struct with info about it.""" |
|
1477 | 1477 | inf = Struct(self._ofind(oname, namespaces)) |
|
1478 | 1478 | return Struct(self._ofind_property(oname, inf)) |
|
1479 | 1479 | |
|
1480 | 1480 | def _inspect(self, meth, oname, namespaces=None, **kw): |
|
1481 | 1481 | """Generic interface to the inspector system. |
|
1482 | 1482 | |
|
1483 | 1483 | This function is meant to be called by pdef, pdoc & friends.""" |
|
1484 | 1484 | info = self._object_find(oname, namespaces) |
|
1485 | 1485 | if info.found: |
|
1486 | 1486 | pmethod = getattr(self.inspector, meth) |
|
1487 | 1487 | formatter = format_screen if info.ismagic else None |
|
1488 | 1488 | if meth == 'pdoc': |
|
1489 | 1489 | pmethod(info.obj, oname, formatter) |
|
1490 | 1490 | elif meth == 'pinfo': |
|
1491 | 1491 | pmethod(info.obj, oname, formatter, info, **kw) |
|
1492 | 1492 | else: |
|
1493 | 1493 | pmethod(info.obj, oname) |
|
1494 | 1494 | else: |
|
1495 | 1495 | print('Object `%s` not found.' % oname) |
|
1496 | 1496 | return 'not found' # so callers can take other action |
|
1497 | 1497 | |
|
1498 | 1498 | def object_inspect(self, oname, detail_level=0): |
|
1499 | 1499 | with self.builtin_trap: |
|
1500 | 1500 | info = self._object_find(oname) |
|
1501 | 1501 | if info.found: |
|
1502 | 1502 | return self.inspector.info(info.obj, oname, info=info, |
|
1503 | 1503 | detail_level=detail_level |
|
1504 | 1504 | ) |
|
1505 | 1505 | else: |
|
1506 | 1506 | return oinspect.object_info(name=oname, found=False) |
|
1507 | 1507 | |
|
1508 | 1508 | #------------------------------------------------------------------------- |
|
1509 | 1509 | # Things related to history management |
|
1510 | 1510 | #------------------------------------------------------------------------- |
|
1511 | 1511 | |
|
1512 | 1512 | def init_history(self): |
|
1513 | 1513 | """Sets up the command history, and starts regular autosaves.""" |
|
1514 | 1514 | self.history_manager = HistoryManager(shell=self, config=self.config) |
|
1515 | 1515 | self.configurables.append(self.history_manager) |
|
1516 | 1516 | |
|
1517 | 1517 | #------------------------------------------------------------------------- |
|
1518 | 1518 | # Things related to exception handling and tracebacks (not debugging) |
|
1519 | 1519 | #------------------------------------------------------------------------- |
|
1520 | 1520 | |
|
1521 | 1521 | def init_traceback_handlers(self, custom_exceptions): |
|
1522 | 1522 | # Syntax error handler. |
|
1523 | 1523 | self.SyntaxTB = ultratb.SyntaxTB(color_scheme='NoColor') |
|
1524 | 1524 | |
|
1525 | 1525 | # The interactive one is initialized with an offset, meaning we always |
|
1526 | 1526 | # want to remove the topmost item in the traceback, which is our own |
|
1527 | 1527 | # internal code. Valid modes: ['Plain','Context','Verbose'] |
|
1528 | 1528 | self.InteractiveTB = ultratb.AutoFormattedTB(mode = 'Plain', |
|
1529 | 1529 | color_scheme='NoColor', |
|
1530 | 1530 | tb_offset = 1, |
|
1531 | 1531 | check_cache=check_linecache_ipython) |
|
1532 | 1532 | |
|
1533 | 1533 | # The instance will store a pointer to the system-wide exception hook, |
|
1534 | 1534 | # so that runtime code (such as magics) can access it. This is because |
|
1535 | 1535 | # during the read-eval loop, it may get temporarily overwritten. |
|
1536 | 1536 | self.sys_excepthook = sys.excepthook |
|
1537 | 1537 | |
|
1538 | 1538 | # and add any custom exception handlers the user may have specified |
|
1539 | 1539 | self.set_custom_exc(*custom_exceptions) |
|
1540 | 1540 | |
|
1541 | 1541 | # Set the exception mode |
|
1542 | 1542 | self.InteractiveTB.set_mode(mode=self.xmode) |
|
1543 | 1543 | |
|
1544 | 1544 | def set_custom_exc(self, exc_tuple, handler): |
|
1545 | 1545 | """set_custom_exc(exc_tuple,handler) |
|
1546 | 1546 | |
|
1547 | 1547 | Set a custom exception handler, which will be called if any of the |
|
1548 | 1548 | exceptions in exc_tuple occur in the mainloop (specifically, in the |
|
1549 | 1549 | run_code() method). |
|
1550 | 1550 | |
|
1551 | 1551 | Parameters |
|
1552 | 1552 | ---------- |
|
1553 | 1553 | |
|
1554 | 1554 | exc_tuple : tuple of exception classes |
|
1555 | 1555 | A *tuple* of exception classes, for which to call the defined |
|
1556 | 1556 | handler. It is very important that you use a tuple, and NOT A |
|
1557 | 1557 | LIST here, because of the way Python's except statement works. If |
|
1558 | 1558 | you only want to trap a single exception, use a singleton tuple:: |
|
1559 | 1559 | |
|
1560 | 1560 | exc_tuple == (MyCustomException,) |
|
1561 | 1561 | |
|
1562 | 1562 | handler : callable |
|
1563 | 1563 | handler must have the following signature:: |
|
1564 | 1564 | |
|
1565 | 1565 | def my_handler(self, etype, value, tb, tb_offset=None): |
|
1566 | 1566 | ... |
|
1567 | 1567 | return structured_traceback |
|
1568 | 1568 | |
|
1569 | 1569 | Your handler must return a structured traceback (a list of strings), |
|
1570 | 1570 | or None. |
|
1571 | 1571 | |
|
1572 | 1572 | This will be made into an instance method (via types.MethodType) |
|
1573 | 1573 | of IPython itself, and it will be called if any of the exceptions |
|
1574 | 1574 | listed in the exc_tuple are caught. If the handler is None, an |
|
1575 | 1575 | internal basic one is used, which just prints basic info. |
|
1576 | 1576 | |
|
1577 | 1577 | To protect IPython from crashes, if your handler ever raises an |
|
1578 | 1578 | exception or returns an invalid result, it will be immediately |
|
1579 | 1579 | disabled. |
|
1580 | 1580 | |
|
1581 | 1581 | WARNING: by putting in your own exception handler into IPython's main |
|
1582 | 1582 | execution loop, you run a very good chance of nasty crashes. This |
|
1583 | 1583 | facility should only be used if you really know what you are doing.""" |
|
1584 | 1584 | |
|
1585 | 1585 | assert type(exc_tuple)==type(()) , \ |
|
1586 | 1586 | "The custom exceptions must be given AS A TUPLE." |
|
1587 | 1587 | |
|
1588 | 1588 | def dummy_handler(self,etype,value,tb,tb_offset=None): |
|
1589 | 1589 | print('*** Simple custom exception handler ***') |
|
1590 | 1590 | print('Exception type :',etype) |
|
1591 | 1591 | print('Exception value:',value) |
|
1592 | 1592 | print('Traceback :',tb) |
|
1593 | 1593 | #print 'Source code :','\n'.join(self.buffer) |
|
1594 | 1594 | |
|
1595 | 1595 | def validate_stb(stb): |
|
1596 | 1596 | """validate structured traceback return type |
|
1597 | 1597 | |
|
1598 | 1598 | return type of CustomTB *should* be a list of strings, but allow |
|
1599 | 1599 | single strings or None, which are harmless. |
|
1600 | 1600 | |
|
1601 | 1601 | This function will *always* return a list of strings, |
|
1602 | 1602 | and will raise a TypeError if stb is inappropriate. |
|
1603 | 1603 | """ |
|
1604 | 1604 | msg = "CustomTB must return list of strings, not %r" % stb |
|
1605 | 1605 | if stb is None: |
|
1606 | 1606 | return [] |
|
1607 | 1607 | elif isinstance(stb, basestring): |
|
1608 | 1608 | return [stb] |
|
1609 | 1609 | elif not isinstance(stb, list): |
|
1610 | 1610 | raise TypeError(msg) |
|
1611 | 1611 | # it's a list |
|
1612 | 1612 | for line in stb: |
|
1613 | 1613 | # check every element |
|
1614 | 1614 | if not isinstance(line, basestring): |
|
1615 | 1615 | raise TypeError(msg) |
|
1616 | 1616 | return stb |
|
1617 | 1617 | |
|
1618 | 1618 | if handler is None: |
|
1619 | 1619 | wrapped = dummy_handler |
|
1620 | 1620 | else: |
|
1621 | 1621 | def wrapped(self,etype,value,tb,tb_offset=None): |
|
1622 | 1622 | """wrap CustomTB handler, to protect IPython from user code |
|
1623 | 1623 | |
|
1624 | 1624 | This makes it harder (but not impossible) for custom exception |
|
1625 | 1625 | handlers to crash IPython. |
|
1626 | 1626 | """ |
|
1627 | 1627 | try: |
|
1628 | 1628 | stb = handler(self,etype,value,tb,tb_offset=tb_offset) |
|
1629 | 1629 | return validate_stb(stb) |
|
1630 | 1630 | except: |
|
1631 | 1631 | # clear custom handler immediately |
|
1632 | 1632 | self.set_custom_exc((), None) |
|
1633 | 1633 | print("Custom TB Handler failed, unregistering", file=io.stderr) |
|
1634 | 1634 | # show the exception in handler first |
|
1635 | 1635 | stb = self.InteractiveTB.structured_traceback(*sys.exc_info()) |
|
1636 | 1636 | print(self.InteractiveTB.stb2text(stb), file=io.stdout) |
|
1637 | 1637 | print("The original exception:", file=io.stdout) |
|
1638 | 1638 | stb = self.InteractiveTB.structured_traceback( |
|
1639 | 1639 | (etype,value,tb), tb_offset=tb_offset |
|
1640 | 1640 | ) |
|
1641 | 1641 | return stb |
|
1642 | 1642 | |
|
1643 | 1643 | self.CustomTB = types.MethodType(wrapped,self) |
|
1644 | 1644 | self.custom_exceptions = exc_tuple |
|
1645 | 1645 | |
|
1646 | 1646 | def excepthook(self, etype, value, tb): |
|
1647 | 1647 | """One more defense for GUI apps that call sys.excepthook. |
|
1648 | 1648 | |
|
1649 | 1649 | GUI frameworks like wxPython trap exceptions and call |
|
1650 | 1650 | sys.excepthook themselves. I guess this is a feature that |
|
1651 | 1651 | enables them to keep running after exceptions that would |
|
1652 | 1652 | otherwise kill their mainloop. This is a bother for IPython |
|
1653 | 1653 | which excepts to catch all of the program exceptions with a try: |
|
1654 | 1654 | except: statement. |
|
1655 | 1655 | |
|
1656 | 1656 | Normally, IPython sets sys.excepthook to a CrashHandler instance, so if |
|
1657 | 1657 | any app directly invokes sys.excepthook, it will look to the user like |
|
1658 | 1658 | IPython crashed. In order to work around this, we can disable the |
|
1659 | 1659 | CrashHandler and replace it with this excepthook instead, which prints a |
|
1660 | 1660 | regular traceback using our InteractiveTB. In this fashion, apps which |
|
1661 | 1661 | call sys.excepthook will generate a regular-looking exception from |
|
1662 | 1662 | IPython, and the CrashHandler will only be triggered by real IPython |
|
1663 | 1663 | crashes. |
|
1664 | 1664 | |
|
1665 | 1665 | This hook should be used sparingly, only in places which are not likely |
|
1666 | 1666 | to be true IPython errors. |
|
1667 | 1667 | """ |
|
1668 | 1668 | self.showtraceback((etype,value,tb),tb_offset=0) |
|
1669 | 1669 | |
|
1670 | 1670 | def _get_exc_info(self, exc_tuple=None): |
|
1671 | 1671 | """get exc_info from a given tuple, sys.exc_info() or sys.last_type etc. |
|
1672 | 1672 | |
|
1673 | 1673 | Ensures sys.last_type,value,traceback hold the exc_info we found, |
|
1674 | 1674 | from whichever source. |
|
1675 | 1675 | |
|
1676 | 1676 | raises ValueError if none of these contain any information |
|
1677 | 1677 | """ |
|
1678 | 1678 | if exc_tuple is None: |
|
1679 | 1679 | etype, value, tb = sys.exc_info() |
|
1680 | 1680 | else: |
|
1681 | 1681 | etype, value, tb = exc_tuple |
|
1682 | 1682 | |
|
1683 | 1683 | if etype is None: |
|
1684 | 1684 | if hasattr(sys, 'last_type'): |
|
1685 | 1685 | etype, value, tb = sys.last_type, sys.last_value, \ |
|
1686 | 1686 | sys.last_traceback |
|
1687 | 1687 | |
|
1688 | 1688 | if etype is None: |
|
1689 | 1689 | raise ValueError("No exception to find") |
|
1690 | 1690 | |
|
1691 | 1691 | # Now store the exception info in sys.last_type etc. |
|
1692 | 1692 | # WARNING: these variables are somewhat deprecated and not |
|
1693 | 1693 | # necessarily safe to use in a threaded environment, but tools |
|
1694 | 1694 | # like pdb depend on their existence, so let's set them. If we |
|
1695 | 1695 | # find problems in the field, we'll need to revisit their use. |
|
1696 | 1696 | sys.last_type = etype |
|
1697 | 1697 | sys.last_value = value |
|
1698 | 1698 | sys.last_traceback = tb |
|
1699 | 1699 | |
|
1700 | 1700 | return etype, value, tb |
|
1701 | 1701 | |
|
1702 | 1702 | |
|
1703 | 1703 | def showtraceback(self,exc_tuple = None,filename=None,tb_offset=None, |
|
1704 | 1704 | exception_only=False): |
|
1705 | 1705 | """Display the exception that just occurred. |
|
1706 | 1706 | |
|
1707 | 1707 | If nothing is known about the exception, this is the method which |
|
1708 | 1708 | should be used throughout the code for presenting user tracebacks, |
|
1709 | 1709 | rather than directly invoking the InteractiveTB object. |
|
1710 | 1710 | |
|
1711 | 1711 | A specific showsyntaxerror() also exists, but this method can take |
|
1712 | 1712 | care of calling it if needed, so unless you are explicitly catching a |
|
1713 | 1713 | SyntaxError exception, don't try to analyze the stack manually and |
|
1714 | 1714 | simply call this method.""" |
|
1715 | 1715 | |
|
1716 | 1716 | try: |
|
1717 | 1717 | try: |
|
1718 | 1718 | etype, value, tb = self._get_exc_info(exc_tuple) |
|
1719 | 1719 | except ValueError: |
|
1720 | 1720 | self.write_err('No traceback available to show.\n') |
|
1721 | 1721 | return |
|
1722 | 1722 | |
|
1723 | 1723 | if issubclass(etype, SyntaxError): |
|
1724 | 1724 | # Though this won't be called by syntax errors in the input |
|
1725 | 1725 | # line, there may be SyntaxError cases with imported code. |
|
1726 | 1726 | self.showsyntaxerror(filename) |
|
1727 | 1727 | elif etype is UsageError: |
|
1728 | 1728 | self.write_err("UsageError: %s" % value) |
|
1729 | 1729 | else: |
|
1730 | 1730 | if exception_only: |
|
1731 | 1731 | stb = ['An exception has occurred, use %tb to see ' |
|
1732 | 1732 | 'the full traceback.\n'] |
|
1733 | 1733 | stb.extend(self.InteractiveTB.get_exception_only(etype, |
|
1734 | 1734 | value)) |
|
1735 | 1735 | else: |
|
1736 | 1736 | try: |
|
1737 | 1737 | # Exception classes can customise their traceback - we |
|
1738 | 1738 | # use this in IPython.parallel for exceptions occurring |
|
1739 | 1739 | # in the engines. This should return a list of strings. |
|
1740 | 1740 | stb = value._render_traceback_() |
|
1741 | 1741 | except Exception: |
|
1742 | 1742 | stb = self.InteractiveTB.structured_traceback(etype, |
|
1743 | 1743 | value, tb, tb_offset=tb_offset) |
|
1744 | 1744 | |
|
1745 | 1745 | self._showtraceback(etype, value, stb) |
|
1746 | 1746 | if self.call_pdb: |
|
1747 | 1747 | # drop into debugger |
|
1748 | 1748 | self.debugger(force=True) |
|
1749 | 1749 | return |
|
1750 | 1750 | |
|
1751 | 1751 | # Actually show the traceback |
|
1752 | 1752 | self._showtraceback(etype, value, stb) |
|
1753 | 1753 | |
|
1754 | 1754 | except KeyboardInterrupt: |
|
1755 | 1755 | self.write_err("\nKeyboardInterrupt\n") |
|
1756 | 1756 | |
|
1757 | 1757 | def _showtraceback(self, etype, evalue, stb): |
|
1758 | 1758 | """Actually show a traceback. |
|
1759 | 1759 | |
|
1760 | 1760 | Subclasses may override this method to put the traceback on a different |
|
1761 | 1761 | place, like a side channel. |
|
1762 | 1762 | """ |
|
1763 | 1763 | print(self.InteractiveTB.stb2text(stb), file=io.stdout) |
|
1764 | 1764 | |
|
1765 | 1765 | def showsyntaxerror(self, filename=None): |
|
1766 | 1766 | """Display the syntax error that just occurred. |
|
1767 | 1767 | |
|
1768 | 1768 | This doesn't display a stack trace because there isn't one. |
|
1769 | 1769 | |
|
1770 | 1770 | If a filename is given, it is stuffed in the exception instead |
|
1771 | 1771 | of what was there before (because Python's parser always uses |
|
1772 | 1772 | "<string>" when reading from a string). |
|
1773 | 1773 | """ |
|
1774 | 1774 | etype, value, last_traceback = self._get_exc_info() |
|
1775 | 1775 | |
|
1776 | 1776 | if filename and issubclass(etype, SyntaxError): |
|
1777 | 1777 | try: |
|
1778 | 1778 | value.filename = filename |
|
1779 | 1779 | except: |
|
1780 | 1780 | # Not the format we expect; leave it alone |
|
1781 | 1781 | pass |
|
1782 | 1782 | |
|
1783 | 1783 | stb = self.SyntaxTB.structured_traceback(etype, value, []) |
|
1784 | 1784 | self._showtraceback(etype, value, stb) |
|
1785 | 1785 | |
|
1786 | 1786 | # This is overridden in TerminalInteractiveShell to show a message about |
|
1787 | 1787 | # the %paste magic. |
|
1788 | 1788 | def showindentationerror(self): |
|
1789 | 1789 | """Called by run_cell when there's an IndentationError in code entered |
|
1790 | 1790 | at the prompt. |
|
1791 | 1791 | |
|
1792 | 1792 | This is overridden in TerminalInteractiveShell to show a message about |
|
1793 | 1793 | the %paste magic.""" |
|
1794 | 1794 | self.showsyntaxerror() |
|
1795 | 1795 | |
|
1796 | 1796 | #------------------------------------------------------------------------- |
|
1797 | 1797 | # Things related to readline |
|
1798 | 1798 | #------------------------------------------------------------------------- |
|
1799 | 1799 | |
|
1800 | 1800 | def init_readline(self): |
|
1801 | 1801 | """Command history completion/saving/reloading.""" |
|
1802 | 1802 | |
|
1803 | 1803 | if self.readline_use: |
|
1804 | 1804 | import IPython.utils.rlineimpl as readline |
|
1805 | 1805 | |
|
1806 | 1806 | self.rl_next_input = None |
|
1807 | 1807 | self.rl_do_indent = False |
|
1808 | 1808 | |
|
1809 | 1809 | if not self.readline_use or not readline.have_readline: |
|
1810 | 1810 | self.has_readline = False |
|
1811 | 1811 | self.readline = None |
|
1812 | 1812 | # Set a number of methods that depend on readline to be no-op |
|
1813 | 1813 | self.readline_no_record = no_op_context |
|
1814 | 1814 | self.set_readline_completer = no_op |
|
1815 | 1815 | self.set_custom_completer = no_op |
|
1816 | 1816 | if self.readline_use: |
|
1817 | 1817 | warn('Readline services not available or not loaded.') |
|
1818 | 1818 | else: |
|
1819 | 1819 | self.has_readline = True |
|
1820 | 1820 | self.readline = readline |
|
1821 | 1821 | sys.modules['readline'] = readline |
|
1822 | 1822 | |
|
1823 | 1823 | # Platform-specific configuration |
|
1824 | 1824 | if os.name == 'nt': |
|
1825 | 1825 | # FIXME - check with Frederick to see if we can harmonize |
|
1826 | 1826 | # naming conventions with pyreadline to avoid this |
|
1827 | 1827 | # platform-dependent check |
|
1828 | 1828 | self.readline_startup_hook = readline.set_pre_input_hook |
|
1829 | 1829 | else: |
|
1830 | 1830 | self.readline_startup_hook = readline.set_startup_hook |
|
1831 | 1831 | |
|
1832 | 1832 | # Load user's initrc file (readline config) |
|
1833 | 1833 | # Or if libedit is used, load editrc. |
|
1834 | 1834 | inputrc_name = os.environ.get('INPUTRC') |
|
1835 | 1835 | if inputrc_name is None: |
|
1836 | 1836 | inputrc_name = '.inputrc' |
|
1837 | 1837 | if readline.uses_libedit: |
|
1838 | 1838 | inputrc_name = '.editrc' |
|
1839 | 1839 | inputrc_name = os.path.join(self.home_dir, inputrc_name) |
|
1840 | 1840 | if os.path.isfile(inputrc_name): |
|
1841 | 1841 | try: |
|
1842 | 1842 | readline.read_init_file(inputrc_name) |
|
1843 | 1843 | except: |
|
1844 | 1844 | warn('Problems reading readline initialization file <%s>' |
|
1845 | 1845 | % inputrc_name) |
|
1846 | 1846 | |
|
1847 | 1847 | # Configure readline according to user's prefs |
|
1848 | 1848 | # This is only done if GNU readline is being used. If libedit |
|
1849 | 1849 | # is being used (as on Leopard) the readline config is |
|
1850 | 1850 | # not run as the syntax for libedit is different. |
|
1851 | 1851 | if not readline.uses_libedit: |
|
1852 | 1852 | for rlcommand in self.readline_parse_and_bind: |
|
1853 | 1853 | #print "loading rl:",rlcommand # dbg |
|
1854 | 1854 | readline.parse_and_bind(rlcommand) |
|
1855 | 1855 | |
|
1856 | 1856 | # Remove some chars from the delimiters list. If we encounter |
|
1857 | 1857 | # unicode chars, discard them. |
|
1858 | 1858 | delims = readline.get_completer_delims() |
|
1859 | 1859 | if not py3compat.PY3: |
|
1860 | 1860 | delims = delims.encode("ascii", "ignore") |
|
1861 | 1861 | for d in self.readline_remove_delims: |
|
1862 | 1862 | delims = delims.replace(d, "") |
|
1863 | 1863 | delims = delims.replace(ESC_MAGIC, '') |
|
1864 | 1864 | readline.set_completer_delims(delims) |
|
1865 | 1865 | # Store these so we can restore them if something like rpy2 modifies |
|
1866 | 1866 | # them. |
|
1867 | 1867 | self.readline_delims = delims |
|
1868 | 1868 | # otherwise we end up with a monster history after a while: |
|
1869 | 1869 | readline.set_history_length(self.history_length) |
|
1870 | 1870 | |
|
1871 | 1871 | self.refill_readline_hist() |
|
1872 | 1872 | self.readline_no_record = ReadlineNoRecord(self) |
|
1873 | 1873 | |
|
1874 | 1874 | # Configure auto-indent for all platforms |
|
1875 | 1875 | self.set_autoindent(self.autoindent) |
|
1876 | 1876 | |
|
1877 | 1877 | def refill_readline_hist(self): |
|
1878 | 1878 | # Load the last 1000 lines from history |
|
1879 | 1879 | self.readline.clear_history() |
|
1880 | 1880 | stdin_encoding = sys.stdin.encoding or "utf-8" |
|
1881 | 1881 | last_cell = u"" |
|
1882 | 1882 | for _, _, cell in self.history_manager.get_tail(1000, |
|
1883 | 1883 | include_latest=True): |
|
1884 | 1884 | # Ignore blank lines and consecutive duplicates |
|
1885 | 1885 | cell = cell.rstrip() |
|
1886 | 1886 | if cell and (cell != last_cell): |
|
1887 | 1887 | if self.multiline_history: |
|
1888 | 1888 | self.readline.add_history(py3compat.unicode_to_str(cell, |
|
1889 | 1889 | stdin_encoding)) |
|
1890 | 1890 | else: |
|
1891 | 1891 | for line in cell.splitlines(): |
|
1892 | 1892 | self.readline.add_history(py3compat.unicode_to_str(line, |
|
1893 | 1893 | stdin_encoding)) |
|
1894 | 1894 | last_cell = cell |
|
1895 | 1895 | |
|
1896 | 1896 | @skip_doctest |
|
1897 | 1897 | def set_next_input(self, s): |
|
1898 | 1898 | """ Sets the 'default' input string for the next command line. |
|
1899 | 1899 | |
|
1900 | 1900 | Requires readline. |
|
1901 | 1901 | |
|
1902 | 1902 | Example:: |
|
1903 | 1903 | |
|
1904 | 1904 | In [1]: _ip.set_next_input("Hello Word") |
|
1905 | 1905 | In [2]: Hello Word_ # cursor is here |
|
1906 | 1906 | """ |
|
1907 | 1907 | self.rl_next_input = py3compat.cast_bytes_py2(s) |
|
1908 | 1908 | |
|
1909 | 1909 | # Maybe move this to the terminal subclass? |
|
1910 | 1910 | def pre_readline(self): |
|
1911 | 1911 | """readline hook to be used at the start of each line. |
|
1912 | 1912 | |
|
1913 | 1913 | Currently it handles auto-indent only.""" |
|
1914 | 1914 | |
|
1915 | 1915 | if self.rl_do_indent: |
|
1916 | 1916 | self.readline.insert_text(self._indent_current_str()) |
|
1917 | 1917 | if self.rl_next_input is not None: |
|
1918 | 1918 | self.readline.insert_text(self.rl_next_input) |
|
1919 | 1919 | self.rl_next_input = None |
|
1920 | 1920 | |
|
1921 | 1921 | def _indent_current_str(self): |
|
1922 | 1922 | """return the current level of indentation as a string""" |
|
1923 | 1923 | return self.input_splitter.indent_spaces * ' ' |
|
1924 | 1924 | |
|
1925 | 1925 | #------------------------------------------------------------------------- |
|
1926 | 1926 | # Things related to text completion |
|
1927 | 1927 | #------------------------------------------------------------------------- |
|
1928 | 1928 | |
|
1929 | 1929 | def init_completer(self): |
|
1930 | 1930 | """Initialize the completion machinery. |
|
1931 | 1931 | |
|
1932 | 1932 | This creates completion machinery that can be used by client code, |
|
1933 | 1933 | either interactively in-process (typically triggered by the readline |
|
1934 | 1934 | library), programatically (such as in test suites) or out-of-prcess |
|
1935 | 1935 | (typically over the network by remote frontends). |
|
1936 | 1936 | """ |
|
1937 | 1937 | from IPython.core.completer import IPCompleter |
|
1938 | 1938 | from IPython.core.completerlib import (module_completer, |
|
1939 | 1939 | magic_run_completer, cd_completer, reset_completer) |
|
1940 | 1940 | |
|
1941 | 1941 | self.Completer = IPCompleter(shell=self, |
|
1942 | 1942 | namespace=self.user_ns, |
|
1943 | 1943 | global_namespace=self.user_global_ns, |
|
1944 | 1944 | alias_table=self.alias_manager.alias_table, |
|
1945 | 1945 | use_readline=self.has_readline, |
|
1946 | 1946 | config=self.config, |
|
1947 | 1947 | ) |
|
1948 | 1948 | self.configurables.append(self.Completer) |
|
1949 | 1949 | |
|
1950 | 1950 | # Add custom completers to the basic ones built into IPCompleter |
|
1951 | 1951 | sdisp = self.strdispatchers.get('complete_command', StrDispatch()) |
|
1952 | 1952 | self.strdispatchers['complete_command'] = sdisp |
|
1953 | 1953 | self.Completer.custom_completers = sdisp |
|
1954 | 1954 | |
|
1955 | 1955 | self.set_hook('complete_command', module_completer, str_key = 'import') |
|
1956 | 1956 | self.set_hook('complete_command', module_completer, str_key = 'from') |
|
1957 | 1957 | self.set_hook('complete_command', magic_run_completer, str_key = '%run') |
|
1958 | 1958 | self.set_hook('complete_command', cd_completer, str_key = '%cd') |
|
1959 | 1959 | self.set_hook('complete_command', reset_completer, str_key = '%reset') |
|
1960 | 1960 | |
|
1961 | 1961 | # Only configure readline if we truly are using readline. IPython can |
|
1962 | 1962 | # do tab-completion over the network, in GUIs, etc, where readline |
|
1963 | 1963 | # itself may be absent |
|
1964 | 1964 | if self.has_readline: |
|
1965 | 1965 | self.set_readline_completer() |
|
1966 | 1966 | |
|
1967 | 1967 | def complete(self, text, line=None, cursor_pos=None): |
|
1968 | 1968 | """Return the completed text and a list of completions. |
|
1969 | 1969 | |
|
1970 | 1970 | Parameters |
|
1971 | 1971 | ---------- |
|
1972 | 1972 | |
|
1973 | 1973 | text : string |
|
1974 | 1974 | A string of text to be completed on. It can be given as empty and |
|
1975 | 1975 | instead a line/position pair are given. In this case, the |
|
1976 | 1976 | completer itself will split the line like readline does. |
|
1977 | 1977 | |
|
1978 | 1978 | line : string, optional |
|
1979 | 1979 | The complete line that text is part of. |
|
1980 | 1980 | |
|
1981 | 1981 | cursor_pos : int, optional |
|
1982 | 1982 | The position of the cursor on the input line. |
|
1983 | 1983 | |
|
1984 | 1984 | Returns |
|
1985 | 1985 | ------- |
|
1986 | 1986 | text : string |
|
1987 | 1987 | The actual text that was completed. |
|
1988 | 1988 | |
|
1989 | 1989 | matches : list |
|
1990 | 1990 | A sorted list with all possible completions. |
|
1991 | 1991 | |
|
1992 | 1992 | The optional arguments allow the completion to take more context into |
|
1993 | 1993 | account, and are part of the low-level completion API. |
|
1994 | 1994 | |
|
1995 | 1995 | This is a wrapper around the completion mechanism, similar to what |
|
1996 | 1996 | readline does at the command line when the TAB key is hit. By |
|
1997 | 1997 | exposing it as a method, it can be used by other non-readline |
|
1998 | 1998 | environments (such as GUIs) for text completion. |
|
1999 | 1999 | |
|
2000 | 2000 | Simple usage example: |
|
2001 | 2001 | |
|
2002 | 2002 | In [1]: x = 'hello' |
|
2003 | 2003 | |
|
2004 | 2004 | In [2]: _ip.complete('x.l') |
|
2005 | 2005 | Out[2]: ('x.l', ['x.ljust', 'x.lower', 'x.lstrip']) |
|
2006 | 2006 | """ |
|
2007 | 2007 | |
|
2008 | 2008 | # Inject names into __builtin__ so we can complete on the added names. |
|
2009 | 2009 | with self.builtin_trap: |
|
2010 | 2010 | return self.Completer.complete(text, line, cursor_pos) |
|
2011 | 2011 | |
|
2012 | 2012 | def set_custom_completer(self, completer, pos=0): |
|
2013 | 2013 | """Adds a new custom completer function. |
|
2014 | 2014 | |
|
2015 | 2015 | The position argument (defaults to 0) is the index in the completers |
|
2016 | 2016 | list where you want the completer to be inserted.""" |
|
2017 | 2017 | |
|
2018 | 2018 | newcomp = types.MethodType(completer,self.Completer) |
|
2019 | 2019 | self.Completer.matchers.insert(pos,newcomp) |
|
2020 | 2020 | |
|
2021 | 2021 | def set_readline_completer(self): |
|
2022 | 2022 | """Reset readline's completer to be our own.""" |
|
2023 | 2023 | self.readline.set_completer(self.Completer.rlcomplete) |
|
2024 | 2024 | |
|
2025 | 2025 | def set_completer_frame(self, frame=None): |
|
2026 | 2026 | """Set the frame of the completer.""" |
|
2027 | 2027 | if frame: |
|
2028 | 2028 | self.Completer.namespace = frame.f_locals |
|
2029 | 2029 | self.Completer.global_namespace = frame.f_globals |
|
2030 | 2030 | else: |
|
2031 | 2031 | self.Completer.namespace = self.user_ns |
|
2032 | 2032 | self.Completer.global_namespace = self.user_global_ns |
|
2033 | 2033 | |
|
2034 | 2034 | #------------------------------------------------------------------------- |
|
2035 | 2035 | # Things related to magics |
|
2036 | 2036 | #------------------------------------------------------------------------- |
|
2037 | 2037 | |
|
2038 | 2038 | def init_magics(self): |
|
2039 | 2039 | from IPython.core import magics as m |
|
2040 | 2040 | self.magics_manager = magic.MagicsManager(shell=self, |
|
2041 | 2041 | config=self.config, |
|
2042 | 2042 | user_magics=m.UserMagics(self)) |
|
2043 | 2043 | self.configurables.append(self.magics_manager) |
|
2044 | 2044 | |
|
2045 | 2045 | # Expose as public API from the magics manager |
|
2046 | 2046 | self.register_magics = self.magics_manager.register |
|
2047 | 2047 | self.register_magic_function = self.magics_manager.register_function |
|
2048 | 2048 | self.define_magic = self.magics_manager.define_magic |
|
2049 | 2049 | |
|
2050 | 2050 | self.register_magics(m.AutoMagics, m.BasicMagics, m.CodeMagics, |
|
2051 | 2051 | m.ConfigMagics, m.DeprecatedMagics, m.DisplayMagics, m.ExecutionMagics, |
|
2052 | 2052 | m.ExtensionMagics, m.HistoryMagics, m.LoggingMagics, |
|
2053 | 2053 | m.NamespaceMagics, m.OSMagics, m.PylabMagics, m.ScriptMagics, |
|
2054 | 2054 | ) |
|
2055 | 2055 | |
|
2056 | 2056 | # Register Magic Aliases |
|
2057 | 2057 | mman = self.magics_manager |
|
2058 | 2058 | # FIXME: magic aliases should be defined by the Magics classes |
|
2059 | 2059 | # or in MagicsManager, not here |
|
2060 | 2060 | mman.register_alias('ed', 'edit') |
|
2061 | 2061 | mman.register_alias('hist', 'history') |
|
2062 | 2062 | mman.register_alias('rep', 'recall') |
|
2063 | 2063 | mman.register_alias('SVG', 'svg', 'cell') |
|
2064 | 2064 | mman.register_alias('HTML', 'html', 'cell') |
|
2065 | 2065 | mman.register_alias('file', 'writefile', 'cell') |
|
2066 | 2066 | |
|
2067 | 2067 | # FIXME: Move the color initialization to the DisplayHook, which |
|
2068 | 2068 | # should be split into a prompt manager and displayhook. We probably |
|
2069 | 2069 | # even need a centralize colors management object. |
|
2070 | 2070 | self.magic('colors %s' % self.colors) |
|
2071 | 2071 | |
|
2072 | 2072 | def run_line_magic(self, magic_name, line): |
|
2073 | 2073 | """Execute the given line magic. |
|
2074 | 2074 | |
|
2075 | 2075 | Parameters |
|
2076 | 2076 | ---------- |
|
2077 | 2077 | magic_name : str |
|
2078 | 2078 | Name of the desired magic function, without '%' prefix. |
|
2079 | 2079 | |
|
2080 | 2080 | line : str |
|
2081 | 2081 | The rest of the input line as a single string. |
|
2082 | 2082 | """ |
|
2083 | 2083 | fn = self.find_line_magic(magic_name) |
|
2084 | 2084 | if fn is None: |
|
2085 | 2085 | cm = self.find_cell_magic(magic_name) |
|
2086 | 2086 | etpl = "Line magic function `%%%s` not found%s." |
|
2087 | 2087 | extra = '' if cm is None else (' (But cell magic `%%%%%s` exists, ' |
|
2088 | 2088 | 'did you mean that instead?)' % magic_name ) |
|
2089 | 2089 | error(etpl % (magic_name, extra)) |
|
2090 | 2090 | else: |
|
2091 | 2091 | # Note: this is the distance in the stack to the user's frame. |
|
2092 | 2092 | # This will need to be updated if the internal calling logic gets |
|
2093 | 2093 | # refactored, or else we'll be expanding the wrong variables. |
|
2094 | 2094 | stack_depth = 2 |
|
2095 | 2095 | magic_arg_s = self.var_expand(line, stack_depth) |
|
2096 | 2096 | # Put magic args in a list so we can call with f(*a) syntax |
|
2097 | 2097 | args = [magic_arg_s] |
|
2098 | 2098 | kwargs = {} |
|
2099 | 2099 | # Grab local namespace if we need it: |
|
2100 | 2100 | if getattr(fn, "needs_local_scope", False): |
|
2101 | 2101 | kwargs['local_ns'] = sys._getframe(stack_depth).f_locals |
|
2102 | 2102 | with self.builtin_trap: |
|
2103 | 2103 | result = fn(*args,**kwargs) |
|
2104 | 2104 | return result |
|
2105 | 2105 | |
|
2106 | 2106 | def run_cell_magic(self, magic_name, line, cell): |
|
2107 | 2107 | """Execute the given cell magic. |
|
2108 | 2108 | |
|
2109 | 2109 | Parameters |
|
2110 | 2110 | ---------- |
|
2111 | 2111 | magic_name : str |
|
2112 | 2112 | Name of the desired magic function, without '%' prefix. |
|
2113 | 2113 | |
|
2114 | 2114 | line : str |
|
2115 | 2115 | The rest of the first input line as a single string. |
|
2116 | 2116 | |
|
2117 | 2117 | cell : str |
|
2118 | 2118 | The body of the cell as a (possibly multiline) string. |
|
2119 | 2119 | """ |
|
2120 | 2120 | fn = self.find_cell_magic(magic_name) |
|
2121 | 2121 | if fn is None: |
|
2122 | 2122 | lm = self.find_line_magic(magic_name) |
|
2123 | 2123 | etpl = "Cell magic `%%{0}` not found{1}." |
|
2124 | 2124 | extra = '' if lm is None else (' (But line magic `%{0}` exists, ' |
|
2125 | 2125 | 'did you mean that instead?)'.format(magic_name)) |
|
2126 | 2126 | error(etpl.format(magic_name, extra)) |
|
2127 | 2127 | elif cell == '': |
|
2128 | 2128 | message = '%%{0} is a cell magic, but the cell body is empty.'.format(magic_name) |
|
2129 | 2129 | if self.find_line_magic(magic_name) is not None: |
|
2130 | 2130 | message += ' Did you mean the line magic %{0} (single %)?'.format(magic_name) |
|
2131 | 2131 | raise UsageError(message) |
|
2132 | 2132 | else: |
|
2133 | 2133 | # Note: this is the distance in the stack to the user's frame. |
|
2134 | 2134 | # This will need to be updated if the internal calling logic gets |
|
2135 | 2135 | # refactored, or else we'll be expanding the wrong variables. |
|
2136 | 2136 | stack_depth = 2 |
|
2137 | 2137 | magic_arg_s = self.var_expand(line, stack_depth) |
|
2138 | 2138 | with self.builtin_trap: |
|
2139 | 2139 | result = fn(magic_arg_s, cell) |
|
2140 | 2140 | return result |
|
2141 | 2141 | |
|
2142 | 2142 | def find_line_magic(self, magic_name): |
|
2143 | 2143 | """Find and return a line magic by name. |
|
2144 | 2144 | |
|
2145 | 2145 | Returns None if the magic isn't found.""" |
|
2146 | 2146 | return self.magics_manager.magics['line'].get(magic_name) |
|
2147 | 2147 | |
|
2148 | 2148 | def find_cell_magic(self, magic_name): |
|
2149 | 2149 | """Find and return a cell magic by name. |
|
2150 | 2150 | |
|
2151 | 2151 | Returns None if the magic isn't found.""" |
|
2152 | 2152 | return self.magics_manager.magics['cell'].get(magic_name) |
|
2153 | 2153 | |
|
2154 | 2154 | def find_magic(self, magic_name, magic_kind='line'): |
|
2155 | 2155 | """Find and return a magic of the given type by name. |
|
2156 | 2156 | |
|
2157 | 2157 | Returns None if the magic isn't found.""" |
|
2158 | 2158 | return self.magics_manager.magics[magic_kind].get(magic_name) |
|
2159 | 2159 | |
|
2160 | 2160 | def magic(self, arg_s): |
|
2161 | 2161 | """DEPRECATED. Use run_line_magic() instead. |
|
2162 | 2162 | |
|
2163 | 2163 | Call a magic function by name. |
|
2164 | 2164 | |
|
2165 | 2165 | Input: a string containing the name of the magic function to call and |
|
2166 | 2166 | any additional arguments to be passed to the magic. |
|
2167 | 2167 | |
|
2168 | 2168 | magic('name -opt foo bar') is equivalent to typing at the ipython |
|
2169 | 2169 | prompt: |
|
2170 | 2170 | |
|
2171 | 2171 | In[1]: %name -opt foo bar |
|
2172 | 2172 | |
|
2173 | 2173 | To call a magic without arguments, simply use magic('name'). |
|
2174 | 2174 | |
|
2175 | 2175 | This provides a proper Python function to call IPython's magics in any |
|
2176 | 2176 | valid Python code you can type at the interpreter, including loops and |
|
2177 | 2177 | compound statements. |
|
2178 | 2178 | """ |
|
2179 | 2179 | # TODO: should we issue a loud deprecation warning here? |
|
2180 | 2180 | magic_name, _, magic_arg_s = arg_s.partition(' ') |
|
2181 | 2181 | magic_name = magic_name.lstrip(prefilter.ESC_MAGIC) |
|
2182 | 2182 | return self.run_line_magic(magic_name, magic_arg_s) |
|
2183 | 2183 | |
|
2184 | 2184 | #------------------------------------------------------------------------- |
|
2185 | 2185 | # Things related to macros |
|
2186 | 2186 | #------------------------------------------------------------------------- |
|
2187 | 2187 | |
|
2188 | 2188 | def define_macro(self, name, themacro): |
|
2189 | 2189 | """Define a new macro |
|
2190 | 2190 | |
|
2191 | 2191 | Parameters |
|
2192 | 2192 | ---------- |
|
2193 | 2193 | name : str |
|
2194 | 2194 | The name of the macro. |
|
2195 | 2195 | themacro : str or Macro |
|
2196 | 2196 | The action to do upon invoking the macro. If a string, a new |
|
2197 | 2197 | Macro object is created by passing the string to it. |
|
2198 | 2198 | """ |
|
2199 | 2199 | |
|
2200 | 2200 | from IPython.core import macro |
|
2201 | 2201 | |
|
2202 | 2202 | if isinstance(themacro, basestring): |
|
2203 | 2203 | themacro = macro.Macro(themacro) |
|
2204 | 2204 | if not isinstance(themacro, macro.Macro): |
|
2205 | 2205 | raise ValueError('A macro must be a string or a Macro instance.') |
|
2206 | 2206 | self.user_ns[name] = themacro |
|
2207 | 2207 | |
|
2208 | 2208 | #------------------------------------------------------------------------- |
|
2209 | 2209 | # Things related to the running of system commands |
|
2210 | 2210 | #------------------------------------------------------------------------- |
|
2211 | 2211 | |
|
2212 | 2212 | def system_piped(self, cmd): |
|
2213 | 2213 | """Call the given cmd in a subprocess, piping stdout/err |
|
2214 | 2214 | |
|
2215 | 2215 | Parameters |
|
2216 | 2216 | ---------- |
|
2217 | 2217 | cmd : str |
|
2218 | 2218 | Command to execute (can not end in '&', as background processes are |
|
2219 | 2219 | not supported. Should not be a command that expects input |
|
2220 | 2220 | other than simple text. |
|
2221 | 2221 | """ |
|
2222 | 2222 | if cmd.rstrip().endswith('&'): |
|
2223 | 2223 | # this is *far* from a rigorous test |
|
2224 | 2224 | # We do not support backgrounding processes because we either use |
|
2225 | 2225 | # pexpect or pipes to read from. Users can always just call |
|
2226 | 2226 | # os.system() or use ip.system=ip.system_raw |
|
2227 | 2227 | # if they really want a background process. |
|
2228 | 2228 | raise OSError("Background processes not supported.") |
|
2229 | 2229 | |
|
2230 | 2230 | # we explicitly do NOT return the subprocess status code, because |
|
2231 | 2231 | # a non-None value would trigger :func:`sys.displayhook` calls. |
|
2232 | 2232 | # Instead, we store the exit_code in user_ns. |
|
2233 | 2233 | self.user_ns['_exit_code'] = system(self.var_expand(cmd, depth=1)) |
|
2234 | 2234 | |
|
2235 | 2235 | def system_raw(self, cmd): |
|
2236 | 2236 | """Call the given cmd in a subprocess using os.system |
|
2237 | 2237 | |
|
2238 | 2238 | Parameters |
|
2239 | 2239 | ---------- |
|
2240 | 2240 | cmd : str |
|
2241 | 2241 | Command to execute. |
|
2242 | 2242 | """ |
|
2243 | 2243 | cmd = self.var_expand(cmd, depth=1) |
|
2244 | 2244 | # protect os.system from UNC paths on Windows, which it can't handle: |
|
2245 | 2245 | if sys.platform == 'win32': |
|
2246 | 2246 | from IPython.utils._process_win32 import AvoidUNCPath |
|
2247 | 2247 | with AvoidUNCPath() as path: |
|
2248 | 2248 | if path is not None: |
|
2249 | 2249 | cmd = '"pushd %s &&"%s' % (path, cmd) |
|
2250 | 2250 | cmd = py3compat.unicode_to_str(cmd) |
|
2251 | 2251 | ec = os.system(cmd) |
|
2252 | 2252 | else: |
|
2253 | 2253 | cmd = py3compat.unicode_to_str(cmd) |
|
2254 | 2254 | ec = os.system(cmd) |
|
2255 | 2255 | # The high byte is the exit code, the low byte is a signal number |
|
2256 | 2256 | # that we discard for now. See the docs for os.wait() |
|
2257 | 2257 | if ec > 255: |
|
2258 | 2258 | ec >>= 8 |
|
2259 | 2259 | |
|
2260 | 2260 | # We explicitly do NOT return the subprocess status code, because |
|
2261 | 2261 | # a non-None value would trigger :func:`sys.displayhook` calls. |
|
2262 | 2262 | # Instead, we store the exit_code in user_ns. |
|
2263 | 2263 | self.user_ns['_exit_code'] = ec |
|
2264 | 2264 | |
|
2265 | 2265 | # use piped system by default, because it is better behaved |
|
2266 | 2266 | system = system_piped |
|
2267 | 2267 | |
|
2268 | 2268 | def getoutput(self, cmd, split=True, depth=0): |
|
2269 | 2269 | """Get output (possibly including stderr) from a subprocess. |
|
2270 | 2270 | |
|
2271 | 2271 | Parameters |
|
2272 | 2272 | ---------- |
|
2273 | 2273 | cmd : str |
|
2274 | 2274 | Command to execute (can not end in '&', as background processes are |
|
2275 | 2275 | not supported. |
|
2276 | 2276 | split : bool, optional |
|
2277 | 2277 | If True, split the output into an IPython SList. Otherwise, an |
|
2278 | 2278 | IPython LSString is returned. These are objects similar to normal |
|
2279 | 2279 | lists and strings, with a few convenience attributes for easier |
|
2280 | 2280 | manipulation of line-based output. You can use '?' on them for |
|
2281 | 2281 | details. |
|
2282 | 2282 | depth : int, optional |
|
2283 | 2283 | How many frames above the caller are the local variables which should |
|
2284 | 2284 | be expanded in the command string? The default (0) assumes that the |
|
2285 | 2285 | expansion variables are in the stack frame calling this function. |
|
2286 | 2286 | """ |
|
2287 | 2287 | if cmd.rstrip().endswith('&'): |
|
2288 | 2288 | # this is *far* from a rigorous test |
|
2289 | 2289 | raise OSError("Background processes not supported.") |
|
2290 | 2290 | out = getoutput(self.var_expand(cmd, depth=depth+1)) |
|
2291 | 2291 | if split: |
|
2292 | 2292 | out = SList(out.splitlines()) |
|
2293 | 2293 | else: |
|
2294 | 2294 | out = LSString(out) |
|
2295 | 2295 | return out |
|
2296 | 2296 | |
|
2297 | 2297 | #------------------------------------------------------------------------- |
|
2298 | 2298 | # Things related to aliases |
|
2299 | 2299 | #------------------------------------------------------------------------- |
|
2300 | 2300 | |
|
2301 | 2301 | def init_alias(self): |
|
2302 | 2302 | self.alias_manager = AliasManager(shell=self, config=self.config) |
|
2303 | 2303 | self.configurables.append(self.alias_manager) |
|
2304 | 2304 | self.ns_table['alias'] = self.alias_manager.alias_table, |
|
2305 | 2305 | |
|
2306 | 2306 | #------------------------------------------------------------------------- |
|
2307 | 2307 | # Things related to extensions |
|
2308 | 2308 | #------------------------------------------------------------------------- |
|
2309 | 2309 | |
|
2310 | 2310 | def init_extension_manager(self): |
|
2311 | 2311 | self.extension_manager = ExtensionManager(shell=self, config=self.config) |
|
2312 | 2312 | self.configurables.append(self.extension_manager) |
|
2313 | 2313 | |
|
2314 | 2314 | #------------------------------------------------------------------------- |
|
2315 | 2315 | # Things related to payloads |
|
2316 | 2316 | #------------------------------------------------------------------------- |
|
2317 | 2317 | |
|
2318 | 2318 | def init_payload(self): |
|
2319 | 2319 | self.payload_manager = PayloadManager(config=self.config) |
|
2320 | 2320 | self.configurables.append(self.payload_manager) |
|
2321 | 2321 | |
|
2322 | 2322 | #------------------------------------------------------------------------- |
|
2323 | 2323 | # Things related to the prefilter |
|
2324 | 2324 | #------------------------------------------------------------------------- |
|
2325 | 2325 | |
|
2326 | 2326 | def init_prefilter(self): |
|
2327 | 2327 | self.prefilter_manager = PrefilterManager(shell=self, config=self.config) |
|
2328 | 2328 | self.configurables.append(self.prefilter_manager) |
|
2329 | 2329 | # Ultimately this will be refactored in the new interpreter code, but |
|
2330 | 2330 | # for now, we should expose the main prefilter method (there's legacy |
|
2331 | 2331 | # code out there that may rely on this). |
|
2332 | 2332 | self.prefilter = self.prefilter_manager.prefilter_lines |
|
2333 | 2333 | |
|
2334 | 2334 | def auto_rewrite_input(self, cmd): |
|
2335 | 2335 | """Print to the screen the rewritten form of the user's command. |
|
2336 | 2336 | |
|
2337 | 2337 | This shows visual feedback by rewriting input lines that cause |
|
2338 | 2338 | automatic calling to kick in, like:: |
|
2339 | 2339 | |
|
2340 | 2340 | /f x |
|
2341 | 2341 | |
|
2342 | 2342 | into:: |
|
2343 | 2343 | |
|
2344 | 2344 | ------> f(x) |
|
2345 | 2345 | |
|
2346 | 2346 | after the user's input prompt. This helps the user understand that the |
|
2347 | 2347 | input line was transformed automatically by IPython. |
|
2348 | 2348 | """ |
|
2349 | 2349 | if not self.show_rewritten_input: |
|
2350 | 2350 | return |
|
2351 | 2351 | |
|
2352 | 2352 | rw = self.prompt_manager.render('rewrite') + cmd |
|
2353 | 2353 | |
|
2354 | 2354 | try: |
|
2355 | 2355 | # plain ascii works better w/ pyreadline, on some machines, so |
|
2356 | 2356 | # we use it and only print uncolored rewrite if we have unicode |
|
2357 | 2357 | rw = str(rw) |
|
2358 | 2358 | print(rw, file=io.stdout) |
|
2359 | 2359 | except UnicodeEncodeError: |
|
2360 | 2360 | print("------> " + cmd) |
|
2361 | 2361 | |
|
2362 | 2362 | #------------------------------------------------------------------------- |
|
2363 | 2363 | # Things related to extracting values/expressions from kernel and user_ns |
|
2364 | 2364 | #------------------------------------------------------------------------- |
|
2365 | 2365 | |
|
2366 |
def _s |
|
|
2367 | etype, value = sys.exc_info()[:2] | |
|
2368 | return u'[ERROR] {e.__name__}: {v}'.format(e=etype, v=value) | |
|
2366 | def _user_obj_error(self): | |
|
2367 | """return simple exception dict | |
|
2368 | ||
|
2369 | for use in user_variables / expressions | |
|
2370 | """ | |
|
2371 | ||
|
2372 | etype, evalue, tb = self._get_exc_info() | |
|
2373 | stb = self.InteractiveTB.get_exception_only(etype, evalue) | |
|
2374 | ||
|
2375 | exc_info = { | |
|
2376 | u'status' : 'error', | |
|
2377 | u'traceback' : stb, | |
|
2378 | u'ename' : unicode(etype.__name__), | |
|
2379 | u'evalue' : py3compat.safe_unicode(evalue), | |
|
2380 | } | |
|
2381 | ||
|
2382 | return exc_info | |
|
2383 | ||
|
2384 | def _format_user_obj(self, obj): | |
|
2385 | """format a user object to display dict | |
|
2386 | ||
|
2387 | for use in user_expressions / variables | |
|
2388 | """ | |
|
2389 | ||
|
2390 | data, md = self.display_formatter.format(obj) | |
|
2391 | value = { | |
|
2392 | 'status' : 'ok', | |
|
2393 | 'data' : data, | |
|
2394 | 'metadata' : md, | |
|
2395 | } | |
|
2396 | return value | |
|
2369 | 2397 | |
|
2370 | 2398 | def user_variables(self, names): |
|
2371 | 2399 | """Get a list of variable names from the user's namespace. |
|
2372 | 2400 | |
|
2373 | 2401 | Parameters |
|
2374 | 2402 | ---------- |
|
2375 | 2403 | names : list of strings |
|
2376 | 2404 | A list of names of variables to be read from the user namespace. |
|
2377 | 2405 | |
|
2378 | 2406 | Returns |
|
2379 | 2407 | ------- |
|
2380 | A dict, keyed by the input names and with the repr() of each value. | |
|
2408 | A dict, keyed by the input names and with the rich mime-type repr(s) of each value. | |
|
2409 | Each element will be a sub-dict of the same form as a display_data message. | |
|
2381 | 2410 | """ |
|
2382 | 2411 | out = {} |
|
2383 | 2412 | user_ns = self.user_ns |
|
2413 | ||
|
2384 | 2414 | for varname in names: |
|
2385 | 2415 | try: |
|
2386 |
value = re |
|
|
2416 | value = self._format_user_obj(user_ns[varname]) | |
|
2387 | 2417 | except: |
|
2388 |
value = self._s |
|
|
2418 | value = self._user_obj_error() | |
|
2389 | 2419 | out[varname] = value |
|
2390 | 2420 | return out |
|
2391 | 2421 | |
|
2392 | 2422 | def user_expressions(self, expressions): |
|
2393 | 2423 | """Evaluate a dict of expressions in the user's namespace. |
|
2394 | 2424 | |
|
2395 | 2425 | Parameters |
|
2396 | 2426 | ---------- |
|
2397 | 2427 | expressions : dict |
|
2398 | 2428 | A dict with string keys and string values. The expression values |
|
2399 | 2429 | should be valid Python expressions, each of which will be evaluated |
|
2400 | 2430 | in the user namespace. |
|
2401 | 2431 | |
|
2402 | 2432 | Returns |
|
2403 | 2433 | ------- |
|
2404 |
A dict, keyed like the input expressions dict, with the r |
|
|
2405 | value. | |
|
2434 | A dict, keyed like the input expressions dict, with the rich mime-typed | |
|
2435 | display_data of each value. | |
|
2406 | 2436 | """ |
|
2407 | 2437 | out = {} |
|
2408 | 2438 | user_ns = self.user_ns |
|
2409 | 2439 | global_ns = self.user_global_ns |
|
2440 | ||
|
2410 | 2441 | for key, expr in expressions.iteritems(): |
|
2411 | 2442 | try: |
|
2412 |
value = re |
|
|
2443 | value = self._format_user_obj(eval(expr, global_ns, user_ns)) | |
|
2413 | 2444 | except: |
|
2414 |
value = self._s |
|
|
2445 | value = self._user_obj_error() | |
|
2415 | 2446 | out[key] = value |
|
2416 | 2447 | return out |
|
2417 | 2448 | |
|
2418 | 2449 | #------------------------------------------------------------------------- |
|
2419 | 2450 | # Things related to the running of code |
|
2420 | 2451 | #------------------------------------------------------------------------- |
|
2421 | 2452 | |
|
2422 | 2453 | def ex(self, cmd): |
|
2423 | 2454 | """Execute a normal python statement in user namespace.""" |
|
2424 | 2455 | with self.builtin_trap: |
|
2425 | 2456 | exec cmd in self.user_global_ns, self.user_ns |
|
2426 | 2457 | |
|
2427 | 2458 | def ev(self, expr): |
|
2428 | 2459 | """Evaluate python expression expr in user namespace. |
|
2429 | 2460 | |
|
2430 | 2461 | Returns the result of evaluation |
|
2431 | 2462 | """ |
|
2432 | 2463 | with self.builtin_trap: |
|
2433 | 2464 | return eval(expr, self.user_global_ns, self.user_ns) |
|
2434 | 2465 | |
|
2435 | 2466 | def safe_execfile(self, fname, *where, **kw): |
|
2436 | 2467 | """A safe version of the builtin execfile(). |
|
2437 | 2468 | |
|
2438 | 2469 | This version will never throw an exception, but instead print |
|
2439 | 2470 | helpful error messages to the screen. This only works on pure |
|
2440 | 2471 | Python files with the .py extension. |
|
2441 | 2472 | |
|
2442 | 2473 | Parameters |
|
2443 | 2474 | ---------- |
|
2444 | 2475 | fname : string |
|
2445 | 2476 | The name of the file to be executed. |
|
2446 | 2477 | where : tuple |
|
2447 | 2478 | One or two namespaces, passed to execfile() as (globals,locals). |
|
2448 | 2479 | If only one is given, it is passed as both. |
|
2449 | 2480 | exit_ignore : bool (False) |
|
2450 | 2481 | If True, then silence SystemExit for non-zero status (it is always |
|
2451 | 2482 | silenced for zero status, as it is so common). |
|
2452 | 2483 | raise_exceptions : bool (False) |
|
2453 | 2484 | If True raise exceptions everywhere. Meant for testing. |
|
2454 | 2485 | |
|
2455 | 2486 | """ |
|
2456 | 2487 | kw.setdefault('exit_ignore', False) |
|
2457 | 2488 | kw.setdefault('raise_exceptions', False) |
|
2458 | 2489 | |
|
2459 | 2490 | fname = os.path.abspath(os.path.expanduser(fname)) |
|
2460 | 2491 | |
|
2461 | 2492 | # Make sure we can open the file |
|
2462 | 2493 | try: |
|
2463 | 2494 | with open(fname) as thefile: |
|
2464 | 2495 | pass |
|
2465 | 2496 | except: |
|
2466 | 2497 | warn('Could not open file <%s> for safe execution.' % fname) |
|
2467 | 2498 | return |
|
2468 | 2499 | |
|
2469 | 2500 | # Find things also in current directory. This is needed to mimic the |
|
2470 | 2501 | # behavior of running a script from the system command line, where |
|
2471 | 2502 | # Python inserts the script's directory into sys.path |
|
2472 | 2503 | dname = os.path.dirname(fname) |
|
2473 | 2504 | |
|
2474 | 2505 | with prepended_to_syspath(dname): |
|
2475 | 2506 | try: |
|
2476 | 2507 | py3compat.execfile(fname,*where) |
|
2477 | 2508 | except SystemExit as status: |
|
2478 | 2509 | # If the call was made with 0 or None exit status (sys.exit(0) |
|
2479 | 2510 | # or sys.exit() ), don't bother showing a traceback, as both of |
|
2480 | 2511 | # these are considered normal by the OS: |
|
2481 | 2512 | # > python -c'import sys;sys.exit(0)'; echo $? |
|
2482 | 2513 | # 0 |
|
2483 | 2514 | # > python -c'import sys;sys.exit()'; echo $? |
|
2484 | 2515 | # 0 |
|
2485 | 2516 | # For other exit status, we show the exception unless |
|
2486 | 2517 | # explicitly silenced, but only in short form. |
|
2487 | 2518 | if kw['raise_exceptions']: |
|
2488 | 2519 | raise |
|
2489 | 2520 | if status.code and not kw['exit_ignore']: |
|
2490 | 2521 | self.showtraceback(exception_only=True) |
|
2491 | 2522 | except: |
|
2492 | 2523 | if kw['raise_exceptions']: |
|
2493 | 2524 | raise |
|
2494 | 2525 | self.showtraceback() |
|
2495 | 2526 | |
|
2496 | 2527 | def safe_execfile_ipy(self, fname): |
|
2497 | 2528 | """Like safe_execfile, but for .ipy files with IPython syntax. |
|
2498 | 2529 | |
|
2499 | 2530 | Parameters |
|
2500 | 2531 | ---------- |
|
2501 | 2532 | fname : str |
|
2502 | 2533 | The name of the file to execute. The filename must have a |
|
2503 | 2534 | .ipy extension. |
|
2504 | 2535 | """ |
|
2505 | 2536 | fname = os.path.abspath(os.path.expanduser(fname)) |
|
2506 | 2537 | |
|
2507 | 2538 | # Make sure we can open the file |
|
2508 | 2539 | try: |
|
2509 | 2540 | with open(fname) as thefile: |
|
2510 | 2541 | pass |
|
2511 | 2542 | except: |
|
2512 | 2543 | warn('Could not open file <%s> for safe execution.' % fname) |
|
2513 | 2544 | return |
|
2514 | 2545 | |
|
2515 | 2546 | # Find things also in current directory. This is needed to mimic the |
|
2516 | 2547 | # behavior of running a script from the system command line, where |
|
2517 | 2548 | # Python inserts the script's directory into sys.path |
|
2518 | 2549 | dname = os.path.dirname(fname) |
|
2519 | 2550 | |
|
2520 | 2551 | with prepended_to_syspath(dname): |
|
2521 | 2552 | try: |
|
2522 | 2553 | with open(fname) as thefile: |
|
2523 | 2554 | # self.run_cell currently captures all exceptions |
|
2524 | 2555 | # raised in user code. It would be nice if there were |
|
2525 | 2556 | # versions of runlines, execfile that did raise, so |
|
2526 | 2557 | # we could catch the errors. |
|
2527 | 2558 | self.run_cell(thefile.read(), store_history=False, shell_futures=False) |
|
2528 | 2559 | except: |
|
2529 | 2560 | self.showtraceback() |
|
2530 | 2561 | warn('Unknown failure executing file: <%s>' % fname) |
|
2531 | 2562 | |
|
2532 | 2563 | def safe_run_module(self, mod_name, where): |
|
2533 | 2564 | """A safe version of runpy.run_module(). |
|
2534 | 2565 | |
|
2535 | 2566 | This version will never throw an exception, but instead print |
|
2536 | 2567 | helpful error messages to the screen. |
|
2537 | 2568 | |
|
2538 | 2569 | `SystemExit` exceptions with status code 0 or None are ignored. |
|
2539 | 2570 | |
|
2540 | 2571 | Parameters |
|
2541 | 2572 | ---------- |
|
2542 | 2573 | mod_name : string |
|
2543 | 2574 | The name of the module to be executed. |
|
2544 | 2575 | where : dict |
|
2545 | 2576 | The globals namespace. |
|
2546 | 2577 | """ |
|
2547 | 2578 | try: |
|
2548 | 2579 | try: |
|
2549 | 2580 | where.update( |
|
2550 | 2581 | runpy.run_module(str(mod_name), run_name="__main__", |
|
2551 | 2582 | alter_sys=True) |
|
2552 | 2583 | ) |
|
2553 | 2584 | except SystemExit as status: |
|
2554 | 2585 | if status.code: |
|
2555 | 2586 | raise |
|
2556 | 2587 | except: |
|
2557 | 2588 | self.showtraceback() |
|
2558 | 2589 | warn('Unknown failure executing module: <%s>' % mod_name) |
|
2559 | 2590 | |
|
2560 | 2591 | def _run_cached_cell_magic(self, magic_name, line): |
|
2561 | 2592 | """Special method to call a cell magic with the data stored in self. |
|
2562 | 2593 | """ |
|
2563 | 2594 | cell = self._current_cell_magic_body |
|
2564 | 2595 | self._current_cell_magic_body = None |
|
2565 | 2596 | return self.run_cell_magic(magic_name, line, cell) |
|
2566 | 2597 | |
|
2567 | 2598 | def run_cell(self, raw_cell, store_history=False, silent=False, shell_futures=True): |
|
2568 | 2599 | """Run a complete IPython cell. |
|
2569 | 2600 | |
|
2570 | 2601 | Parameters |
|
2571 | 2602 | ---------- |
|
2572 | 2603 | raw_cell : str |
|
2573 | 2604 | The code (including IPython code such as %magic functions) to run. |
|
2574 | 2605 | store_history : bool |
|
2575 | 2606 | If True, the raw and translated cell will be stored in IPython's |
|
2576 | 2607 | history. For user code calling back into IPython's machinery, this |
|
2577 | 2608 | should be set to False. |
|
2578 | 2609 | silent : bool |
|
2579 | 2610 | If True, avoid side-effects, such as implicit displayhooks and |
|
2580 | 2611 | and logging. silent=True forces store_history=False. |
|
2581 | 2612 | shell_futures : bool |
|
2582 | 2613 | If True, the code will share future statements with the interactive |
|
2583 | 2614 | shell. It will both be affected by previous __future__ imports, and |
|
2584 | 2615 | any __future__ imports in the code will affect the shell. If False, |
|
2585 | 2616 | __future__ imports are not shared in either direction. |
|
2586 | 2617 | """ |
|
2587 | 2618 | if (not raw_cell) or raw_cell.isspace(): |
|
2588 | 2619 | return |
|
2589 | 2620 | |
|
2590 | 2621 | if silent: |
|
2591 | 2622 | store_history = False |
|
2592 | 2623 | |
|
2593 | 2624 | self.input_transformer_manager.push(raw_cell) |
|
2594 | 2625 | cell = self.input_transformer_manager.source_reset() |
|
2595 | 2626 | |
|
2596 | 2627 | # Our own compiler remembers the __future__ environment. If we want to |
|
2597 | 2628 | # run code with a separate __future__ environment, use the default |
|
2598 | 2629 | # compiler |
|
2599 | 2630 | compiler = self.compile if shell_futures else CachingCompiler() |
|
2600 | 2631 | |
|
2601 | 2632 | with self.builtin_trap: |
|
2602 | 2633 | prefilter_failed = False |
|
2603 | 2634 | if len(cell.splitlines()) == 1: |
|
2604 | 2635 | try: |
|
2605 | 2636 | # use prefilter_lines to handle trailing newlines |
|
2606 | 2637 | # restore trailing newline for ast.parse |
|
2607 | 2638 | cell = self.prefilter_manager.prefilter_lines(cell) + '\n' |
|
2608 | 2639 | except AliasError as e: |
|
2609 | 2640 | error(e) |
|
2610 | 2641 | prefilter_failed = True |
|
2611 | 2642 | except Exception: |
|
2612 | 2643 | # don't allow prefilter errors to crash IPython |
|
2613 | 2644 | self.showtraceback() |
|
2614 | 2645 | prefilter_failed = True |
|
2615 | 2646 | |
|
2616 | 2647 | # Store raw and processed history |
|
2617 | 2648 | if store_history: |
|
2618 | 2649 | self.history_manager.store_inputs(self.execution_count, |
|
2619 | 2650 | cell, raw_cell) |
|
2620 | 2651 | if not silent: |
|
2621 | 2652 | self.logger.log(cell, raw_cell) |
|
2622 | 2653 | |
|
2623 | 2654 | if not prefilter_failed: |
|
2624 | 2655 | # don't run if prefilter failed |
|
2625 | 2656 | cell_name = self.compile.cache(cell, self.execution_count) |
|
2626 | 2657 | |
|
2627 | 2658 | with self.display_trap: |
|
2628 | 2659 | try: |
|
2629 | 2660 | code_ast = compiler.ast_parse(cell, filename=cell_name) |
|
2630 | 2661 | except IndentationError: |
|
2631 | 2662 | self.showindentationerror() |
|
2632 | 2663 | if store_history: |
|
2633 | 2664 | self.execution_count += 1 |
|
2634 | 2665 | return None |
|
2635 | 2666 | except (OverflowError, SyntaxError, ValueError, TypeError, |
|
2636 | 2667 | MemoryError): |
|
2637 | 2668 | self.showsyntaxerror() |
|
2638 | 2669 | if store_history: |
|
2639 | 2670 | self.execution_count += 1 |
|
2640 | 2671 | return None |
|
2641 | 2672 | |
|
2642 | 2673 | code_ast = self.transform_ast(code_ast) |
|
2643 | 2674 | |
|
2644 | 2675 | interactivity = "none" if silent else self.ast_node_interactivity |
|
2645 | 2676 | self.run_ast_nodes(code_ast.body, cell_name, |
|
2646 | 2677 | interactivity=interactivity, compiler=compiler) |
|
2647 | 2678 | |
|
2648 | 2679 | # Execute any registered post-execution functions. |
|
2649 | 2680 | # unless we are silent |
|
2650 | 2681 | post_exec = [] if silent else self._post_execute.iteritems() |
|
2651 | 2682 | |
|
2652 | 2683 | for func, status in post_exec: |
|
2653 | 2684 | if self.disable_failing_post_execute and not status: |
|
2654 | 2685 | continue |
|
2655 | 2686 | try: |
|
2656 | 2687 | func() |
|
2657 | 2688 | except KeyboardInterrupt: |
|
2658 | 2689 | print("\nKeyboardInterrupt", file=io.stderr) |
|
2659 | 2690 | except Exception: |
|
2660 | 2691 | # register as failing: |
|
2661 | 2692 | self._post_execute[func] = False |
|
2662 | 2693 | self.showtraceback() |
|
2663 | 2694 | print('\n'.join([ |
|
2664 | 2695 | "post-execution function %r produced an error." % func, |
|
2665 | 2696 | "If this problem persists, you can disable failing post-exec functions with:", |
|
2666 | 2697 | "", |
|
2667 | 2698 | " get_ipython().disable_failing_post_execute = True" |
|
2668 | 2699 | ]), file=io.stderr) |
|
2669 | 2700 | |
|
2670 | 2701 | if store_history: |
|
2671 | 2702 | # Write output to the database. Does nothing unless |
|
2672 | 2703 | # history output logging is enabled. |
|
2673 | 2704 | self.history_manager.store_output(self.execution_count) |
|
2674 | 2705 | # Each cell is a *single* input, regardless of how many lines it has |
|
2675 | 2706 | self.execution_count += 1 |
|
2676 | 2707 | |
|
2677 | 2708 | def transform_ast(self, node): |
|
2678 | 2709 | """Apply the AST transformations from self.ast_transformers |
|
2679 | 2710 | |
|
2680 | 2711 | Parameters |
|
2681 | 2712 | ---------- |
|
2682 | 2713 | node : ast.Node |
|
2683 | 2714 | The root node to be transformed. Typically called with the ast.Module |
|
2684 | 2715 | produced by parsing user input. |
|
2685 | 2716 | |
|
2686 | 2717 | Returns |
|
2687 | 2718 | ------- |
|
2688 | 2719 | An ast.Node corresponding to the node it was called with. Note that it |
|
2689 | 2720 | may also modify the passed object, so don't rely on references to the |
|
2690 | 2721 | original AST. |
|
2691 | 2722 | """ |
|
2692 | 2723 | for transformer in self.ast_transformers: |
|
2693 | 2724 | try: |
|
2694 | 2725 | node = transformer.visit(node) |
|
2695 | 2726 | except Exception: |
|
2696 | 2727 | warn("AST transformer %r threw an error. It will be unregistered." % transformer) |
|
2697 | 2728 | self.ast_transformers.remove(transformer) |
|
2698 | 2729 | |
|
2699 | 2730 | if self.ast_transformers: |
|
2700 | 2731 | ast.fix_missing_locations(node) |
|
2701 | 2732 | return node |
|
2702 | 2733 | |
|
2703 | 2734 | |
|
2704 | 2735 | def run_ast_nodes(self, nodelist, cell_name, interactivity='last_expr', |
|
2705 | 2736 | compiler=compile): |
|
2706 | 2737 | """Run a sequence of AST nodes. The execution mode depends on the |
|
2707 | 2738 | interactivity parameter. |
|
2708 | 2739 | |
|
2709 | 2740 | Parameters |
|
2710 | 2741 | ---------- |
|
2711 | 2742 | nodelist : list |
|
2712 | 2743 | A sequence of AST nodes to run. |
|
2713 | 2744 | cell_name : str |
|
2714 | 2745 | Will be passed to the compiler as the filename of the cell. Typically |
|
2715 | 2746 | the value returned by ip.compile.cache(cell). |
|
2716 | 2747 | interactivity : str |
|
2717 | 2748 | 'all', 'last', 'last_expr' or 'none', specifying which nodes should be |
|
2718 | 2749 | run interactively (displaying output from expressions). 'last_expr' |
|
2719 | 2750 | will run the last node interactively only if it is an expression (i.e. |
|
2720 | 2751 | expressions in loops or other blocks are not displayed. Other values |
|
2721 | 2752 | for this parameter will raise a ValueError. |
|
2722 | 2753 | compiler : callable |
|
2723 | 2754 | A function with the same interface as the built-in compile(), to turn |
|
2724 | 2755 | the AST nodes into code objects. Default is the built-in compile(). |
|
2725 | 2756 | """ |
|
2726 | 2757 | if not nodelist: |
|
2727 | 2758 | return |
|
2728 | 2759 | |
|
2729 | 2760 | if interactivity == 'last_expr': |
|
2730 | 2761 | if isinstance(nodelist[-1], ast.Expr): |
|
2731 | 2762 | interactivity = "last" |
|
2732 | 2763 | else: |
|
2733 | 2764 | interactivity = "none" |
|
2734 | 2765 | |
|
2735 | 2766 | if interactivity == 'none': |
|
2736 | 2767 | to_run_exec, to_run_interactive = nodelist, [] |
|
2737 | 2768 | elif interactivity == 'last': |
|
2738 | 2769 | to_run_exec, to_run_interactive = nodelist[:-1], nodelist[-1:] |
|
2739 | 2770 | elif interactivity == 'all': |
|
2740 | 2771 | to_run_exec, to_run_interactive = [], nodelist |
|
2741 | 2772 | else: |
|
2742 | 2773 | raise ValueError("Interactivity was %r" % interactivity) |
|
2743 | 2774 | |
|
2744 | 2775 | exec_count = self.execution_count |
|
2745 | 2776 | |
|
2746 | 2777 | try: |
|
2747 | 2778 | for i, node in enumerate(to_run_exec): |
|
2748 | 2779 | mod = ast.Module([node]) |
|
2749 | 2780 | code = compiler(mod, cell_name, "exec") |
|
2750 | 2781 | if self.run_code(code): |
|
2751 | 2782 | return True |
|
2752 | 2783 | |
|
2753 | 2784 | for i, node in enumerate(to_run_interactive): |
|
2754 | 2785 | mod = ast.Interactive([node]) |
|
2755 | 2786 | code = compiler(mod, cell_name, "single") |
|
2756 | 2787 | if self.run_code(code): |
|
2757 | 2788 | return True |
|
2758 | 2789 | |
|
2759 | 2790 | # Flush softspace |
|
2760 | 2791 | if softspace(sys.stdout, 0): |
|
2761 | 2792 | print() |
|
2762 | 2793 | |
|
2763 | 2794 | except: |
|
2764 | 2795 | # It's possible to have exceptions raised here, typically by |
|
2765 | 2796 | # compilation of odd code (such as a naked 'return' outside a |
|
2766 | 2797 | # function) that did parse but isn't valid. Typically the exception |
|
2767 | 2798 | # is a SyntaxError, but it's safest just to catch anything and show |
|
2768 | 2799 | # the user a traceback. |
|
2769 | 2800 | |
|
2770 | 2801 | # We do only one try/except outside the loop to minimize the impact |
|
2771 | 2802 | # on runtime, and also because if any node in the node list is |
|
2772 | 2803 | # broken, we should stop execution completely. |
|
2773 | 2804 | self.showtraceback() |
|
2774 | 2805 | |
|
2775 | 2806 | return False |
|
2776 | 2807 | |
|
2777 | 2808 | def run_code(self, code_obj): |
|
2778 | 2809 | """Execute a code object. |
|
2779 | 2810 | |
|
2780 | 2811 | When an exception occurs, self.showtraceback() is called to display a |
|
2781 | 2812 | traceback. |
|
2782 | 2813 | |
|
2783 | 2814 | Parameters |
|
2784 | 2815 | ---------- |
|
2785 | 2816 | code_obj : code object |
|
2786 | 2817 | A compiled code object, to be executed |
|
2787 | 2818 | |
|
2788 | 2819 | Returns |
|
2789 | 2820 | ------- |
|
2790 | 2821 | False : successful execution. |
|
2791 | 2822 | True : an error occurred. |
|
2792 | 2823 | """ |
|
2793 | 2824 | |
|
2794 | 2825 | # Set our own excepthook in case the user code tries to call it |
|
2795 | 2826 | # directly, so that the IPython crash handler doesn't get triggered |
|
2796 | 2827 | old_excepthook,sys.excepthook = sys.excepthook, self.excepthook |
|
2797 | 2828 | |
|
2798 | 2829 | # we save the original sys.excepthook in the instance, in case config |
|
2799 | 2830 | # code (such as magics) needs access to it. |
|
2800 | 2831 | self.sys_excepthook = old_excepthook |
|
2801 | 2832 | outflag = 1 # happens in more places, so it's easier as default |
|
2802 | 2833 | try: |
|
2803 | 2834 | try: |
|
2804 | 2835 | self.hooks.pre_run_code_hook() |
|
2805 | 2836 | #rprint('Running code', repr(code_obj)) # dbg |
|
2806 | 2837 | exec code_obj in self.user_global_ns, self.user_ns |
|
2807 | 2838 | finally: |
|
2808 | 2839 | # Reset our crash handler in place |
|
2809 | 2840 | sys.excepthook = old_excepthook |
|
2810 | 2841 | except SystemExit: |
|
2811 | 2842 | self.showtraceback(exception_only=True) |
|
2812 | 2843 | warn("To exit: use 'exit', 'quit', or Ctrl-D.", level=1) |
|
2813 | 2844 | except self.custom_exceptions: |
|
2814 | 2845 | etype,value,tb = sys.exc_info() |
|
2815 | 2846 | self.CustomTB(etype,value,tb) |
|
2816 | 2847 | except: |
|
2817 | 2848 | self.showtraceback() |
|
2818 | 2849 | else: |
|
2819 | 2850 | outflag = 0 |
|
2820 | 2851 | return outflag |
|
2821 | 2852 | |
|
2822 | 2853 | # For backwards compatibility |
|
2823 | 2854 | runcode = run_code |
|
2824 | 2855 | |
|
2825 | 2856 | #------------------------------------------------------------------------- |
|
2826 | 2857 | # Things related to GUI support and pylab |
|
2827 | 2858 | #------------------------------------------------------------------------- |
|
2828 | 2859 | |
|
2829 | 2860 | def enable_gui(self, gui=None): |
|
2830 | 2861 | raise NotImplementedError('Implement enable_gui in a subclass') |
|
2831 | 2862 | |
|
2832 | 2863 | def enable_pylab(self, gui=None, import_all=True, welcome_message=False): |
|
2833 | 2864 | """Activate pylab support at runtime. |
|
2834 | 2865 | |
|
2835 | 2866 | This turns on support for matplotlib, preloads into the interactive |
|
2836 | 2867 | namespace all of numpy and pylab, and configures IPython to correctly |
|
2837 | 2868 | interact with the GUI event loop. The GUI backend to be used can be |
|
2838 | 2869 | optionally selected with the optional ``gui`` argument. |
|
2839 | 2870 | |
|
2840 | 2871 | Parameters |
|
2841 | 2872 | ---------- |
|
2842 | 2873 | gui : optional, string |
|
2843 | 2874 | If given, dictates the choice of matplotlib GUI backend to use |
|
2844 | 2875 | (should be one of IPython's supported backends, 'qt', 'osx', 'tk', |
|
2845 | 2876 | 'gtk', 'wx' or 'inline'), otherwise we use the default chosen by |
|
2846 | 2877 | matplotlib (as dictated by the matplotlib build-time options plus the |
|
2847 | 2878 | user's matplotlibrc configuration file). Note that not all backends |
|
2848 | 2879 | make sense in all contexts, for example a terminal ipython can't |
|
2849 | 2880 | display figures inline. |
|
2850 | 2881 | """ |
|
2851 | 2882 | from IPython.core.pylabtools import mpl_runner |
|
2852 | 2883 | # We want to prevent the loading of pylab to pollute the user's |
|
2853 | 2884 | # namespace as shown by the %who* magics, so we execute the activation |
|
2854 | 2885 | # code in an empty namespace, and we update *both* user_ns and |
|
2855 | 2886 | # user_ns_hidden with this information. |
|
2856 | 2887 | ns = {} |
|
2857 | 2888 | try: |
|
2858 | 2889 | gui = pylab_activate(ns, gui, import_all, self, welcome_message=welcome_message) |
|
2859 | 2890 | except KeyError: |
|
2860 | 2891 | error("Backend %r not supported" % gui) |
|
2861 | 2892 | return |
|
2862 | 2893 | except ImportError: |
|
2863 | 2894 | error("pylab mode doesn't work as matplotlib could not be found." + \ |
|
2864 | 2895 | "\nIs it installed on the system?") |
|
2865 | 2896 | return |
|
2866 | 2897 | self.user_ns.update(ns) |
|
2867 | 2898 | self.user_ns_hidden.update(ns) |
|
2868 | 2899 | # Now we must activate the gui pylab wants to use, and fix %run to take |
|
2869 | 2900 | # plot updates into account |
|
2870 | 2901 | self.enable_gui(gui) |
|
2871 | 2902 | self.magics_manager.registry['ExecutionMagics'].default_runner = \ |
|
2872 | 2903 | mpl_runner(self.safe_execfile) |
|
2873 | 2904 | |
|
2874 | 2905 | #------------------------------------------------------------------------- |
|
2875 | 2906 | # Utilities |
|
2876 | 2907 | #------------------------------------------------------------------------- |
|
2877 | 2908 | |
|
2878 | 2909 | def var_expand(self, cmd, depth=0, formatter=DollarFormatter()): |
|
2879 | 2910 | """Expand python variables in a string. |
|
2880 | 2911 | |
|
2881 | 2912 | The depth argument indicates how many frames above the caller should |
|
2882 | 2913 | be walked to look for the local namespace where to expand variables. |
|
2883 | 2914 | |
|
2884 | 2915 | The global namespace for expansion is always the user's interactive |
|
2885 | 2916 | namespace. |
|
2886 | 2917 | """ |
|
2887 | 2918 | ns = self.user_ns.copy() |
|
2888 | 2919 | ns.update(sys._getframe(depth+1).f_locals) |
|
2889 | 2920 | try: |
|
2890 | 2921 | # We have to use .vformat() here, because 'self' is a valid and common |
|
2891 | 2922 | # name, and expanding **ns for .format() would make it collide with |
|
2892 | 2923 | # the 'self' argument of the method. |
|
2893 | 2924 | cmd = formatter.vformat(cmd, args=[], kwargs=ns) |
|
2894 | 2925 | except Exception: |
|
2895 | 2926 | # if formatter couldn't format, just let it go untransformed |
|
2896 | 2927 | pass |
|
2897 | 2928 | return cmd |
|
2898 | 2929 | |
|
2899 | 2930 | def mktempfile(self, data=None, prefix='ipython_edit_'): |
|
2900 | 2931 | """Make a new tempfile and return its filename. |
|
2901 | 2932 | |
|
2902 | 2933 | This makes a call to tempfile.mktemp, but it registers the created |
|
2903 | 2934 | filename internally so ipython cleans it up at exit time. |
|
2904 | 2935 | |
|
2905 | 2936 | Optional inputs: |
|
2906 | 2937 | |
|
2907 | 2938 | - data(None): if data is given, it gets written out to the temp file |
|
2908 | 2939 | immediately, and the file is closed again.""" |
|
2909 | 2940 | |
|
2910 | 2941 | filename = tempfile.mktemp('.py', prefix) |
|
2911 | 2942 | self.tempfiles.append(filename) |
|
2912 | 2943 | |
|
2913 | 2944 | if data: |
|
2914 | 2945 | tmp_file = open(filename,'w') |
|
2915 | 2946 | tmp_file.write(data) |
|
2916 | 2947 | tmp_file.close() |
|
2917 | 2948 | return filename |
|
2918 | 2949 | |
|
2919 | 2950 | # TODO: This should be removed when Term is refactored. |
|
2920 | 2951 | def write(self,data): |
|
2921 | 2952 | """Write a string to the default output""" |
|
2922 | 2953 | io.stdout.write(data) |
|
2923 | 2954 | |
|
2924 | 2955 | # TODO: This should be removed when Term is refactored. |
|
2925 | 2956 | def write_err(self,data): |
|
2926 | 2957 | """Write a string to the default error output""" |
|
2927 | 2958 | io.stderr.write(data) |
|
2928 | 2959 | |
|
2929 | 2960 | def ask_yes_no(self, prompt, default=None): |
|
2930 | 2961 | if self.quiet: |
|
2931 | 2962 | return True |
|
2932 | 2963 | return ask_yes_no(prompt,default) |
|
2933 | 2964 | |
|
2934 | 2965 | def show_usage(self): |
|
2935 | 2966 | """Show a usage message""" |
|
2936 | 2967 | page.page(IPython.core.usage.interactive_usage) |
|
2937 | 2968 | |
|
2938 | 2969 | def extract_input_lines(self, range_str, raw=False): |
|
2939 | 2970 | """Return as a string a set of input history slices. |
|
2940 | 2971 | |
|
2941 | 2972 | Parameters |
|
2942 | 2973 | ---------- |
|
2943 | 2974 | range_str : string |
|
2944 | 2975 | The set of slices is given as a string, like "~5/6-~4/2 4:8 9", |
|
2945 | 2976 | since this function is for use by magic functions which get their |
|
2946 | 2977 | arguments as strings. The number before the / is the session |
|
2947 | 2978 | number: ~n goes n back from the current session. |
|
2948 | 2979 | |
|
2949 | 2980 | Optional Parameters: |
|
2950 | 2981 | - raw(False): by default, the processed input is used. If this is |
|
2951 | 2982 | true, the raw input history is used instead. |
|
2952 | 2983 | |
|
2953 | 2984 | Note that slices can be called with two notations: |
|
2954 | 2985 | |
|
2955 | 2986 | N:M -> standard python form, means including items N...(M-1). |
|
2956 | 2987 | |
|
2957 | 2988 | N-M -> include items N..M (closed endpoint).""" |
|
2958 | 2989 | lines = self.history_manager.get_range_by_str(range_str, raw=raw) |
|
2959 | 2990 | return "\n".join(x for _, _, x in lines) |
|
2960 | 2991 | |
|
2961 | 2992 | def find_user_code(self, target, raw=True, py_only=False, skip_encoding_cookie=True): |
|
2962 | 2993 | """Get a code string from history, file, url, or a string or macro. |
|
2963 | 2994 | |
|
2964 | 2995 | This is mainly used by magic functions. |
|
2965 | 2996 | |
|
2966 | 2997 | Parameters |
|
2967 | 2998 | ---------- |
|
2968 | 2999 | |
|
2969 | 3000 | target : str |
|
2970 | 3001 | |
|
2971 | 3002 | A string specifying code to retrieve. This will be tried respectively |
|
2972 | 3003 | as: ranges of input history (see %history for syntax), url, |
|
2973 | 3004 | correspnding .py file, filename, or an expression evaluating to a |
|
2974 | 3005 | string or Macro in the user namespace. |
|
2975 | 3006 | |
|
2976 | 3007 | raw : bool |
|
2977 | 3008 | If true (default), retrieve raw history. Has no effect on the other |
|
2978 | 3009 | retrieval mechanisms. |
|
2979 | 3010 | |
|
2980 | 3011 | py_only : bool (default False) |
|
2981 | 3012 | Only try to fetch python code, do not try alternative methods to decode file |
|
2982 | 3013 | if unicode fails. |
|
2983 | 3014 | |
|
2984 | 3015 | Returns |
|
2985 | 3016 | ------- |
|
2986 | 3017 | A string of code. |
|
2987 | 3018 | |
|
2988 | 3019 | ValueError is raised if nothing is found, and TypeError if it evaluates |
|
2989 | 3020 | to an object of another type. In each case, .args[0] is a printable |
|
2990 | 3021 | message. |
|
2991 | 3022 | """ |
|
2992 | 3023 | code = self.extract_input_lines(target, raw=raw) # Grab history |
|
2993 | 3024 | if code: |
|
2994 | 3025 | return code |
|
2995 | 3026 | utarget = unquote_filename(target) |
|
2996 | 3027 | try: |
|
2997 | 3028 | if utarget.startswith(('http://', 'https://')): |
|
2998 | 3029 | return openpy.read_py_url(utarget, skip_encoding_cookie=skip_encoding_cookie) |
|
2999 | 3030 | except UnicodeDecodeError: |
|
3000 | 3031 | if not py_only : |
|
3001 | 3032 | from urllib import urlopen # Deferred import |
|
3002 | 3033 | response = urlopen(target) |
|
3003 | 3034 | return response.read().decode('latin1') |
|
3004 | 3035 | raise ValueError(("'%s' seem to be unreadable.") % utarget) |
|
3005 | 3036 | |
|
3006 | 3037 | potential_target = [target] |
|
3007 | 3038 | try : |
|
3008 | 3039 | potential_target.insert(0,get_py_filename(target)) |
|
3009 | 3040 | except IOError: |
|
3010 | 3041 | pass |
|
3011 | 3042 | |
|
3012 | 3043 | for tgt in potential_target : |
|
3013 | 3044 | if os.path.isfile(tgt): # Read file |
|
3014 | 3045 | try : |
|
3015 | 3046 | return openpy.read_py_file(tgt, skip_encoding_cookie=skip_encoding_cookie) |
|
3016 | 3047 | except UnicodeDecodeError : |
|
3017 | 3048 | if not py_only : |
|
3018 | 3049 | with io_open(tgt,'r', encoding='latin1') as f : |
|
3019 | 3050 | return f.read() |
|
3020 | 3051 | raise ValueError(("'%s' seem to be unreadable.") % target) |
|
3021 | 3052 | elif os.path.isdir(os.path.expanduser(tgt)): |
|
3022 | 3053 | raise ValueError("'%s' is a directory, not a regular file." % target) |
|
3023 | 3054 | |
|
3024 | 3055 | try: # User namespace |
|
3025 | 3056 | codeobj = eval(target, self.user_ns) |
|
3026 | 3057 | except Exception: |
|
3027 | 3058 | raise ValueError(("'%s' was not found in history, as a file, url, " |
|
3028 | 3059 | "nor in the user namespace.") % target) |
|
3029 | 3060 | if isinstance(codeobj, basestring): |
|
3030 | 3061 | return codeobj |
|
3031 | 3062 | elif isinstance(codeobj, Macro): |
|
3032 | 3063 | return codeobj.value |
|
3033 | 3064 | |
|
3034 | 3065 | raise TypeError("%s is neither a string nor a macro." % target, |
|
3035 | 3066 | codeobj) |
|
3036 | 3067 | |
|
3037 | 3068 | #------------------------------------------------------------------------- |
|
3038 | 3069 | # Things related to IPython exiting |
|
3039 | 3070 | #------------------------------------------------------------------------- |
|
3040 | 3071 | def atexit_operations(self): |
|
3041 | 3072 | """This will be executed at the time of exit. |
|
3042 | 3073 | |
|
3043 | 3074 | Cleanup operations and saving of persistent data that is done |
|
3044 | 3075 | unconditionally by IPython should be performed here. |
|
3045 | 3076 | |
|
3046 | 3077 | For things that may depend on startup flags or platform specifics (such |
|
3047 | 3078 | as having readline or not), register a separate atexit function in the |
|
3048 | 3079 | code that has the appropriate information, rather than trying to |
|
3049 | 3080 | clutter |
|
3050 | 3081 | """ |
|
3051 | 3082 | # Close the history session (this stores the end time and line count) |
|
3052 | 3083 | # this must be *before* the tempfile cleanup, in case of temporary |
|
3053 | 3084 | # history db |
|
3054 | 3085 | self.history_manager.end_session() |
|
3055 | 3086 | |
|
3056 | 3087 | # Cleanup all tempfiles left around |
|
3057 | 3088 | for tfile in self.tempfiles: |
|
3058 | 3089 | try: |
|
3059 | 3090 | os.unlink(tfile) |
|
3060 | 3091 | except OSError: |
|
3061 | 3092 | pass |
|
3062 | 3093 | |
|
3063 | 3094 | # Clear all user namespaces to release all references cleanly. |
|
3064 | 3095 | self.reset(new_session=False) |
|
3065 | 3096 | |
|
3066 | 3097 | # Run user hooks |
|
3067 | 3098 | self.hooks.shutdown_hook() |
|
3068 | 3099 | |
|
3069 | 3100 | def cleanup(self): |
|
3070 | 3101 | self.restore_sys_module_state() |
|
3071 | 3102 | |
|
3072 | 3103 | |
|
3073 | 3104 | class InteractiveShellABC(object): |
|
3074 | 3105 | """An abstract base class for InteractiveShell.""" |
|
3075 | 3106 | __metaclass__ = abc.ABCMeta |
|
3076 | 3107 | |
|
3077 | 3108 | InteractiveShellABC.register(InteractiveShell) |
@@ -1,686 +1,677 b'' | |||
|
1 | 1 | # encoding: utf-8 |
|
2 | 2 | """Magic functions for InteractiveShell. |
|
3 | 3 | """ |
|
4 | 4 | |
|
5 | 5 | #----------------------------------------------------------------------------- |
|
6 | 6 | # Copyright (C) 2001 Janko Hauser <jhauser@zscout.de> and |
|
7 | 7 | # Copyright (C) 2001 Fernando Perez <fperez@colorado.edu> |
|
8 | 8 | # Copyright (C) 2008 The IPython Development Team |
|
9 | 9 | |
|
10 | 10 | # Distributed under the terms of the BSD License. The full license is in |
|
11 | 11 | # the file COPYING, distributed as part of this software. |
|
12 | 12 | #----------------------------------------------------------------------------- |
|
13 | 13 | |
|
14 | 14 | #----------------------------------------------------------------------------- |
|
15 | 15 | # Imports |
|
16 | 16 | #----------------------------------------------------------------------------- |
|
17 | 17 | # Stdlib |
|
18 | import json | |
|
18 | 19 | import os |
|
19 | 20 | import re |
|
20 | 21 | import sys |
|
21 | 22 | import types |
|
22 | 23 | from getopt import getopt, GetoptError |
|
23 | 24 | |
|
24 | 25 | # Our own |
|
25 | 26 | from IPython.config.configurable import Configurable |
|
26 | 27 | from IPython.core import oinspect |
|
27 | 28 | from IPython.core.error import UsageError |
|
28 | 29 | from IPython.core.inputsplitter import ESC_MAGIC, ESC_MAGIC2 |
|
29 | 30 | from IPython.external.decorator import decorator |
|
30 | 31 | from IPython.utils.ipstruct import Struct |
|
31 | 32 | from IPython.utils.process import arg_split |
|
32 | 33 | from IPython.utils.text import dedent |
|
33 | 34 | from IPython.utils.traitlets import Bool, Dict, Instance, MetaHasTraits |
|
34 | 35 | from IPython.utils.warn import error |
|
35 | 36 | |
|
36 | 37 | #----------------------------------------------------------------------------- |
|
37 | 38 | # Globals |
|
38 | 39 | #----------------------------------------------------------------------------- |
|
39 | 40 | |
|
40 | 41 | # A dict we'll use for each class that has magics, used as temporary storage to |
|
41 | 42 | # pass information between the @line/cell_magic method decorators and the |
|
42 | 43 | # @magics_class class decorator, because the method decorators have no |
|
43 | 44 | # access to the class when they run. See for more details: |
|
44 | 45 | # http://stackoverflow.com/questions/2366713/can-a-python-decorator-of-an-instance-method-access-the-class |
|
45 | 46 | |
|
46 | 47 | magics = dict(line={}, cell={}) |
|
47 | 48 | |
|
48 | 49 | magic_kinds = ('line', 'cell') |
|
49 | 50 | magic_spec = ('line', 'cell', 'line_cell') |
|
50 | 51 | magic_escapes = dict(line=ESC_MAGIC, cell=ESC_MAGIC2) |
|
51 | 52 | |
|
52 | 53 | #----------------------------------------------------------------------------- |
|
53 | 54 | # Utility classes and functions |
|
54 | 55 | #----------------------------------------------------------------------------- |
|
55 | 56 | |
|
56 | 57 | class Bunch: pass |
|
57 | 58 | |
|
58 | 59 | |
|
59 | 60 | def on_off(tag): |
|
60 | 61 | """Return an ON/OFF string for a 1/0 input. Simple utility function.""" |
|
61 | 62 | return ['OFF','ON'][tag] |
|
62 | 63 | |
|
63 | 64 | |
|
64 | 65 | def compress_dhist(dh): |
|
65 | 66 | """Compress a directory history into a new one with at most 20 entries. |
|
66 | 67 | |
|
67 | 68 | Return a new list made from the first and last 10 elements of dhist after |
|
68 | 69 | removal of duplicates. |
|
69 | 70 | """ |
|
70 | 71 | head, tail = dh[:-10], dh[-10:] |
|
71 | 72 | |
|
72 | 73 | newhead = [] |
|
73 | 74 | done = set() |
|
74 | 75 | for h in head: |
|
75 | 76 | if h in done: |
|
76 | 77 | continue |
|
77 | 78 | newhead.append(h) |
|
78 | 79 | done.add(h) |
|
79 | 80 | |
|
80 | 81 | return newhead + tail |
|
81 | 82 | |
|
82 | 83 | |
|
83 | 84 | def needs_local_scope(func): |
|
84 | 85 | """Decorator to mark magic functions which need to local scope to run.""" |
|
85 | 86 | func.needs_local_scope = True |
|
86 | 87 | return func |
|
87 | 88 | |
|
88 | 89 | #----------------------------------------------------------------------------- |
|
89 | 90 | # Class and method decorators for registering magics |
|
90 | 91 | #----------------------------------------------------------------------------- |
|
91 | 92 | |
|
92 | 93 | def magics_class(cls): |
|
93 | 94 | """Class decorator for all subclasses of the main Magics class. |
|
94 | 95 | |
|
95 | 96 | Any class that subclasses Magics *must* also apply this decorator, to |
|
96 | 97 | ensure that all the methods that have been decorated as line/cell magics |
|
97 | 98 | get correctly registered in the class instance. This is necessary because |
|
98 | 99 | when method decorators run, the class does not exist yet, so they |
|
99 | 100 | temporarily store their information into a module global. Application of |
|
100 | 101 | this class decorator copies that global data to the class instance and |
|
101 | 102 | clears the global. |
|
102 | 103 | |
|
103 | 104 | Obviously, this mechanism is not thread-safe, which means that the |
|
104 | 105 | *creation* of subclasses of Magic should only be done in a single-thread |
|
105 | 106 | context. Instantiation of the classes has no restrictions. Given that |
|
106 | 107 | these classes are typically created at IPython startup time and before user |
|
107 | 108 | application code becomes active, in practice this should not pose any |
|
108 | 109 | problems. |
|
109 | 110 | """ |
|
110 | 111 | cls.registered = True |
|
111 | 112 | cls.magics = dict(line = magics['line'], |
|
112 | 113 | cell = magics['cell']) |
|
113 | 114 | magics['line'] = {} |
|
114 | 115 | magics['cell'] = {} |
|
115 | 116 | return cls |
|
116 | 117 | |
|
117 | 118 | |
|
118 | 119 | def record_magic(dct, magic_kind, magic_name, func): |
|
119 | 120 | """Utility function to store a function as a magic of a specific kind. |
|
120 | 121 | |
|
121 | 122 | Parameters |
|
122 | 123 | ---------- |
|
123 | 124 | dct : dict |
|
124 | 125 | A dictionary with 'line' and 'cell' subdicts. |
|
125 | 126 | |
|
126 | 127 | magic_kind : str |
|
127 | 128 | Kind of magic to be stored. |
|
128 | 129 | |
|
129 | 130 | magic_name : str |
|
130 | 131 | Key to store the magic as. |
|
131 | 132 | |
|
132 | 133 | func : function |
|
133 | 134 | Callable object to store. |
|
134 | 135 | """ |
|
135 | 136 | if magic_kind == 'line_cell': |
|
136 | 137 | dct['line'][magic_name] = dct['cell'][magic_name] = func |
|
137 | 138 | else: |
|
138 | 139 | dct[magic_kind][magic_name] = func |
|
139 | 140 | |
|
140 | 141 | |
|
141 | 142 | def validate_type(magic_kind): |
|
142 | 143 | """Ensure that the given magic_kind is valid. |
|
143 | 144 | |
|
144 | 145 | Check that the given magic_kind is one of the accepted spec types (stored |
|
145 | 146 | in the global `magic_spec`), raise ValueError otherwise. |
|
146 | 147 | """ |
|
147 | 148 | if magic_kind not in magic_spec: |
|
148 | 149 | raise ValueError('magic_kind must be one of %s, %s given' % |
|
149 | 150 | magic_kinds, magic_kind) |
|
150 | 151 | |
|
151 | 152 | |
|
152 | 153 | # The docstrings for the decorator below will be fairly similar for the two |
|
153 | 154 | # types (method and function), so we generate them here once and reuse the |
|
154 | 155 | # templates below. |
|
155 | 156 | _docstring_template = \ |
|
156 | 157 | """Decorate the given {0} as {1} magic. |
|
157 | 158 | |
|
158 | 159 | The decorator can be used with or without arguments, as follows. |
|
159 | 160 | |
|
160 | 161 | i) without arguments: it will create a {1} magic named as the {0} being |
|
161 | 162 | decorated:: |
|
162 | 163 | |
|
163 | 164 | @deco |
|
164 | 165 | def foo(...) |
|
165 | 166 | |
|
166 | 167 | will create a {1} magic named `foo`. |
|
167 | 168 | |
|
168 | 169 | ii) with one string argument: which will be used as the actual name of the |
|
169 | 170 | resulting magic:: |
|
170 | 171 | |
|
171 | 172 | @deco('bar') |
|
172 | 173 | def foo(...) |
|
173 | 174 | |
|
174 | 175 | will create a {1} magic named `bar`. |
|
175 | 176 | """ |
|
176 | 177 | |
|
177 | 178 | # These two are decorator factories. While they are conceptually very similar, |
|
178 | 179 | # there are enough differences in the details that it's simpler to have them |
|
179 | 180 | # written as completely standalone functions rather than trying to share code |
|
180 | 181 | # and make a single one with convoluted logic. |
|
181 | 182 | |
|
182 | 183 | def _method_magic_marker(magic_kind): |
|
183 | 184 | """Decorator factory for methods in Magics subclasses. |
|
184 | 185 | """ |
|
185 | 186 | |
|
186 | 187 | validate_type(magic_kind) |
|
187 | 188 | |
|
188 | 189 | # This is a closure to capture the magic_kind. We could also use a class, |
|
189 | 190 | # but it's overkill for just that one bit of state. |
|
190 | 191 | def magic_deco(arg): |
|
191 | 192 | call = lambda f, *a, **k: f(*a, **k) |
|
192 | 193 | |
|
193 | 194 | if callable(arg): |
|
194 | 195 | # "Naked" decorator call (just @foo, no args) |
|
195 | 196 | func = arg |
|
196 | 197 | name = func.func_name |
|
197 | 198 | retval = decorator(call, func) |
|
198 | 199 | record_magic(magics, magic_kind, name, name) |
|
199 | 200 | elif isinstance(arg, basestring): |
|
200 | 201 | # Decorator called with arguments (@foo('bar')) |
|
201 | 202 | name = arg |
|
202 | 203 | def mark(func, *a, **kw): |
|
203 | 204 | record_magic(magics, magic_kind, name, func.func_name) |
|
204 | 205 | return decorator(call, func) |
|
205 | 206 | retval = mark |
|
206 | 207 | else: |
|
207 | 208 | raise TypeError("Decorator can only be called with " |
|
208 | 209 | "string or function") |
|
209 | 210 | return retval |
|
210 | 211 | |
|
211 | 212 | # Ensure the resulting decorator has a usable docstring |
|
212 | 213 | magic_deco.__doc__ = _docstring_template.format('method', magic_kind) |
|
213 | 214 | return magic_deco |
|
214 | 215 | |
|
215 | 216 | |
|
216 | 217 | def _function_magic_marker(magic_kind): |
|
217 | 218 | """Decorator factory for standalone functions. |
|
218 | 219 | """ |
|
219 | 220 | validate_type(magic_kind) |
|
220 | 221 | |
|
221 | 222 | # This is a closure to capture the magic_kind. We could also use a class, |
|
222 | 223 | # but it's overkill for just that one bit of state. |
|
223 | 224 | def magic_deco(arg): |
|
224 | 225 | call = lambda f, *a, **k: f(*a, **k) |
|
225 | 226 | |
|
226 | 227 | # Find get_ipython() in the caller's namespace |
|
227 | 228 | caller = sys._getframe(1) |
|
228 | 229 | for ns in ['f_locals', 'f_globals', 'f_builtins']: |
|
229 | 230 | get_ipython = getattr(caller, ns).get('get_ipython') |
|
230 | 231 | if get_ipython is not None: |
|
231 | 232 | break |
|
232 | 233 | else: |
|
233 | 234 | raise NameError('Decorator can only run in context where ' |
|
234 | 235 | '`get_ipython` exists') |
|
235 | 236 | |
|
236 | 237 | ip = get_ipython() |
|
237 | 238 | |
|
238 | 239 | if callable(arg): |
|
239 | 240 | # "Naked" decorator call (just @foo, no args) |
|
240 | 241 | func = arg |
|
241 | 242 | name = func.func_name |
|
242 | 243 | ip.register_magic_function(func, magic_kind, name) |
|
243 | 244 | retval = decorator(call, func) |
|
244 | 245 | elif isinstance(arg, basestring): |
|
245 | 246 | # Decorator called with arguments (@foo('bar')) |
|
246 | 247 | name = arg |
|
247 | 248 | def mark(func, *a, **kw): |
|
248 | 249 | ip.register_magic_function(func, magic_kind, name) |
|
249 | 250 | return decorator(call, func) |
|
250 | 251 | retval = mark |
|
251 | 252 | else: |
|
252 | 253 | raise TypeError("Decorator can only be called with " |
|
253 | 254 | "string or function") |
|
254 | 255 | return retval |
|
255 | 256 | |
|
256 | 257 | # Ensure the resulting decorator has a usable docstring |
|
257 | 258 | ds = _docstring_template.format('function', magic_kind) |
|
258 | 259 | |
|
259 | 260 | ds += dedent(""" |
|
260 | 261 | Note: this decorator can only be used in a context where IPython is already |
|
261 | 262 | active, so that the `get_ipython()` call succeeds. You can therefore use |
|
262 | 263 | it in your startup files loaded after IPython initializes, but *not* in the |
|
263 | 264 | IPython configuration file itself, which is executed before IPython is |
|
264 | 265 | fully up and running. Any file located in the `startup` subdirectory of |
|
265 | 266 | your configuration profile will be OK in this sense. |
|
266 | 267 | """) |
|
267 | 268 | |
|
268 | 269 | magic_deco.__doc__ = ds |
|
269 | 270 | return magic_deco |
|
270 | 271 | |
|
271 | 272 | |
|
272 | 273 | # Create the actual decorators for public use |
|
273 | 274 | |
|
274 | 275 | # These three are used to decorate methods in class definitions |
|
275 | 276 | line_magic = _method_magic_marker('line') |
|
276 | 277 | cell_magic = _method_magic_marker('cell') |
|
277 | 278 | line_cell_magic = _method_magic_marker('line_cell') |
|
278 | 279 | |
|
279 | 280 | # These three decorate standalone functions and perform the decoration |
|
280 | 281 | # immediately. They can only run where get_ipython() works |
|
281 | 282 | register_line_magic = _function_magic_marker('line') |
|
282 | 283 | register_cell_magic = _function_magic_marker('cell') |
|
283 | 284 | register_line_cell_magic = _function_magic_marker('line_cell') |
|
284 | 285 | |
|
285 | 286 | #----------------------------------------------------------------------------- |
|
286 | 287 | # Core Magic classes |
|
287 | 288 | #----------------------------------------------------------------------------- |
|
288 | 289 | |
|
289 | 290 | class MagicsManager(Configurable): |
|
290 | 291 | """Object that handles all magic-related functionality for IPython. |
|
291 | 292 | """ |
|
292 | 293 | # Non-configurable class attributes |
|
293 | 294 | |
|
294 | 295 | # A two-level dict, first keyed by magic type, then by magic function, and |
|
295 | 296 | # holding the actual callable object as value. This is the dict used for |
|
296 | 297 | # magic function dispatch |
|
297 | 298 | magics = Dict |
|
298 | 299 | |
|
299 | 300 | # A registry of the original objects that we've been given holding magics. |
|
300 | 301 | registry = Dict |
|
301 | 302 | |
|
302 | 303 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') |
|
303 | 304 | |
|
304 | 305 | auto_magic = Bool(True, config=True, help= |
|
305 | 306 | "Automatically call line magics without requiring explicit % prefix") |
|
306 | 307 | |
|
307 | 308 | def _auto_magic_changed(self, name, value): |
|
308 | 309 | self.shell.automagic = value |
|
309 | 310 | |
|
310 | 311 | _auto_status = [ |
|
311 | 312 | 'Automagic is OFF, % prefix IS needed for line magics.', |
|
312 | 313 | 'Automagic is ON, % prefix IS NOT needed for line magics.'] |
|
313 | 314 | |
|
314 | 315 | user_magics = Instance('IPython.core.magics.UserMagics') |
|
315 | 316 | |
|
316 | 317 | def __init__(self, shell=None, config=None, user_magics=None, **traits): |
|
317 | 318 | |
|
318 | 319 | super(MagicsManager, self).__init__(shell=shell, config=config, |
|
319 | 320 | user_magics=user_magics, **traits) |
|
320 | 321 | self.magics = dict(line={}, cell={}) |
|
321 | 322 | # Let's add the user_magics to the registry for uniformity, so *all* |
|
322 | 323 | # registered magic containers can be found there. |
|
323 | 324 | self.registry[user_magics.__class__.__name__] = user_magics |
|
324 | 325 | |
|
325 | 326 | def auto_status(self): |
|
326 | 327 | """Return descriptive string with automagic status.""" |
|
327 | 328 | return self._auto_status[self.auto_magic] |
|
328 | 329 | |
|
329 | def lsmagic_info(self): | |
|
330 | magic_list = [] | |
|
331 | for m_type in self.magics : | |
|
332 | for m_name,mgc in self.magics[m_type].items(): | |
|
333 | try : | |
|
334 | magic_list.append({'name':m_name,'type':m_type,'class':mgc.im_class.__name__}) | |
|
335 | except AttributeError : | |
|
336 | magic_list.append({'name':m_name,'type':m_type,'class':'Other'}) | |
|
337 | return magic_list | |
|
338 | ||
|
339 | 330 | def lsmagic(self): |
|
340 | 331 | """Return a dict of currently available magic functions. |
|
341 | 332 | |
|
342 | 333 | The return dict has the keys 'line' and 'cell', corresponding to the |
|
343 | 334 | two types of magics we support. Each value is a list of names. |
|
344 | 335 | """ |
|
345 | 336 | return self.magics |
|
346 | 337 | |
|
347 | 338 | def lsmagic_docs(self, brief=False, missing=''): |
|
348 | 339 | """Return dict of documentation of magic functions. |
|
349 | 340 | |
|
350 | 341 | The return dict has the keys 'line' and 'cell', corresponding to the |
|
351 | 342 | two types of magics we support. Each value is a dict keyed by magic |
|
352 | 343 | name whose value is the function docstring. If a docstring is |
|
353 | 344 | unavailable, the value of `missing` is used instead. |
|
354 | 345 | |
|
355 | 346 | If brief is True, only the first line of each docstring will be returned. |
|
356 | 347 | """ |
|
357 | 348 | docs = {} |
|
358 | 349 | for m_type in self.magics: |
|
359 | 350 | m_docs = {} |
|
360 | 351 | for m_name, m_func in self.magics[m_type].iteritems(): |
|
361 | 352 | if m_func.__doc__: |
|
362 | 353 | if brief: |
|
363 | 354 | m_docs[m_name] = m_func.__doc__.split('\n', 1)[0] |
|
364 | 355 | else: |
|
365 | 356 | m_docs[m_name] = m_func.__doc__.rstrip() |
|
366 | 357 | else: |
|
367 | 358 | m_docs[m_name] = missing |
|
368 | 359 | docs[m_type] = m_docs |
|
369 | 360 | return docs |
|
370 | 361 | |
|
371 | 362 | def register(self, *magic_objects): |
|
372 | 363 | """Register one or more instances of Magics. |
|
373 | 364 | |
|
374 | 365 | Take one or more classes or instances of classes that subclass the main |
|
375 | 366 | `core.Magic` class, and register them with IPython to use the magic |
|
376 | 367 | functions they provide. The registration process will then ensure that |
|
377 | 368 | any methods that have decorated to provide line and/or cell magics will |
|
378 | 369 | be recognized with the `%x`/`%%x` syntax as a line/cell magic |
|
379 | 370 | respectively. |
|
380 | 371 | |
|
381 | 372 | If classes are given, they will be instantiated with the default |
|
382 | 373 | constructor. If your classes need a custom constructor, you should |
|
383 | 374 | instanitate them first and pass the instance. |
|
384 | 375 | |
|
385 | 376 | The provided arguments can be an arbitrary mix of classes and instances. |
|
386 | 377 | |
|
387 | 378 | Parameters |
|
388 | 379 | ---------- |
|
389 | 380 | magic_objects : one or more classes or instances |
|
390 | 381 | """ |
|
391 | 382 | # Start by validating them to ensure they have all had their magic |
|
392 | 383 | # methods registered at the instance level |
|
393 | 384 | for m in magic_objects: |
|
394 | 385 | if not m.registered: |
|
395 | 386 | raise ValueError("Class of magics %r was constructed without " |
|
396 | 387 | "the @register_magics class decorator") |
|
397 | 388 | if type(m) in (type, MetaHasTraits): |
|
398 | 389 | # If we're given an uninstantiated class |
|
399 | 390 | m = m(shell=self.shell) |
|
400 | 391 | |
|
401 | 392 | # Now that we have an instance, we can register it and update the |
|
402 | 393 | # table of callables |
|
403 | 394 | self.registry[m.__class__.__name__] = m |
|
404 | 395 | for mtype in magic_kinds: |
|
405 | 396 | self.magics[mtype].update(m.magics[mtype]) |
|
406 | 397 | |
|
407 | 398 | def register_function(self, func, magic_kind='line', magic_name=None): |
|
408 | 399 | """Expose a standalone function as magic function for IPython. |
|
409 | 400 | |
|
410 | 401 | This will create an IPython magic (line, cell or both) from a |
|
411 | 402 | standalone function. The functions should have the following |
|
412 | 403 | signatures: |
|
413 | 404 | |
|
414 | 405 | * For line magics: `def f(line)` |
|
415 | 406 | * For cell magics: `def f(line, cell)` |
|
416 | 407 | * For a function that does both: `def f(line, cell=None)` |
|
417 | 408 | |
|
418 | 409 | In the latter case, the function will be called with `cell==None` when |
|
419 | 410 | invoked as `%f`, and with cell as a string when invoked as `%%f`. |
|
420 | 411 | |
|
421 | 412 | Parameters |
|
422 | 413 | ---------- |
|
423 | 414 | func : callable |
|
424 | 415 | Function to be registered as a magic. |
|
425 | 416 | |
|
426 | 417 | magic_kind : str |
|
427 | 418 | Kind of magic, one of 'line', 'cell' or 'line_cell' |
|
428 | 419 | |
|
429 | 420 | magic_name : optional str |
|
430 | 421 | If given, the name the magic will have in the IPython namespace. By |
|
431 | 422 | default, the name of the function itself is used. |
|
432 | 423 | """ |
|
433 | 424 | |
|
434 | 425 | # Create the new method in the user_magics and register it in the |
|
435 | 426 | # global table |
|
436 | 427 | validate_type(magic_kind) |
|
437 | 428 | magic_name = func.func_name if magic_name is None else magic_name |
|
438 | 429 | setattr(self.user_magics, magic_name, func) |
|
439 | 430 | record_magic(self.magics, magic_kind, magic_name, func) |
|
440 | 431 | |
|
441 | 432 | def define_magic(self, name, func): |
|
442 | 433 | """[Deprecated] Expose own function as magic function for IPython. |
|
443 | 434 | |
|
444 | 435 | Example:: |
|
445 | 436 | |
|
446 | 437 | def foo_impl(self, parameter_s=''): |
|
447 | 438 | 'My very own magic!. (Use docstrings, IPython reads them).' |
|
448 | 439 | print 'Magic function. Passed parameter is between < >:' |
|
449 | 440 | print '<%s>' % parameter_s |
|
450 | 441 | print 'The self object is:', self |
|
451 | 442 | |
|
452 | 443 | ip.define_magic('foo',foo_impl) |
|
453 | 444 | """ |
|
454 | 445 | meth = types.MethodType(func, self.user_magics) |
|
455 | 446 | setattr(self.user_magics, name, meth) |
|
456 | 447 | record_magic(self.magics, 'line', name, meth) |
|
457 | 448 | |
|
458 | 449 | def register_alias(self, alias_name, magic_name, magic_kind='line'): |
|
459 | 450 | """Register an alias to a magic function. |
|
460 | 451 | |
|
461 | 452 | The alias is an instance of :class:`MagicAlias`, which holds the |
|
462 | 453 | name and kind of the magic it should call. Binding is done at |
|
463 | 454 | call time, so if the underlying magic function is changed the alias |
|
464 | 455 | will call the new function. |
|
465 | 456 | |
|
466 | 457 | Parameters |
|
467 | 458 | ---------- |
|
468 | 459 | alias_name : str |
|
469 | 460 | The name of the magic to be registered. |
|
470 | 461 | |
|
471 | 462 | magic_name : str |
|
472 | 463 | The name of an existing magic. |
|
473 | 464 | |
|
474 | 465 | magic_kind : str |
|
475 | 466 | Kind of magic, one of 'line' or 'cell' |
|
476 | 467 | """ |
|
477 | 468 | |
|
478 | 469 | # `validate_type` is too permissive, as it allows 'line_cell' |
|
479 | 470 | # which we do not handle. |
|
480 | 471 | if magic_kind not in magic_kinds: |
|
481 | 472 | raise ValueError('magic_kind must be one of %s, %s given' % |
|
482 | 473 | magic_kinds, magic_kind) |
|
483 | 474 | |
|
484 | 475 | alias = MagicAlias(self.shell, magic_name, magic_kind) |
|
485 | 476 | setattr(self.user_magics, alias_name, alias) |
|
486 | 477 | record_magic(self.magics, magic_kind, alias_name, alias) |
|
487 | 478 | |
|
488 | 479 | # Key base class that provides the central functionality for magics. |
|
489 | 480 | |
|
490 | 481 | class Magics(object): |
|
491 | 482 | """Base class for implementing magic functions. |
|
492 | 483 | |
|
493 | 484 | Shell functions which can be reached as %function_name. All magic |
|
494 | 485 | functions should accept a string, which they can parse for their own |
|
495 | 486 | needs. This can make some functions easier to type, eg `%cd ../` |
|
496 | 487 | vs. `%cd("../")` |
|
497 | 488 | |
|
498 | 489 | Classes providing magic functions need to subclass this class, and they |
|
499 | 490 | MUST: |
|
500 | 491 | |
|
501 | 492 | - Use the method decorators `@line_magic` and `@cell_magic` to decorate |
|
502 | 493 | individual methods as magic functions, AND |
|
503 | 494 | |
|
504 | 495 | - Use the class decorator `@magics_class` to ensure that the magic |
|
505 | 496 | methods are properly registered at the instance level upon instance |
|
506 | 497 | initialization. |
|
507 | 498 | |
|
508 | 499 | See :mod:`magic_functions` for examples of actual implementation classes. |
|
509 | 500 | """ |
|
510 | 501 | # Dict holding all command-line options for each magic. |
|
511 | 502 | options_table = None |
|
512 | 503 | # Dict for the mapping of magic names to methods, set by class decorator |
|
513 | 504 | magics = None |
|
514 | 505 | # Flag to check that the class decorator was properly applied |
|
515 | 506 | registered = False |
|
516 | 507 | # Instance of IPython shell |
|
517 | 508 | shell = None |
|
518 | 509 | |
|
519 | 510 | def __init__(self, shell): |
|
520 | 511 | if not(self.__class__.registered): |
|
521 | 512 | raise ValueError('Magics subclass without registration - ' |
|
522 | 513 | 'did you forget to apply @magics_class?') |
|
523 | 514 | self.shell = shell |
|
524 | 515 | self.options_table = {} |
|
525 | 516 | # The method decorators are run when the instance doesn't exist yet, so |
|
526 | 517 | # they can only record the names of the methods they are supposed to |
|
527 | 518 | # grab. Only now, that the instance exists, can we create the proper |
|
528 | 519 | # mapping to bound methods. So we read the info off the original names |
|
529 | 520 | # table and replace each method name by the actual bound method. |
|
530 | 521 | # But we mustn't clobber the *class* mapping, in case of multiple instances. |
|
531 | 522 | class_magics = self.magics |
|
532 | 523 | self.magics = {} |
|
533 | 524 | for mtype in magic_kinds: |
|
534 | 525 | tab = self.magics[mtype] = {} |
|
535 | 526 | cls_tab = class_magics[mtype] |
|
536 | 527 | for magic_name, meth_name in cls_tab.iteritems(): |
|
537 | 528 | if isinstance(meth_name, basestring): |
|
538 | 529 | # it's a method name, grab it |
|
539 | 530 | tab[magic_name] = getattr(self, meth_name) |
|
540 | 531 | else: |
|
541 | 532 | # it's the real thing |
|
542 | 533 | tab[magic_name] = meth_name |
|
543 | 534 | |
|
544 | 535 | def arg_err(self,func): |
|
545 | 536 | """Print docstring if incorrect arguments were passed""" |
|
546 | 537 | print 'Error in arguments:' |
|
547 | 538 | print oinspect.getdoc(func) |
|
548 | 539 | |
|
549 | 540 | def format_latex(self, strng): |
|
550 | 541 | """Format a string for latex inclusion.""" |
|
551 | 542 | |
|
552 | 543 | # Characters that need to be escaped for latex: |
|
553 | 544 | escape_re = re.compile(r'(%|_|\$|#|&)',re.MULTILINE) |
|
554 | 545 | # Magic command names as headers: |
|
555 | 546 | cmd_name_re = re.compile(r'^(%s.*?):' % ESC_MAGIC, |
|
556 | 547 | re.MULTILINE) |
|
557 | 548 | # Magic commands |
|
558 | 549 | cmd_re = re.compile(r'(?P<cmd>%s.+?\b)(?!\}\}:)' % ESC_MAGIC, |
|
559 | 550 | re.MULTILINE) |
|
560 | 551 | # Paragraph continue |
|
561 | 552 | par_re = re.compile(r'\\$',re.MULTILINE) |
|
562 | 553 | |
|
563 | 554 | # The "\n" symbol |
|
564 | 555 | newline_re = re.compile(r'\\n') |
|
565 | 556 | |
|
566 | 557 | # Now build the string for output: |
|
567 | 558 | #strng = cmd_name_re.sub(r'\n\\texttt{\\textsl{\\large \1}}:',strng) |
|
568 | 559 | strng = cmd_name_re.sub(r'\n\\bigskip\n\\texttt{\\textbf{ \1}}:', |
|
569 | 560 | strng) |
|
570 | 561 | strng = cmd_re.sub(r'\\texttt{\g<cmd>}',strng) |
|
571 | 562 | strng = par_re.sub(r'\\\\',strng) |
|
572 | 563 | strng = escape_re.sub(r'\\\1',strng) |
|
573 | 564 | strng = newline_re.sub(r'\\textbackslash{}n',strng) |
|
574 | 565 | return strng |
|
575 | 566 | |
|
576 | 567 | def parse_options(self, arg_str, opt_str, *long_opts, **kw): |
|
577 | 568 | """Parse options passed to an argument string. |
|
578 | 569 | |
|
579 | 570 | The interface is similar to that of getopt(), but it returns back a |
|
580 | 571 | Struct with the options as keys and the stripped argument string still |
|
581 | 572 | as a string. |
|
582 | 573 | |
|
583 | 574 | arg_str is quoted as a true sys.argv vector by using shlex.split. |
|
584 | 575 | This allows us to easily expand variables, glob files, quote |
|
585 | 576 | arguments, etc. |
|
586 | 577 | |
|
587 | 578 | Options: |
|
588 | 579 | -mode: default 'string'. If given as 'list', the argument string is |
|
589 | 580 | returned as a list (split on whitespace) instead of a string. |
|
590 | 581 | |
|
591 | 582 | -list_all: put all option values in lists. Normally only options |
|
592 | 583 | appearing more than once are put in a list. |
|
593 | 584 | |
|
594 | 585 | -posix (True): whether to split the input line in POSIX mode or not, |
|
595 | 586 | as per the conventions outlined in the shlex module from the |
|
596 | 587 | standard library.""" |
|
597 | 588 | |
|
598 | 589 | # inject default options at the beginning of the input line |
|
599 | 590 | caller = sys._getframe(1).f_code.co_name |
|
600 | 591 | arg_str = '%s %s' % (self.options_table.get(caller,''),arg_str) |
|
601 | 592 | |
|
602 | 593 | mode = kw.get('mode','string') |
|
603 | 594 | if mode not in ['string','list']: |
|
604 | 595 | raise ValueError('incorrect mode given: %s' % mode) |
|
605 | 596 | # Get options |
|
606 | 597 | list_all = kw.get('list_all',0) |
|
607 | 598 | posix = kw.get('posix', os.name == 'posix') |
|
608 | 599 | strict = kw.get('strict', True) |
|
609 | 600 | |
|
610 | 601 | # Check if we have more than one argument to warrant extra processing: |
|
611 | 602 | odict = {} # Dictionary with options |
|
612 | 603 | args = arg_str.split() |
|
613 | 604 | if len(args) >= 1: |
|
614 | 605 | # If the list of inputs only has 0 or 1 thing in it, there's no |
|
615 | 606 | # need to look for options |
|
616 | 607 | argv = arg_split(arg_str, posix, strict) |
|
617 | 608 | # Do regular option processing |
|
618 | 609 | try: |
|
619 | 610 | opts,args = getopt(argv, opt_str, long_opts) |
|
620 | 611 | except GetoptError as e: |
|
621 | 612 | raise UsageError('%s ( allowed: "%s" %s)' % (e.msg,opt_str, |
|
622 | 613 | " ".join(long_opts))) |
|
623 | 614 | for o,a in opts: |
|
624 | 615 | if o.startswith('--'): |
|
625 | 616 | o = o[2:] |
|
626 | 617 | else: |
|
627 | 618 | o = o[1:] |
|
628 | 619 | try: |
|
629 | 620 | odict[o].append(a) |
|
630 | 621 | except AttributeError: |
|
631 | 622 | odict[o] = [odict[o],a] |
|
632 | 623 | except KeyError: |
|
633 | 624 | if list_all: |
|
634 | 625 | odict[o] = [a] |
|
635 | 626 | else: |
|
636 | 627 | odict[o] = a |
|
637 | 628 | |
|
638 | 629 | # Prepare opts,args for return |
|
639 | 630 | opts = Struct(odict) |
|
640 | 631 | if mode == 'string': |
|
641 | 632 | args = ' '.join(args) |
|
642 | 633 | |
|
643 | 634 | return opts,args |
|
644 | 635 | |
|
645 | 636 | def default_option(self, fn, optstr): |
|
646 | 637 | """Make an entry in the options_table for fn, with value optstr""" |
|
647 | 638 | |
|
648 | 639 | if fn not in self.lsmagic(): |
|
649 | 640 | error("%s is not a magic function" % fn) |
|
650 | 641 | self.options_table[fn] = optstr |
|
651 | 642 | |
|
652 | 643 | class MagicAlias(object): |
|
653 | 644 | """An alias to another magic function. |
|
654 | 645 | |
|
655 | 646 | An alias is determined by its magic name and magic kind. Lookup |
|
656 | 647 | is done at call time, so if the underlying magic changes the alias |
|
657 | 648 | will call the new function. |
|
658 | 649 | |
|
659 | 650 | Use the :meth:`MagicsManager.register_alias` method or the |
|
660 | 651 | `%alias_magic` magic function to create and register a new alias. |
|
661 | 652 | """ |
|
662 | 653 | def __init__(self, shell, magic_name, magic_kind): |
|
663 | 654 | self.shell = shell |
|
664 | 655 | self.magic_name = magic_name |
|
665 | 656 | self.magic_kind = magic_kind |
|
666 | 657 | |
|
667 | 658 | self.pretty_target = '%s%s' % (magic_escapes[self.magic_kind], self.magic_name) |
|
668 | 659 | self.__doc__ = "Alias for `%s`." % self.pretty_target |
|
669 | 660 | |
|
670 | 661 | self._in_call = False |
|
671 | 662 | |
|
672 | 663 | def __call__(self, *args, **kwargs): |
|
673 | 664 | """Call the magic alias.""" |
|
674 | 665 | fn = self.shell.find_magic(self.magic_name, self.magic_kind) |
|
675 | 666 | if fn is None: |
|
676 | 667 | raise UsageError("Magic `%s` not found." % self.pretty_target) |
|
677 | 668 | |
|
678 | 669 | # Protect against infinite recursion. |
|
679 | 670 | if self._in_call: |
|
680 | 671 | raise UsageError("Infinite recursion detected; " |
|
681 | 672 | "magic aliases cannot call themselves.") |
|
682 | 673 | self._in_call = True |
|
683 | 674 | try: |
|
684 | 675 | return fn(*args, **kwargs) |
|
685 | 676 | finally: |
|
686 | 677 | self._in_call = False |
@@ -1,612 +1,648 b'' | |||
|
1 | 1 | """Implementation of basic magic functions. |
|
2 | 2 | """ |
|
3 | 3 | #----------------------------------------------------------------------------- |
|
4 | 4 | # Copyright (c) 2012 The IPython Development Team. |
|
5 | 5 | # |
|
6 | 6 | # Distributed under the terms of the Modified BSD License. |
|
7 | 7 | # |
|
8 | 8 | # The full license is in the file COPYING.txt, distributed with this software. |
|
9 | 9 | #----------------------------------------------------------------------------- |
|
10 | 10 | |
|
11 | 11 | #----------------------------------------------------------------------------- |
|
12 | 12 | # Imports |
|
13 | 13 | #----------------------------------------------------------------------------- |
|
14 | 14 | from __future__ import print_function |
|
15 | 15 | |
|
16 | 16 | # Stdlib |
|
17 | 17 | import io |
|
18 | import json | |
|
18 | 19 | import sys |
|
19 | 20 | from pprint import pformat |
|
20 | 21 | |
|
21 | 22 | # Our own packages |
|
22 | 23 | from IPython.core import magic_arguments |
|
23 | 24 | from IPython.core.error import UsageError |
|
24 | 25 | from IPython.core.magic import Magics, magics_class, line_magic, magic_escapes |
|
25 | 26 | from IPython.utils.text import format_screen, dedent, indent |
|
26 | 27 | from IPython.core import magic_arguments, page |
|
27 | 28 | from IPython.testing.skipdoctest import skip_doctest |
|
28 | 29 | from IPython.utils.ipstruct import Struct |
|
29 | 30 | from IPython.utils.path import unquote_filename |
|
30 | 31 | from IPython.utils.warn import warn, error |
|
31 | 32 | |
|
32 | 33 | #----------------------------------------------------------------------------- |
|
33 | 34 | # Magics class implementation |
|
34 | 35 | #----------------------------------------------------------------------------- |
|
35 | 36 | |
|
37 | class MagicsDisplay(object): | |
|
38 | def __init__(self, magics_manager): | |
|
39 | self.magics_manager = magics_manager | |
|
40 | ||
|
41 | def _lsmagic(self): | |
|
42 | """The main implementation of the %lsmagic""" | |
|
43 | mesc = magic_escapes['line'] | |
|
44 | cesc = magic_escapes['cell'] | |
|
45 | mman = self.magics_manager | |
|
46 | magics = mman.lsmagic() | |
|
47 | out = ['Available line magics:', | |
|
48 | mesc + (' '+mesc).join(sorted(magics['line'])), | |
|
49 | '', | |
|
50 | 'Available cell magics:', | |
|
51 | cesc + (' '+cesc).join(sorted(magics['cell'])), | |
|
52 | '', | |
|
53 | mman.auto_status()] | |
|
54 | return '\n'.join(out) | |
|
55 | ||
|
56 | def _repr_pretty_(self, p, cycle): | |
|
57 | p.text(self._lsmagic()) | |
|
58 | ||
|
59 | def __str__(self): | |
|
60 | return self._lsmagic() | |
|
61 | ||
|
62 | def _jsonable(self): | |
|
63 | """turn magics dict into jsonable dict of the same structure | |
|
64 | ||
|
65 | replaces object instances with their class names as strings | |
|
66 | """ | |
|
67 | magic_dict = {} | |
|
68 | mman = self.magics_manager | |
|
69 | magics = mman.lsmagic() | |
|
70 | for key, subdict in magics.items(): | |
|
71 | d = {} | |
|
72 | magic_dict[key] = d | |
|
73 | for name, obj in subdict.items(): | |
|
74 | try: | |
|
75 | classname = obj.im_class.__name__ | |
|
76 | except AttributeError: | |
|
77 | classname = 'Other' | |
|
78 | ||
|
79 | d[name] = classname | |
|
80 | return magic_dict | |
|
81 | ||
|
82 | def _repr_json_(self): | |
|
83 | return json.dumps(self._jsonable()) | |
|
84 | ||
|
85 | ||
|
36 | 86 | @magics_class |
|
37 | 87 | class BasicMagics(Magics): |
|
38 | 88 | """Magics that provide central IPython functionality. |
|
39 | 89 | |
|
40 | 90 | These are various magics that don't fit into specific categories but that |
|
41 | 91 | are all part of the base 'IPython experience'.""" |
|
42 | 92 | |
|
43 | 93 | @magic_arguments.magic_arguments() |
|
44 | 94 | @magic_arguments.argument( |
|
45 | 95 | '-l', '--line', action='store_true', |
|
46 | 96 | help="""Create a line magic alias.""" |
|
47 | 97 | ) |
|
48 | 98 | @magic_arguments.argument( |
|
49 | 99 | '-c', '--cell', action='store_true', |
|
50 | 100 | help="""Create a cell magic alias.""" |
|
51 | 101 | ) |
|
52 | 102 | @magic_arguments.argument( |
|
53 | 103 | 'name', |
|
54 | 104 | help="""Name of the magic to be created.""" |
|
55 | 105 | ) |
|
56 | 106 | @magic_arguments.argument( |
|
57 | 107 | 'target', |
|
58 | 108 | help="""Name of the existing line or cell magic.""" |
|
59 | 109 | ) |
|
60 | 110 | @line_magic |
|
61 | 111 | def alias_magic(self, line=''): |
|
62 | 112 | """Create an alias for an existing line or cell magic. |
|
63 | 113 | |
|
64 | 114 | Examples |
|
65 | 115 | -------- |
|
66 | 116 | :: |
|
67 | 117 | In [1]: %alias_magic t timeit |
|
68 | 118 | Created `%t` as an alias for `%timeit`. |
|
69 | 119 | Created `%%t` as an alias for `%%timeit`. |
|
70 | 120 | |
|
71 | 121 | In [2]: %t -n1 pass |
|
72 | 122 | 1 loops, best of 3: 954 ns per loop |
|
73 | 123 | |
|
74 | 124 | In [3]: %%t -n1 |
|
75 | 125 | ...: pass |
|
76 | 126 | ...: |
|
77 | 127 | 1 loops, best of 3: 954 ns per loop |
|
78 | 128 | |
|
79 | 129 | In [4]: %alias_magic --cell whereami pwd |
|
80 | 130 | UsageError: Cell magic function `%%pwd` not found. |
|
81 | 131 | In [5]: %alias_magic --line whereami pwd |
|
82 | 132 | Created `%whereami` as an alias for `%pwd`. |
|
83 | 133 | |
|
84 | 134 | In [6]: %whereami |
|
85 | 135 | Out[6]: u'/home/testuser' |
|
86 | 136 | """ |
|
87 | 137 | args = magic_arguments.parse_argstring(self.alias_magic, line) |
|
88 | 138 | shell = self.shell |
|
89 | 139 | mman = self.shell.magics_manager |
|
90 | 140 | escs = ''.join(magic_escapes.values()) |
|
91 | 141 | |
|
92 | 142 | target = args.target.lstrip(escs) |
|
93 | 143 | name = args.name.lstrip(escs) |
|
94 | 144 | |
|
95 | 145 | # Find the requested magics. |
|
96 | 146 | m_line = shell.find_magic(target, 'line') |
|
97 | 147 | m_cell = shell.find_magic(target, 'cell') |
|
98 | 148 | if args.line and m_line is None: |
|
99 | 149 | raise UsageError('Line magic function `%s%s` not found.' % |
|
100 | 150 | (magic_escapes['line'], target)) |
|
101 | 151 | if args.cell and m_cell is None: |
|
102 | 152 | raise UsageError('Cell magic function `%s%s` not found.' % |
|
103 | 153 | (magic_escapes['cell'], target)) |
|
104 | 154 | |
|
105 | 155 | # If --line and --cell are not specified, default to the ones |
|
106 | 156 | # that are available. |
|
107 | 157 | if not args.line and not args.cell: |
|
108 | 158 | if not m_line and not m_cell: |
|
109 | 159 | raise UsageError( |
|
110 | 160 | 'No line or cell magic with name `%s` found.' % target |
|
111 | 161 | ) |
|
112 | 162 | args.line = bool(m_line) |
|
113 | 163 | args.cell = bool(m_cell) |
|
114 | 164 | |
|
115 | 165 | if args.line: |
|
116 | 166 | mman.register_alias(name, target, 'line') |
|
117 | 167 | print('Created `%s%s` as an alias for `%s%s`.' % ( |
|
118 | 168 | magic_escapes['line'], name, |
|
119 | 169 | magic_escapes['line'], target)) |
|
120 | 170 | |
|
121 | 171 | if args.cell: |
|
122 | 172 | mman.register_alias(name, target, 'cell') |
|
123 | 173 | print('Created `%s%s` as an alias for `%s%s`.' % ( |
|
124 | 174 | magic_escapes['cell'], name, |
|
125 | 175 | magic_escapes['cell'], target)) |
|
126 | 176 | |
|
127 | def _lsmagic(self): | |
|
128 | mesc = magic_escapes['line'] | |
|
129 | cesc = magic_escapes['cell'] | |
|
130 | mman = self.shell.magics_manager | |
|
131 | magics = mman.lsmagic() | |
|
132 | out = ['Available line magics:', | |
|
133 | mesc + (' '+mesc).join(sorted(magics['line'])), | |
|
134 | '', | |
|
135 | 'Available cell magics:', | |
|
136 | cesc + (' '+cesc).join(sorted(magics['cell'])), | |
|
137 | '', | |
|
138 | mman.auto_status()] | |
|
139 | return '\n'.join(out) | |
|
140 | ||
|
141 | 177 | @line_magic |
|
142 | 178 | def lsmagic(self, parameter_s=''): |
|
143 | 179 | """List currently available magic functions.""" |
|
144 | print(self._lsmagic()) | |
|
180 | return MagicsDisplay(self.shell.magics_manager) | |
|
145 | 181 | |
|
146 | 182 | def _magic_docs(self, brief=False, rest=False): |
|
147 | 183 | """Return docstrings from magic functions.""" |
|
148 | 184 | mman = self.shell.magics_manager |
|
149 | 185 | docs = mman.lsmagic_docs(brief, missing='No documentation') |
|
150 | 186 | |
|
151 | 187 | if rest: |
|
152 | 188 | format_string = '**%s%s**::\n\n%s\n\n' |
|
153 | 189 | else: |
|
154 | 190 | format_string = '%s%s:\n%s\n' |
|
155 | 191 | |
|
156 | 192 | return ''.join( |
|
157 | 193 | [format_string % (magic_escapes['line'], fname, |
|
158 | 194 | indent(dedent(fndoc))) |
|
159 | 195 | for fname, fndoc in sorted(docs['line'].items())] |
|
160 | 196 | + |
|
161 | 197 | [format_string % (magic_escapes['cell'], fname, |
|
162 | 198 | indent(dedent(fndoc))) |
|
163 | 199 | for fname, fndoc in sorted(docs['cell'].items())] |
|
164 | 200 | ) |
|
165 | 201 | |
|
166 | 202 | @line_magic |
|
167 | 203 | def magic(self, parameter_s=''): |
|
168 | 204 | """Print information about the magic function system. |
|
169 | 205 | |
|
170 | 206 | Supported formats: -latex, -brief, -rest |
|
171 | 207 | """ |
|
172 | 208 | |
|
173 | 209 | mode = '' |
|
174 | 210 | try: |
|
175 | 211 | mode = parameter_s.split()[0][1:] |
|
176 | 212 | if mode == 'rest': |
|
177 | 213 | rest_docs = [] |
|
178 | 214 | except IndexError: |
|
179 | 215 | pass |
|
180 | 216 | |
|
181 | 217 | brief = (mode == 'brief') |
|
182 | 218 | rest = (mode == 'rest') |
|
183 | 219 | magic_docs = self._magic_docs(brief, rest) |
|
184 | 220 | |
|
185 | 221 | if mode == 'latex': |
|
186 | 222 | print(self.format_latex(magic_docs)) |
|
187 | 223 | return |
|
188 | 224 | else: |
|
189 | 225 | magic_docs = format_screen(magic_docs) |
|
190 | 226 | |
|
191 | 227 | out = [""" |
|
192 | 228 | IPython's 'magic' functions |
|
193 | 229 | =========================== |
|
194 | 230 | |
|
195 | 231 | The magic function system provides a series of functions which allow you to |
|
196 | 232 | control the behavior of IPython itself, plus a lot of system-type |
|
197 | 233 | features. There are two kinds of magics, line-oriented and cell-oriented. |
|
198 | 234 | |
|
199 | 235 | Line magics are prefixed with the % character and work much like OS |
|
200 | 236 | command-line calls: they get as an argument the rest of the line, where |
|
201 | 237 | arguments are passed without parentheses or quotes. For example, this will |
|
202 | 238 | time the given statement:: |
|
203 | 239 | |
|
204 | 240 | %timeit range(1000) |
|
205 | 241 | |
|
206 | 242 | Cell magics are prefixed with a double %%, and they are functions that get as |
|
207 | 243 | an argument not only the rest of the line, but also the lines below it in a |
|
208 | 244 | separate argument. These magics are called with two arguments: the rest of the |
|
209 | 245 | call line and the body of the cell, consisting of the lines below the first. |
|
210 | 246 | For example:: |
|
211 | 247 | |
|
212 | 248 | %%timeit x = numpy.random.randn((100, 100)) |
|
213 | 249 | numpy.linalg.svd(x) |
|
214 | 250 | |
|
215 | 251 | will time the execution of the numpy svd routine, running the assignment of x |
|
216 | 252 | as part of the setup phase, which is not timed. |
|
217 | 253 | |
|
218 | 254 | In a line-oriented client (the terminal or Qt console IPython), starting a new |
|
219 | 255 | input with %% will automatically enter cell mode, and IPython will continue |
|
220 | 256 | reading input until a blank line is given. In the notebook, simply type the |
|
221 | 257 | whole cell as one entity, but keep in mind that the %% escape can only be at |
|
222 | 258 | the very start of the cell. |
|
223 | 259 | |
|
224 | 260 | NOTE: If you have 'automagic' enabled (via the command line option or with the |
|
225 | 261 | %automagic function), you don't need to type in the % explicitly for line |
|
226 | 262 | magics; cell magics always require an explicit '%%' escape. By default, |
|
227 | 263 | IPython ships with automagic on, so you should only rarely need the % escape. |
|
228 | 264 | |
|
229 | 265 | Example: typing '%cd mydir' (without the quotes) changes you working directory |
|
230 | 266 | to 'mydir', if it exists. |
|
231 | 267 | |
|
232 | 268 | For a list of the available magic functions, use %lsmagic. For a description |
|
233 | 269 | of any of them, type %magic_name?, e.g. '%cd?'. |
|
234 | 270 | |
|
235 | 271 | Currently the magic system has the following functions:""", |
|
236 | 272 | magic_docs, |
|
237 | 273 | "Summary of magic functions (from %slsmagic):" % magic_escapes['line'], |
|
238 | 274 | self._lsmagic(), |
|
239 | 275 | ] |
|
240 | 276 | page.page('\n'.join(out)) |
|
241 | 277 | |
|
242 | 278 | |
|
243 | 279 | @line_magic |
|
244 | 280 | def page(self, parameter_s=''): |
|
245 | 281 | """Pretty print the object and display it through a pager. |
|
246 | 282 | |
|
247 | 283 | %page [options] OBJECT |
|
248 | 284 | |
|
249 | 285 | If no object is given, use _ (last output). |
|
250 | 286 | |
|
251 | 287 | Options: |
|
252 | 288 | |
|
253 | 289 | -r: page str(object), don't pretty-print it.""" |
|
254 | 290 | |
|
255 | 291 | # After a function contributed by Olivier Aubert, slightly modified. |
|
256 | 292 | |
|
257 | 293 | # Process options/args |
|
258 | 294 | opts, args = self.parse_options(parameter_s, 'r') |
|
259 | 295 | raw = 'r' in opts |
|
260 | 296 | |
|
261 | 297 | oname = args and args or '_' |
|
262 | 298 | info = self.shell._ofind(oname) |
|
263 | 299 | if info['found']: |
|
264 | 300 | txt = (raw and str or pformat)( info['obj'] ) |
|
265 | 301 | page.page(txt) |
|
266 | 302 | else: |
|
267 | 303 | print('Object `%s` not found' % oname) |
|
268 | 304 | |
|
269 | 305 | @line_magic |
|
270 | 306 | def profile(self, parameter_s=''): |
|
271 | 307 | """Print your currently active IPython profile.""" |
|
272 | 308 | from IPython.core.application import BaseIPythonApplication |
|
273 | 309 | if BaseIPythonApplication.initialized(): |
|
274 | 310 | print(BaseIPythonApplication.instance().profile) |
|
275 | 311 | else: |
|
276 | 312 | error("profile is an application-level value, but you don't appear to be in an IPython application") |
|
277 | 313 | |
|
278 | 314 | @line_magic |
|
279 | 315 | def pprint(self, parameter_s=''): |
|
280 | 316 | """Toggle pretty printing on/off.""" |
|
281 | 317 | ptformatter = self.shell.display_formatter.formatters['text/plain'] |
|
282 | 318 | ptformatter.pprint = bool(1 - ptformatter.pprint) |
|
283 | 319 | print('Pretty printing has been turned', |
|
284 | 320 | ['OFF','ON'][ptformatter.pprint]) |
|
285 | 321 | |
|
286 | 322 | @line_magic |
|
287 | 323 | def colors(self, parameter_s=''): |
|
288 | 324 | """Switch color scheme for prompts, info system and exception handlers. |
|
289 | 325 | |
|
290 | 326 | Currently implemented schemes: NoColor, Linux, LightBG. |
|
291 | 327 | |
|
292 | 328 | Color scheme names are not case-sensitive. |
|
293 | 329 | |
|
294 | 330 | Examples |
|
295 | 331 | -------- |
|
296 | 332 | To get a plain black and white terminal:: |
|
297 | 333 | |
|
298 | 334 | %colors nocolor |
|
299 | 335 | """ |
|
300 | 336 | def color_switch_err(name): |
|
301 | 337 | warn('Error changing %s color schemes.\n%s' % |
|
302 | 338 | (name, sys.exc_info()[1])) |
|
303 | 339 | |
|
304 | 340 | |
|
305 | 341 | new_scheme = parameter_s.strip() |
|
306 | 342 | if not new_scheme: |
|
307 | 343 | raise UsageError( |
|
308 | 344 | "%colors: you must specify a color scheme. See '%colors?'") |
|
309 | 345 | return |
|
310 | 346 | # local shortcut |
|
311 | 347 | shell = self.shell |
|
312 | 348 | |
|
313 | 349 | import IPython.utils.rlineimpl as readline |
|
314 | 350 | |
|
315 | 351 | if not shell.colors_force and \ |
|
316 | 352 | not readline.have_readline and \ |
|
317 | 353 | (sys.platform == "win32" or sys.platform == "cli"): |
|
318 | 354 | msg = """\ |
|
319 | 355 | Proper color support under MS Windows requires the pyreadline library. |
|
320 | 356 | You can find it at: |
|
321 | 357 | http://ipython.org/pyreadline.html |
|
322 | 358 | Gary's readline needs the ctypes module, from: |
|
323 | 359 | http://starship.python.net/crew/theller/ctypes |
|
324 | 360 | (Note that ctypes is already part of Python versions 2.5 and newer). |
|
325 | 361 | |
|
326 | 362 | Defaulting color scheme to 'NoColor'""" |
|
327 | 363 | new_scheme = 'NoColor' |
|
328 | 364 | warn(msg) |
|
329 | 365 | |
|
330 | 366 | # readline option is 0 |
|
331 | 367 | if not shell.colors_force and not shell.has_readline: |
|
332 | 368 | new_scheme = 'NoColor' |
|
333 | 369 | |
|
334 | 370 | # Set prompt colors |
|
335 | 371 | try: |
|
336 | 372 | shell.prompt_manager.color_scheme = new_scheme |
|
337 | 373 | except: |
|
338 | 374 | color_switch_err('prompt') |
|
339 | 375 | else: |
|
340 | 376 | shell.colors = \ |
|
341 | 377 | shell.prompt_manager.color_scheme_table.active_scheme_name |
|
342 | 378 | # Set exception colors |
|
343 | 379 | try: |
|
344 | 380 | shell.InteractiveTB.set_colors(scheme = new_scheme) |
|
345 | 381 | shell.SyntaxTB.set_colors(scheme = new_scheme) |
|
346 | 382 | except: |
|
347 | 383 | color_switch_err('exception') |
|
348 | 384 | |
|
349 | 385 | # Set info (for 'object?') colors |
|
350 | 386 | if shell.color_info: |
|
351 | 387 | try: |
|
352 | 388 | shell.inspector.set_active_scheme(new_scheme) |
|
353 | 389 | except: |
|
354 | 390 | color_switch_err('object inspector') |
|
355 | 391 | else: |
|
356 | 392 | shell.inspector.set_active_scheme('NoColor') |
|
357 | 393 | |
|
358 | 394 | @line_magic |
|
359 | 395 | def xmode(self, parameter_s=''): |
|
360 | 396 | """Switch modes for the exception handlers. |
|
361 | 397 | |
|
362 | 398 | Valid modes: Plain, Context and Verbose. |
|
363 | 399 | |
|
364 | 400 | If called without arguments, acts as a toggle.""" |
|
365 | 401 | |
|
366 | 402 | def xmode_switch_err(name): |
|
367 | 403 | warn('Error changing %s exception modes.\n%s' % |
|
368 | 404 | (name,sys.exc_info()[1])) |
|
369 | 405 | |
|
370 | 406 | shell = self.shell |
|
371 | 407 | new_mode = parameter_s.strip().capitalize() |
|
372 | 408 | try: |
|
373 | 409 | shell.InteractiveTB.set_mode(mode=new_mode) |
|
374 | 410 | print('Exception reporting mode:',shell.InteractiveTB.mode) |
|
375 | 411 | except: |
|
376 | 412 | xmode_switch_err('user') |
|
377 | 413 | |
|
378 | 414 | @line_magic |
|
379 | 415 | def quickref(self,arg): |
|
380 | 416 | """ Show a quick reference sheet """ |
|
381 | 417 | from IPython.core.usage import quick_reference |
|
382 | 418 | qr = quick_reference + self._magic_docs(brief=True) |
|
383 | 419 | page.page(qr) |
|
384 | 420 | |
|
385 | 421 | @line_magic |
|
386 | 422 | def doctest_mode(self, parameter_s=''): |
|
387 | 423 | """Toggle doctest mode on and off. |
|
388 | 424 | |
|
389 | 425 | This mode is intended to make IPython behave as much as possible like a |
|
390 | 426 | plain Python shell, from the perspective of how its prompts, exceptions |
|
391 | 427 | and output look. This makes it easy to copy and paste parts of a |
|
392 | 428 | session into doctests. It does so by: |
|
393 | 429 | |
|
394 | 430 | - Changing the prompts to the classic ``>>>`` ones. |
|
395 | 431 | - Changing the exception reporting mode to 'Plain'. |
|
396 | 432 | - Disabling pretty-printing of output. |
|
397 | 433 | |
|
398 | 434 | Note that IPython also supports the pasting of code snippets that have |
|
399 | 435 | leading '>>>' and '...' prompts in them. This means that you can paste |
|
400 | 436 | doctests from files or docstrings (even if they have leading |
|
401 | 437 | whitespace), and the code will execute correctly. You can then use |
|
402 | 438 | '%history -t' to see the translated history; this will give you the |
|
403 | 439 | input after removal of all the leading prompts and whitespace, which |
|
404 | 440 | can be pasted back into an editor. |
|
405 | 441 | |
|
406 | 442 | With these features, you can switch into this mode easily whenever you |
|
407 | 443 | need to do testing and changes to doctests, without having to leave |
|
408 | 444 | your existing IPython session. |
|
409 | 445 | """ |
|
410 | 446 | |
|
411 | 447 | # Shorthands |
|
412 | 448 | shell = self.shell |
|
413 | 449 | pm = shell.prompt_manager |
|
414 | 450 | meta = shell.meta |
|
415 | 451 | disp_formatter = self.shell.display_formatter |
|
416 | 452 | ptformatter = disp_formatter.formatters['text/plain'] |
|
417 | 453 | # dstore is a data store kept in the instance metadata bag to track any |
|
418 | 454 | # changes we make, so we can undo them later. |
|
419 | 455 | dstore = meta.setdefault('doctest_mode',Struct()) |
|
420 | 456 | save_dstore = dstore.setdefault |
|
421 | 457 | |
|
422 | 458 | # save a few values we'll need to recover later |
|
423 | 459 | mode = save_dstore('mode',False) |
|
424 | 460 | save_dstore('rc_pprint',ptformatter.pprint) |
|
425 | 461 | save_dstore('xmode',shell.InteractiveTB.mode) |
|
426 | 462 | save_dstore('rc_separate_out',shell.separate_out) |
|
427 | 463 | save_dstore('rc_separate_out2',shell.separate_out2) |
|
428 | 464 | save_dstore('rc_prompts_pad_left',pm.justify) |
|
429 | 465 | save_dstore('rc_separate_in',shell.separate_in) |
|
430 | 466 | save_dstore('rc_active_types',disp_formatter.active_types) |
|
431 | 467 | save_dstore('prompt_templates',(pm.in_template, pm.in2_template, pm.out_template)) |
|
432 | 468 | |
|
433 | 469 | if mode == False: |
|
434 | 470 | # turn on |
|
435 | 471 | pm.in_template = '>>> ' |
|
436 | 472 | pm.in2_template = '... ' |
|
437 | 473 | pm.out_template = '' |
|
438 | 474 | |
|
439 | 475 | # Prompt separators like plain python |
|
440 | 476 | shell.separate_in = '' |
|
441 | 477 | shell.separate_out = '' |
|
442 | 478 | shell.separate_out2 = '' |
|
443 | 479 | |
|
444 | 480 | pm.justify = False |
|
445 | 481 | |
|
446 | 482 | ptformatter.pprint = False |
|
447 | 483 | disp_formatter.active_types = ['text/plain'] |
|
448 | 484 | |
|
449 | 485 | shell.magic('xmode Plain') |
|
450 | 486 | else: |
|
451 | 487 | # turn off |
|
452 | 488 | pm.in_template, pm.in2_template, pm.out_template = dstore.prompt_templates |
|
453 | 489 | |
|
454 | 490 | shell.separate_in = dstore.rc_separate_in |
|
455 | 491 | |
|
456 | 492 | shell.separate_out = dstore.rc_separate_out |
|
457 | 493 | shell.separate_out2 = dstore.rc_separate_out2 |
|
458 | 494 | |
|
459 | 495 | pm.justify = dstore.rc_prompts_pad_left |
|
460 | 496 | |
|
461 | 497 | ptformatter.pprint = dstore.rc_pprint |
|
462 | 498 | disp_formatter.active_types = dstore.rc_active_types |
|
463 | 499 | |
|
464 | 500 | shell.magic('xmode ' + dstore.xmode) |
|
465 | 501 | |
|
466 | 502 | # Store new mode and inform |
|
467 | 503 | dstore.mode = bool(1-int(mode)) |
|
468 | 504 | mode_label = ['OFF','ON'][dstore.mode] |
|
469 | 505 | print('Doctest mode is:', mode_label) |
|
470 | 506 | |
|
471 | 507 | @line_magic |
|
472 | 508 | def gui(self, parameter_s=''): |
|
473 | 509 | """Enable or disable IPython GUI event loop integration. |
|
474 | 510 | |
|
475 | 511 | %gui [GUINAME] |
|
476 | 512 | |
|
477 | 513 | This magic replaces IPython's threaded shells that were activated |
|
478 | 514 | using the (pylab/wthread/etc.) command line flags. GUI toolkits |
|
479 | 515 | can now be enabled at runtime and keyboard |
|
480 | 516 | interrupts should work without any problems. The following toolkits |
|
481 | 517 | are supported: wxPython, PyQt4, PyGTK, Tk and Cocoa (OSX):: |
|
482 | 518 | |
|
483 | 519 | %gui wx # enable wxPython event loop integration |
|
484 | 520 | %gui qt4|qt # enable PyQt4 event loop integration |
|
485 | 521 | %gui gtk # enable PyGTK event loop integration |
|
486 | 522 | %gui gtk3 # enable Gtk3 event loop integration |
|
487 | 523 | %gui tk # enable Tk event loop integration |
|
488 | 524 | %gui osx # enable Cocoa event loop integration |
|
489 | 525 | # (requires %matplotlib 1.1) |
|
490 | 526 | %gui # disable all event loop integration |
|
491 | 527 | |
|
492 | 528 | WARNING: after any of these has been called you can simply create |
|
493 | 529 | an application object, but DO NOT start the event loop yourself, as |
|
494 | 530 | we have already handled that. |
|
495 | 531 | """ |
|
496 | 532 | opts, arg = self.parse_options(parameter_s, '') |
|
497 | 533 | if arg=='': arg = None |
|
498 | 534 | try: |
|
499 | 535 | return self.shell.enable_gui(arg) |
|
500 | 536 | except Exception as e: |
|
501 | 537 | # print simple error message, rather than traceback if we can't |
|
502 | 538 | # hook up the GUI |
|
503 | 539 | error(str(e)) |
|
504 | 540 | |
|
505 | 541 | @skip_doctest |
|
506 | 542 | @line_magic |
|
507 | 543 | def precision(self, s=''): |
|
508 | 544 | """Set floating point precision for pretty printing. |
|
509 | 545 | |
|
510 | 546 | Can set either integer precision or a format string. |
|
511 | 547 | |
|
512 | 548 | If numpy has been imported and precision is an int, |
|
513 | 549 | numpy display precision will also be set, via ``numpy.set_printoptions``. |
|
514 | 550 | |
|
515 | 551 | If no argument is given, defaults will be restored. |
|
516 | 552 | |
|
517 | 553 | Examples |
|
518 | 554 | -------- |
|
519 | 555 | :: |
|
520 | 556 | |
|
521 | 557 | In [1]: from math import pi |
|
522 | 558 | |
|
523 | 559 | In [2]: %precision 3 |
|
524 | 560 | Out[2]: u'%.3f' |
|
525 | 561 | |
|
526 | 562 | In [3]: pi |
|
527 | 563 | Out[3]: 3.142 |
|
528 | 564 | |
|
529 | 565 | In [4]: %precision %i |
|
530 | 566 | Out[4]: u'%i' |
|
531 | 567 | |
|
532 | 568 | In [5]: pi |
|
533 | 569 | Out[5]: 3 |
|
534 | 570 | |
|
535 | 571 | In [6]: %precision %e |
|
536 | 572 | Out[6]: u'%e' |
|
537 | 573 | |
|
538 | 574 | In [7]: pi**10 |
|
539 | 575 | Out[7]: 9.364805e+04 |
|
540 | 576 | |
|
541 | 577 | In [8]: %precision |
|
542 | 578 | Out[8]: u'%r' |
|
543 | 579 | |
|
544 | 580 | In [9]: pi**10 |
|
545 | 581 | Out[9]: 93648.047476082982 |
|
546 | 582 | """ |
|
547 | 583 | ptformatter = self.shell.display_formatter.formatters['text/plain'] |
|
548 | 584 | ptformatter.float_precision = s |
|
549 | 585 | return ptformatter.float_format |
|
550 | 586 | |
|
551 | 587 | @magic_arguments.magic_arguments() |
|
552 | 588 | @magic_arguments.argument( |
|
553 | 589 | '-e', '--export', action='store_true', default=False, |
|
554 | 590 | help='Export IPython history as a notebook. The filename argument ' |
|
555 | 591 | 'is used to specify the notebook name and format. For example ' |
|
556 | 592 | 'a filename of notebook.ipynb will result in a notebook name ' |
|
557 | 593 | 'of "notebook" and a format of "json". Likewise using a ".py" ' |
|
558 | 594 | 'file extension will write the notebook as a Python script' |
|
559 | 595 | ) |
|
560 | 596 | @magic_arguments.argument( |
|
561 | 597 | '-f', '--format', |
|
562 | 598 | help='Convert an existing IPython notebook to a new format. This option ' |
|
563 | 599 | 'specifies the new format and can have the values: json, py. ' |
|
564 | 600 | 'The target filename is chosen automatically based on the new ' |
|
565 | 601 | 'format. The filename argument gives the name of the source file.' |
|
566 | 602 | ) |
|
567 | 603 | @magic_arguments.argument( |
|
568 | 604 | 'filename', type=unicode, |
|
569 | 605 | help='Notebook name or filename' |
|
570 | 606 | ) |
|
571 | 607 | @line_magic |
|
572 | 608 | def notebook(self, s): |
|
573 | 609 | """Export and convert IPython notebooks. |
|
574 | 610 | |
|
575 | 611 | This function can export the current IPython history to a notebook file |
|
576 | 612 | or can convert an existing notebook file into a different format. For |
|
577 | 613 | example, to export the history to "foo.ipynb" do "%notebook -e foo.ipynb". |
|
578 | 614 | To export the history to "foo.py" do "%notebook -e foo.py". To convert |
|
579 | 615 | "foo.ipynb" to "foo.json" do "%notebook -f json foo.ipynb". Possible |
|
580 | 616 | formats include (json/ipynb, py). |
|
581 | 617 | """ |
|
582 | 618 | args = magic_arguments.parse_argstring(self.notebook, s) |
|
583 | 619 | |
|
584 | 620 | from IPython.nbformat import current |
|
585 | 621 | args.filename = unquote_filename(args.filename) |
|
586 | 622 | if args.export: |
|
587 | 623 | fname, name, format = current.parse_filename(args.filename) |
|
588 | 624 | cells = [] |
|
589 | 625 | hist = list(self.shell.history_manager.get_range()) |
|
590 | 626 | for session, prompt_number, input in hist[:-1]: |
|
591 | 627 | cells.append(current.new_code_cell(prompt_number=prompt_number, |
|
592 | 628 | input=input)) |
|
593 | 629 | worksheet = current.new_worksheet(cells=cells) |
|
594 | 630 | nb = current.new_notebook(name=name,worksheets=[worksheet]) |
|
595 | 631 | with io.open(fname, 'w', encoding='utf-8') as f: |
|
596 | 632 | current.write(nb, f, format); |
|
597 | 633 | elif args.format is not None: |
|
598 | 634 | old_fname, old_name, old_format = current.parse_filename(args.filename) |
|
599 | 635 | new_format = args.format |
|
600 | 636 | if new_format == u'xml': |
|
601 | 637 | raise ValueError('Notebooks cannot be written as xml.') |
|
602 | 638 | elif new_format == u'ipynb' or new_format == u'json': |
|
603 | 639 | new_fname = old_name + u'.ipynb' |
|
604 | 640 | new_format = u'json' |
|
605 | 641 | elif new_format == u'py': |
|
606 | 642 | new_fname = old_name + u'.py' |
|
607 | 643 | else: |
|
608 | 644 | raise ValueError('Invalid notebook format: %s' % new_format) |
|
609 | 645 | with io.open(old_fname, 'r', encoding='utf-8') as f: |
|
610 | 646 | nb = current.read(f, old_format) |
|
611 | 647 | with io.open(new_fname, 'w', encoding='utf-8') as f: |
|
612 | 648 | current.write(nb, f, new_format) |
@@ -1,580 +1,649 b'' | |||
|
1 | 1 | # -*- coding: utf-8 -*- |
|
2 | 2 | """Tests for the key interactiveshell module. |
|
3 | 3 | |
|
4 | 4 | Historically the main classes in interactiveshell have been under-tested. This |
|
5 | 5 | module should grow as many single-method tests as possible to trap many of the |
|
6 | 6 | recurring bugs we seem to encounter with high-level interaction. |
|
7 | 7 | |
|
8 | 8 | Authors |
|
9 | 9 | ------- |
|
10 | 10 | * Fernando Perez |
|
11 | 11 | """ |
|
12 | 12 | #----------------------------------------------------------------------------- |
|
13 | 13 | # Copyright (C) 2011 The IPython Development Team |
|
14 | 14 | # |
|
15 | 15 | # Distributed under the terms of the BSD License. The full license is in |
|
16 | 16 | # the file COPYING, distributed as part of this software. |
|
17 | 17 | #----------------------------------------------------------------------------- |
|
18 | 18 | |
|
19 | 19 | #----------------------------------------------------------------------------- |
|
20 | 20 | # Imports |
|
21 | 21 | #----------------------------------------------------------------------------- |
|
22 | 22 | # stdlib |
|
23 | 23 | import ast |
|
24 | 24 | import os |
|
25 | 25 | import shutil |
|
26 | 26 | import sys |
|
27 | 27 | import tempfile |
|
28 | 28 | import unittest |
|
29 | 29 | from os.path import join |
|
30 | 30 | from StringIO import StringIO |
|
31 | 31 | |
|
32 | 32 | # third-party |
|
33 | 33 | import nose.tools as nt |
|
34 | 34 | |
|
35 | 35 | # Our own |
|
36 | 36 | from IPython.testing.decorators import skipif |
|
37 | 37 | from IPython.testing import tools as tt |
|
38 | 38 | from IPython.utils import io |
|
39 | 39 | |
|
40 | 40 | #----------------------------------------------------------------------------- |
|
41 | 41 | # Globals |
|
42 | 42 | #----------------------------------------------------------------------------- |
|
43 | 43 | # This is used by every single test, no point repeating it ad nauseam |
|
44 | 44 | ip = get_ipython() |
|
45 | 45 | |
|
46 | 46 | #----------------------------------------------------------------------------- |
|
47 | 47 | # Tests |
|
48 | 48 | #----------------------------------------------------------------------------- |
|
49 | 49 | |
|
50 | 50 | class InteractiveShellTestCase(unittest.TestCase): |
|
51 | 51 | def test_naked_string_cells(self): |
|
52 | 52 | """Test that cells with only naked strings are fully executed""" |
|
53 | 53 | # First, single-line inputs |
|
54 | 54 | ip.run_cell('"a"\n') |
|
55 | 55 | self.assertEqual(ip.user_ns['_'], 'a') |
|
56 | 56 | # And also multi-line cells |
|
57 | 57 | ip.run_cell('"""a\nb"""\n') |
|
58 | 58 | self.assertEqual(ip.user_ns['_'], 'a\nb') |
|
59 | 59 | |
|
60 | 60 | def test_run_empty_cell(self): |
|
61 | 61 | """Just make sure we don't get a horrible error with a blank |
|
62 | 62 | cell of input. Yes, I did overlook that.""" |
|
63 | 63 | old_xc = ip.execution_count |
|
64 | 64 | ip.run_cell('') |
|
65 | 65 | self.assertEqual(ip.execution_count, old_xc) |
|
66 | 66 | |
|
67 | 67 | def test_run_cell_multiline(self): |
|
68 | 68 | """Multi-block, multi-line cells must execute correctly. |
|
69 | 69 | """ |
|
70 | 70 | src = '\n'.join(["x=1", |
|
71 | 71 | "y=2", |
|
72 | 72 | "if 1:", |
|
73 | 73 | " x += 1", |
|
74 | 74 | " y += 1",]) |
|
75 | 75 | ip.run_cell(src) |
|
76 | 76 | self.assertEqual(ip.user_ns['x'], 2) |
|
77 | 77 | self.assertEqual(ip.user_ns['y'], 3) |
|
78 | 78 | |
|
79 | 79 | def test_multiline_string_cells(self): |
|
80 | 80 | "Code sprinkled with multiline strings should execute (GH-306)" |
|
81 | 81 | ip.run_cell('tmp=0') |
|
82 | 82 | self.assertEqual(ip.user_ns['tmp'], 0) |
|
83 | 83 | ip.run_cell('tmp=1;"""a\nb"""\n') |
|
84 | 84 | self.assertEqual(ip.user_ns['tmp'], 1) |
|
85 | 85 | |
|
86 | 86 | def test_dont_cache_with_semicolon(self): |
|
87 | 87 | "Ending a line with semicolon should not cache the returned object (GH-307)" |
|
88 | 88 | oldlen = len(ip.user_ns['Out']) |
|
89 | 89 | a = ip.run_cell('1;', store_history=True) |
|
90 | 90 | newlen = len(ip.user_ns['Out']) |
|
91 | 91 | self.assertEqual(oldlen, newlen) |
|
92 | 92 | #also test the default caching behavior |
|
93 | 93 | ip.run_cell('1', store_history=True) |
|
94 | 94 | newlen = len(ip.user_ns['Out']) |
|
95 | 95 | self.assertEqual(oldlen+1, newlen) |
|
96 | 96 | |
|
97 | 97 | def test_In_variable(self): |
|
98 | 98 | "Verify that In variable grows with user input (GH-284)" |
|
99 | 99 | oldlen = len(ip.user_ns['In']) |
|
100 | 100 | ip.run_cell('1;', store_history=True) |
|
101 | 101 | newlen = len(ip.user_ns['In']) |
|
102 | 102 | self.assertEqual(oldlen+1, newlen) |
|
103 | 103 | self.assertEqual(ip.user_ns['In'][-1],'1;') |
|
104 | 104 | |
|
105 | 105 | def test_magic_names_in_string(self): |
|
106 | 106 | ip.run_cell('a = """\n%exit\n"""') |
|
107 | 107 | self.assertEqual(ip.user_ns['a'], '\n%exit\n') |
|
108 | 108 | |
|
109 | 109 | def test_alias_crash(self): |
|
110 | 110 | """Errors in prefilter can't crash IPython""" |
|
111 | 111 | ip.run_cell('%alias parts echo first %s second %s') |
|
112 | 112 | # capture stderr: |
|
113 | 113 | save_err = io.stderr |
|
114 | 114 | io.stderr = StringIO() |
|
115 | 115 | ip.run_cell('parts 1') |
|
116 | 116 | err = io.stderr.getvalue() |
|
117 | 117 | io.stderr = save_err |
|
118 | 118 | self.assertEqual(err.split(':')[0], 'ERROR') |
|
119 | 119 | |
|
120 | 120 | def test_trailing_newline(self): |
|
121 | 121 | """test that running !(command) does not raise a SyntaxError""" |
|
122 | 122 | ip.run_cell('!(true)\n', False) |
|
123 | 123 | ip.run_cell('!(true)\n\n\n', False) |
|
124 | 124 | |
|
125 | 125 | def test_gh_597(self): |
|
126 | 126 | """Pretty-printing lists of objects with non-ascii reprs may cause |
|
127 | 127 | problems.""" |
|
128 | 128 | class Spam(object): |
|
129 | 129 | def __repr__(self): |
|
130 | 130 | return "\xe9"*50 |
|
131 | 131 | import IPython.core.formatters |
|
132 | 132 | f = IPython.core.formatters.PlainTextFormatter() |
|
133 | 133 | f([Spam(),Spam()]) |
|
134 | 134 | |
|
135 | 135 | |
|
136 | 136 | def test_future_flags(self): |
|
137 | 137 | """Check that future flags are used for parsing code (gh-777)""" |
|
138 | 138 | ip.run_cell('from __future__ import print_function') |
|
139 | 139 | try: |
|
140 | 140 | ip.run_cell('prfunc_return_val = print(1,2, sep=" ")') |
|
141 | 141 | assert 'prfunc_return_val' in ip.user_ns |
|
142 | 142 | finally: |
|
143 | 143 | # Reset compiler flags so we don't mess up other tests. |
|
144 | 144 | ip.compile.reset_compiler_flags() |
|
145 | 145 | |
|
146 | 146 | def test_future_unicode(self): |
|
147 | 147 | """Check that unicode_literals is imported from __future__ (gh #786)""" |
|
148 | 148 | try: |
|
149 | 149 | ip.run_cell(u'byte_str = "a"') |
|
150 | 150 | assert isinstance(ip.user_ns['byte_str'], str) # string literals are byte strings by default |
|
151 | 151 | ip.run_cell('from __future__ import unicode_literals') |
|
152 | 152 | ip.run_cell(u'unicode_str = "a"') |
|
153 | 153 | assert isinstance(ip.user_ns['unicode_str'], unicode) # strings literals are now unicode |
|
154 | 154 | finally: |
|
155 | 155 | # Reset compiler flags so we don't mess up other tests. |
|
156 | 156 | ip.compile.reset_compiler_flags() |
|
157 | 157 | |
|
158 | 158 | def test_can_pickle(self): |
|
159 | 159 | "Can we pickle objects defined interactively (GH-29)" |
|
160 | 160 | ip = get_ipython() |
|
161 | 161 | ip.reset() |
|
162 | 162 | ip.run_cell(("class Mylist(list):\n" |
|
163 | 163 | " def __init__(self,x=[]):\n" |
|
164 | 164 | " list.__init__(self,x)")) |
|
165 | 165 | ip.run_cell("w=Mylist([1,2,3])") |
|
166 | 166 | |
|
167 | 167 | from cPickle import dumps |
|
168 | 168 | |
|
169 | 169 | # We need to swap in our main module - this is only necessary |
|
170 | 170 | # inside the test framework, because IPython puts the interactive module |
|
171 | 171 | # in place (but the test framework undoes this). |
|
172 | 172 | _main = sys.modules['__main__'] |
|
173 | 173 | sys.modules['__main__'] = ip.user_module |
|
174 | 174 | try: |
|
175 | 175 | res = dumps(ip.user_ns["w"]) |
|
176 | 176 | finally: |
|
177 | 177 | sys.modules['__main__'] = _main |
|
178 | 178 | self.assertTrue(isinstance(res, bytes)) |
|
179 | 179 | |
|
180 | 180 | def test_global_ns(self): |
|
181 | 181 | "Code in functions must be able to access variables outside them." |
|
182 | 182 | ip = get_ipython() |
|
183 | 183 | ip.run_cell("a = 10") |
|
184 | 184 | ip.run_cell(("def f(x):\n" |
|
185 | 185 | " return x + a")) |
|
186 | 186 | ip.run_cell("b = f(12)") |
|
187 | 187 | self.assertEqual(ip.user_ns["b"], 22) |
|
188 | 188 | |
|
189 | 189 | def test_bad_custom_tb(self): |
|
190 | 190 | """Check that InteractiveShell is protected from bad custom exception handlers""" |
|
191 | 191 | from IPython.utils import io |
|
192 | 192 | save_stderr = io.stderr |
|
193 | 193 | try: |
|
194 | 194 | # capture stderr |
|
195 | 195 | io.stderr = StringIO() |
|
196 | 196 | ip.set_custom_exc((IOError,), lambda etype,value,tb: 1/0) |
|
197 | 197 | self.assertEqual(ip.custom_exceptions, (IOError,)) |
|
198 | 198 | ip.run_cell(u'raise IOError("foo")') |
|
199 | 199 | self.assertEqual(ip.custom_exceptions, ()) |
|
200 | 200 | self.assertTrue("Custom TB Handler failed" in io.stderr.getvalue()) |
|
201 | 201 | finally: |
|
202 | 202 | io.stderr = save_stderr |
|
203 | 203 | |
|
204 | 204 | def test_bad_custom_tb_return(self): |
|
205 | 205 | """Check that InteractiveShell is protected from bad return types in custom exception handlers""" |
|
206 | 206 | from IPython.utils import io |
|
207 | 207 | save_stderr = io.stderr |
|
208 | 208 | try: |
|
209 | 209 | # capture stderr |
|
210 | 210 | io.stderr = StringIO() |
|
211 | 211 | ip.set_custom_exc((NameError,),lambda etype,value,tb, tb_offset=None: 1) |
|
212 | 212 | self.assertEqual(ip.custom_exceptions, (NameError,)) |
|
213 | 213 | ip.run_cell(u'a=abracadabra') |
|
214 | 214 | self.assertEqual(ip.custom_exceptions, ()) |
|
215 | 215 | self.assertTrue("Custom TB Handler failed" in io.stderr.getvalue()) |
|
216 | 216 | finally: |
|
217 | 217 | io.stderr = save_stderr |
|
218 | 218 | |
|
219 | 219 | def test_drop_by_id(self): |
|
220 | 220 | myvars = {"a":object(), "b":object(), "c": object()} |
|
221 | 221 | ip.push(myvars, interactive=False) |
|
222 | 222 | for name in myvars: |
|
223 | 223 | assert name in ip.user_ns, name |
|
224 | 224 | assert name in ip.user_ns_hidden, name |
|
225 | 225 | ip.user_ns['b'] = 12 |
|
226 | 226 | ip.drop_by_id(myvars) |
|
227 | 227 | for name in ["a", "c"]: |
|
228 | 228 | assert name not in ip.user_ns, name |
|
229 | 229 | assert name not in ip.user_ns_hidden, name |
|
230 | 230 | assert ip.user_ns['b'] == 12 |
|
231 | 231 | ip.reset() |
|
232 | 232 | |
|
233 | 233 | def test_var_expand(self): |
|
234 | 234 | ip.user_ns['f'] = u'Ca\xf1o' |
|
235 | 235 | self.assertEqual(ip.var_expand(u'echo $f'), u'echo Ca\xf1o') |
|
236 | 236 | self.assertEqual(ip.var_expand(u'echo {f}'), u'echo Ca\xf1o') |
|
237 | 237 | self.assertEqual(ip.var_expand(u'echo {f[:-1]}'), u'echo Ca\xf1') |
|
238 | 238 | self.assertEqual(ip.var_expand(u'echo {1*2}'), u'echo 2') |
|
239 | 239 | |
|
240 | 240 | ip.user_ns['f'] = b'Ca\xc3\xb1o' |
|
241 | 241 | # This should not raise any exception: |
|
242 | 242 | ip.var_expand(u'echo $f') |
|
243 | 243 | |
|
244 | 244 | def test_var_expand_local(self): |
|
245 | 245 | """Test local variable expansion in !system and %magic calls""" |
|
246 | 246 | # !system |
|
247 | 247 | ip.run_cell('def test():\n' |
|
248 | 248 | ' lvar = "ttt"\n' |
|
249 | 249 | ' ret = !echo {lvar}\n' |
|
250 | 250 | ' return ret[0]\n') |
|
251 | 251 | res = ip.user_ns['test']() |
|
252 | 252 | nt.assert_in('ttt', res) |
|
253 | 253 | |
|
254 | 254 | # %magic |
|
255 | 255 | ip.run_cell('def makemacro():\n' |
|
256 | 256 | ' macroname = "macro_var_expand_locals"\n' |
|
257 | 257 | ' %macro {macroname} codestr\n') |
|
258 | 258 | ip.user_ns['codestr'] = "str(12)" |
|
259 | 259 | ip.run_cell('makemacro()') |
|
260 | 260 | nt.assert_in('macro_var_expand_locals', ip.user_ns) |
|
261 | 261 | |
|
262 | 262 | def test_var_expand_self(self): |
|
263 | 263 | """Test variable expansion with the name 'self', which was failing. |
|
264 | 264 | |
|
265 | 265 | See https://github.com/ipython/ipython/issues/1878#issuecomment-7698218 |
|
266 | 266 | """ |
|
267 | 267 | ip.run_cell('class cTest:\n' |
|
268 | 268 | ' classvar="see me"\n' |
|
269 | 269 | ' def test(self):\n' |
|
270 | 270 | ' res = !echo Variable: {self.classvar}\n' |
|
271 | 271 | ' return res[0]\n') |
|
272 | 272 | nt.assert_in('see me', ip.user_ns['cTest']().test()) |
|
273 | 273 | |
|
274 | 274 | def test_bad_var_expand(self): |
|
275 | 275 | """var_expand on invalid formats shouldn't raise""" |
|
276 | 276 | # SyntaxError |
|
277 | 277 | self.assertEqual(ip.var_expand(u"{'a':5}"), u"{'a':5}") |
|
278 | 278 | # NameError |
|
279 | 279 | self.assertEqual(ip.var_expand(u"{asdf}"), u"{asdf}") |
|
280 | 280 | # ZeroDivisionError |
|
281 | 281 | self.assertEqual(ip.var_expand(u"{1/0}"), u"{1/0}") |
|
282 | 282 | |
|
283 | 283 | def test_silent_nopostexec(self): |
|
284 | 284 | """run_cell(silent=True) doesn't invoke post-exec funcs""" |
|
285 | 285 | d = dict(called=False) |
|
286 | 286 | def set_called(): |
|
287 | 287 | d['called'] = True |
|
288 | 288 | |
|
289 | 289 | ip.register_post_execute(set_called) |
|
290 | 290 | ip.run_cell("1", silent=True) |
|
291 | 291 | self.assertFalse(d['called']) |
|
292 | 292 | # double-check that non-silent exec did what we expected |
|
293 | 293 | # silent to avoid |
|
294 | 294 | ip.run_cell("1") |
|
295 | 295 | self.assertTrue(d['called']) |
|
296 | 296 | # remove post-exec |
|
297 | 297 | ip._post_execute.pop(set_called) |
|
298 | 298 | |
|
299 | 299 | def test_silent_noadvance(self): |
|
300 | 300 | """run_cell(silent=True) doesn't advance execution_count""" |
|
301 | 301 | ec = ip.execution_count |
|
302 | 302 | # silent should force store_history=False |
|
303 | 303 | ip.run_cell("1", store_history=True, silent=True) |
|
304 | 304 | |
|
305 | 305 | self.assertEqual(ec, ip.execution_count) |
|
306 | 306 | # double-check that non-silent exec did what we expected |
|
307 | 307 | # silent to avoid |
|
308 | 308 | ip.run_cell("1", store_history=True) |
|
309 | 309 | self.assertEqual(ec+1, ip.execution_count) |
|
310 | 310 | |
|
311 | 311 | def test_silent_nodisplayhook(self): |
|
312 | 312 | """run_cell(silent=True) doesn't trigger displayhook""" |
|
313 | 313 | d = dict(called=False) |
|
314 | 314 | |
|
315 | 315 | trap = ip.display_trap |
|
316 | 316 | save_hook = trap.hook |
|
317 | 317 | |
|
318 | 318 | def failing_hook(*args, **kwargs): |
|
319 | 319 | d['called'] = True |
|
320 | 320 | |
|
321 | 321 | try: |
|
322 | 322 | trap.hook = failing_hook |
|
323 | 323 | ip.run_cell("1", silent=True) |
|
324 | 324 | self.assertFalse(d['called']) |
|
325 | 325 | # double-check that non-silent exec did what we expected |
|
326 | 326 | # silent to avoid |
|
327 | 327 | ip.run_cell("1") |
|
328 | 328 | self.assertTrue(d['called']) |
|
329 | 329 | finally: |
|
330 | 330 | trap.hook = save_hook |
|
331 | 331 | |
|
332 | 332 | @skipif(sys.version_info[0] >= 3, "softspace removed in py3") |
|
333 | 333 | def test_print_softspace(self): |
|
334 | 334 | """Verify that softspace is handled correctly when executing multiple |
|
335 | 335 | statements. |
|
336 | 336 | |
|
337 | 337 | In [1]: print 1; print 2 |
|
338 | 338 | 1 |
|
339 | 339 | 2 |
|
340 | 340 | |
|
341 | 341 | In [2]: print 1,; print 2 |
|
342 | 342 | 1 2 |
|
343 | 343 | """ |
|
344 | 344 | |
|
345 | 345 | def test_ofind_line_magic(self): |
|
346 | 346 | from IPython.core.magic import register_line_magic |
|
347 | 347 | |
|
348 | 348 | @register_line_magic |
|
349 | 349 | def lmagic(line): |
|
350 | 350 | "A line magic" |
|
351 | 351 | |
|
352 | 352 | # Get info on line magic |
|
353 | 353 | lfind = ip._ofind('lmagic') |
|
354 | 354 | info = dict(found=True, isalias=False, ismagic=True, |
|
355 | 355 | namespace = 'IPython internal', obj= lmagic.__wrapped__, |
|
356 | 356 | parent = None) |
|
357 | 357 | nt.assert_equal(lfind, info) |
|
358 | 358 | |
|
359 | 359 | def test_ofind_cell_magic(self): |
|
360 | 360 | from IPython.core.magic import register_cell_magic |
|
361 | 361 | |
|
362 | 362 | @register_cell_magic |
|
363 | 363 | def cmagic(line, cell): |
|
364 | 364 | "A cell magic" |
|
365 | 365 | |
|
366 | 366 | # Get info on cell magic |
|
367 | 367 | find = ip._ofind('cmagic') |
|
368 | 368 | info = dict(found=True, isalias=False, ismagic=True, |
|
369 | 369 | namespace = 'IPython internal', obj= cmagic.__wrapped__, |
|
370 | 370 | parent = None) |
|
371 | 371 | nt.assert_equal(find, info) |
|
372 | 372 | |
|
373 | 373 | def test_custom_exception(self): |
|
374 | 374 | called = [] |
|
375 | 375 | def my_handler(shell, etype, value, tb, tb_offset=None): |
|
376 | 376 | called.append(etype) |
|
377 | 377 | shell.showtraceback((etype, value, tb), tb_offset=tb_offset) |
|
378 | 378 | |
|
379 | 379 | ip.set_custom_exc((ValueError,), my_handler) |
|
380 | 380 | try: |
|
381 | 381 | ip.run_cell("raise ValueError('test')") |
|
382 | 382 | # Check that this was called, and only once. |
|
383 | 383 | self.assertEqual(called, [ValueError]) |
|
384 | 384 | finally: |
|
385 | 385 | # Reset the custom exception hook |
|
386 | 386 | ip.set_custom_exc((), None) |
|
387 | 387 | |
|
388 | 388 | @skipif(sys.version_info[0] >= 3, "no differences with __future__ in py3") |
|
389 | 389 | def test_future_environment(self): |
|
390 | 390 | "Can we run code with & without the shell's __future__ imports?" |
|
391 | 391 | ip.run_cell("from __future__ import division") |
|
392 | 392 | ip.run_cell("a = 1/2", shell_futures=True) |
|
393 | 393 | self.assertEqual(ip.user_ns['a'], 0.5) |
|
394 | 394 | ip.run_cell("b = 1/2", shell_futures=False) |
|
395 | 395 | self.assertEqual(ip.user_ns['b'], 0) |
|
396 | 396 | |
|
397 | 397 | ip.compile.reset_compiler_flags() |
|
398 | 398 | # This shouldn't leak to the shell's compiler |
|
399 | 399 | ip.run_cell("from __future__ import division \nc=1/2", shell_futures=False) |
|
400 | 400 | self.assertEqual(ip.user_ns['c'], 0.5) |
|
401 | 401 | ip.run_cell("d = 1/2", shell_futures=True) |
|
402 | 402 | self.assertEqual(ip.user_ns['d'], 0) |
|
403 | 403 | |
|
404 | 404 | |
|
405 | 405 | class TestSafeExecfileNonAsciiPath(unittest.TestCase): |
|
406 | 406 | |
|
407 | 407 | def setUp(self): |
|
408 | 408 | self.BASETESTDIR = tempfile.mkdtemp() |
|
409 | 409 | self.TESTDIR = join(self.BASETESTDIR, u"Γ₯Àâ") |
|
410 | 410 | os.mkdir(self.TESTDIR) |
|
411 | 411 | with open(join(self.TESTDIR, u"Γ₯Àâtestscript.py"), "w") as sfile: |
|
412 | 412 | sfile.write("pass\n") |
|
413 | 413 | self.oldpath = os.getcwdu() |
|
414 | 414 | os.chdir(self.TESTDIR) |
|
415 | 415 | self.fname = u"Γ₯Àâtestscript.py" |
|
416 | 416 | |
|
417 | 417 | def tearDown(self): |
|
418 | 418 | os.chdir(self.oldpath) |
|
419 | 419 | shutil.rmtree(self.BASETESTDIR) |
|
420 | 420 | |
|
421 | 421 | def test_1(self): |
|
422 | 422 | """Test safe_execfile with non-ascii path |
|
423 | 423 | """ |
|
424 | 424 | ip.safe_execfile(self.fname, {}, raise_exceptions=True) |
|
425 | 425 | |
|
426 | 426 | |
|
427 | 427 | class TestSystemRaw(unittest.TestCase): |
|
428 | 428 | def test_1(self): |
|
429 | 429 | """Test system_raw with non-ascii cmd |
|
430 | 430 | """ |
|
431 | 431 | cmd = ur'''python -c "'Γ₯Àâ'" ''' |
|
432 | 432 | ip.system_raw(cmd) |
|
433 | 433 | |
|
434 | 434 | def test_exit_code(self): |
|
435 | 435 | """Test that the exit code is parsed correctly.""" |
|
436 | 436 | ip.system_raw('exit 1') |
|
437 | 437 | self.assertEqual(ip.user_ns['_exit_code'], 1) |
|
438 | 438 | |
|
439 | 439 | class TestModules(unittest.TestCase, tt.TempFileMixin): |
|
440 | 440 | def test_extraneous_loads(self): |
|
441 | 441 | """Test we're not loading modules on startup that we shouldn't. |
|
442 | 442 | """ |
|
443 | 443 | self.mktmp("import sys\n" |
|
444 | 444 | "print('numpy' in sys.modules)\n" |
|
445 | 445 | "print('IPython.parallel' in sys.modules)\n" |
|
446 | 446 | "print('IPython.kernel.zmq' in sys.modules)\n" |
|
447 | 447 | ) |
|
448 | 448 | out = "False\nFalse\nFalse\n" |
|
449 | 449 | tt.ipexec_validate(self.fname, out) |
|
450 | 450 | |
|
451 | 451 | class Negator(ast.NodeTransformer): |
|
452 | 452 | """Negates all number literals in an AST.""" |
|
453 | 453 | def visit_Num(self, node): |
|
454 | 454 | node.n = -node.n |
|
455 | 455 | return node |
|
456 | 456 | |
|
457 | 457 | class TestAstTransform(unittest.TestCase): |
|
458 | 458 | def setUp(self): |
|
459 | 459 | self.negator = Negator() |
|
460 | 460 | ip.ast_transformers.append(self.negator) |
|
461 | 461 | |
|
462 | 462 | def tearDown(self): |
|
463 | 463 | ip.ast_transformers.remove(self.negator) |
|
464 | 464 | |
|
465 | 465 | def test_run_cell(self): |
|
466 | 466 | with tt.AssertPrints('-34'): |
|
467 | 467 | ip.run_cell('print (12 + 22)') |
|
468 | 468 | |
|
469 | 469 | # A named reference to a number shouldn't be transformed. |
|
470 | 470 | ip.user_ns['n'] = 55 |
|
471 | 471 | with tt.AssertNotPrints('-55'): |
|
472 | 472 | ip.run_cell('print (n)') |
|
473 | 473 | |
|
474 | 474 | def test_timeit(self): |
|
475 | 475 | called = set() |
|
476 | 476 | def f(x): |
|
477 | 477 | called.add(x) |
|
478 | 478 | ip.push({'f':f}) |
|
479 | 479 | |
|
480 | 480 | with tt.AssertPrints("best of "): |
|
481 | 481 | ip.run_line_magic("timeit", "-n1 f(1)") |
|
482 | 482 | self.assertEqual(called, set([-1])) |
|
483 | 483 | called.clear() |
|
484 | 484 | |
|
485 | 485 | with tt.AssertPrints("best of "): |
|
486 | 486 | ip.run_cell_magic("timeit", "-n1 f(2)", "f(3)") |
|
487 | 487 | self.assertEqual(called, set([-2, -3])) |
|
488 | 488 | |
|
489 | 489 | def test_time(self): |
|
490 | 490 | called = [] |
|
491 | 491 | def f(x): |
|
492 | 492 | called.append(x) |
|
493 | 493 | ip.push({'f':f}) |
|
494 | 494 | |
|
495 | 495 | # Test with an expression |
|
496 | 496 | with tt.AssertPrints("Wall time: "): |
|
497 | 497 | ip.run_line_magic("time", "f(5+9)") |
|
498 | 498 | self.assertEqual(called, [-14]) |
|
499 | 499 | called[:] = [] |
|
500 | 500 | |
|
501 | 501 | # Test with a statement (different code path) |
|
502 | 502 | with tt.AssertPrints("Wall time: "): |
|
503 | 503 | ip.run_line_magic("time", "a = f(-3 + -2)") |
|
504 | 504 | self.assertEqual(called, [5]) |
|
505 | 505 | |
|
506 | 506 | def test_macro(self): |
|
507 | 507 | ip.push({'a':10}) |
|
508 | 508 | # The AST transformation makes this do a+=-1 |
|
509 | 509 | ip.define_macro("amacro", "a+=1\nprint(a)") |
|
510 | 510 | |
|
511 | 511 | with tt.AssertPrints("9"): |
|
512 | 512 | ip.run_cell("amacro") |
|
513 | 513 | with tt.AssertPrints("8"): |
|
514 | 514 | ip.run_cell("amacro") |
|
515 | 515 | |
|
516 | 516 | class IntegerWrapper(ast.NodeTransformer): |
|
517 | 517 | """Wraps all integers in a call to Integer()""" |
|
518 | 518 | def visit_Num(self, node): |
|
519 | 519 | if isinstance(node.n, int): |
|
520 | 520 | return ast.Call(func=ast.Name(id='Integer', ctx=ast.Load()), |
|
521 | 521 | args=[node], keywords=[]) |
|
522 | 522 | return node |
|
523 | 523 | |
|
524 | 524 | class TestAstTransform2(unittest.TestCase): |
|
525 | 525 | def setUp(self): |
|
526 | 526 | self.intwrapper = IntegerWrapper() |
|
527 | 527 | ip.ast_transformers.append(self.intwrapper) |
|
528 | 528 | |
|
529 | 529 | self.calls = [] |
|
530 | 530 | def Integer(*args): |
|
531 | 531 | self.calls.append(args) |
|
532 | 532 | return args |
|
533 | 533 | ip.push({"Integer": Integer}) |
|
534 | 534 | |
|
535 | 535 | def tearDown(self): |
|
536 | 536 | ip.ast_transformers.remove(self.intwrapper) |
|
537 | 537 | del ip.user_ns['Integer'] |
|
538 | 538 | |
|
539 | 539 | def test_run_cell(self): |
|
540 | 540 | ip.run_cell("n = 2") |
|
541 | 541 | self.assertEqual(self.calls, [(2,)]) |
|
542 | 542 | |
|
543 | 543 | # This shouldn't throw an error |
|
544 | 544 | ip.run_cell("o = 2.0") |
|
545 | 545 | self.assertEqual(ip.user_ns['o'], 2.0) |
|
546 | 546 | |
|
547 | 547 | def test_timeit(self): |
|
548 | 548 | called = set() |
|
549 | 549 | def f(x): |
|
550 | 550 | called.add(x) |
|
551 | 551 | ip.push({'f':f}) |
|
552 | 552 | |
|
553 | 553 | with tt.AssertPrints("best of "): |
|
554 | 554 | ip.run_line_magic("timeit", "-n1 f(1)") |
|
555 | 555 | self.assertEqual(called, set([(1,)])) |
|
556 | 556 | called.clear() |
|
557 | 557 | |
|
558 | 558 | with tt.AssertPrints("best of "): |
|
559 | 559 | ip.run_cell_magic("timeit", "-n1 f(2)", "f(3)") |
|
560 | 560 | self.assertEqual(called, set([(2,), (3,)])) |
|
561 | 561 | |
|
562 | 562 | class ErrorTransformer(ast.NodeTransformer): |
|
563 | 563 | """Throws an error when it sees a number.""" |
|
564 | 564 | def visit_Num(self): |
|
565 | 565 | raise ValueError("test") |
|
566 | 566 | |
|
567 | 567 | class TestAstTransformError(unittest.TestCase): |
|
568 | 568 | def test_unregistering(self): |
|
569 | 569 | err_transformer = ErrorTransformer() |
|
570 | 570 | ip.ast_transformers.append(err_transformer) |
|
571 | 571 | |
|
572 | 572 | with tt.AssertPrints("unregister", channel='stderr'): |
|
573 | 573 | ip.run_cell("1 + 2") |
|
574 | 574 | |
|
575 | 575 | # This should have been removed. |
|
576 | 576 | nt.assert_not_in(err_transformer, ip.ast_transformers) |
|
577 | 577 | |
|
578 | 578 | def test__IPYTHON__(): |
|
579 | 579 | # This shouldn't raise a NameError, that's all |
|
580 | 580 | __IPYTHON__ |
|
581 | ||
|
582 | ||
|
583 | class DummyRepr(object): | |
|
584 | def __repr__(self): | |
|
585 | return "DummyRepr" | |
|
586 | ||
|
587 | def _repr_html_(self): | |
|
588 | return "<b>dummy</b>" | |
|
589 | ||
|
590 | def _repr_javascript_(self): | |
|
591 | return "console.log('hi');", {'key': 'value'} | |
|
592 | ||
|
593 | ||
|
594 | def test_user_variables(): | |
|
595 | # enable all formatters | |
|
596 | ip.display_formatter.active_types = ip.display_formatter.format_types | |
|
597 | ||
|
598 | ip.user_ns['dummy'] = d = DummyRepr() | |
|
599 | keys = set(['dummy', 'doesnotexist']) | |
|
600 | r = ip.user_variables(keys) | |
|
601 | ||
|
602 | nt.assert_equal(keys, set(r.keys())) | |
|
603 | dummy = r['dummy'] | |
|
604 | nt.assert_equal(set(['status', 'data', 'metadata']), set(dummy.keys())) | |
|
605 | nt.assert_equal(dummy['status'], 'ok') | |
|
606 | data = dummy['data'] | |
|
607 | metadata = dummy['metadata'] | |
|
608 | nt.assert_equal(data.get('text/html'), d._repr_html_()) | |
|
609 | js, jsmd = d._repr_javascript_() | |
|
610 | nt.assert_equal(data.get('application/javascript'), js) | |
|
611 | nt.assert_equal(metadata.get('application/javascript'), jsmd) | |
|
612 | ||
|
613 | dne = r['doesnotexist'] | |
|
614 | nt.assert_equal(dne['status'], 'error') | |
|
615 | nt.assert_equal(dne['ename'], 'KeyError') | |
|
616 | ||
|
617 | # back to text only | |
|
618 | ip.display_formatter.active_types = ['text/plain'] | |
|
619 | ||
|
620 | def test_user_expression(): | |
|
621 | # enable all formatters | |
|
622 | ip.display_formatter.active_types = ip.display_formatter.format_types | |
|
623 | query = { | |
|
624 | 'a' : '1 + 2', | |
|
625 | 'b' : '1/0', | |
|
626 | } | |
|
627 | r = ip.user_expressions(query) | |
|
628 | import pprint | |
|
629 | pprint.pprint(r) | |
|
630 | nt.assert_equal(r.keys(), query.keys()) | |
|
631 | a = r['a'] | |
|
632 | nt.assert_equal(set(['status', 'data', 'metadata']), set(a.keys())) | |
|
633 | nt.assert_equal(a['status'], 'ok') | |
|
634 | data = a['data'] | |
|
635 | metadata = a['metadata'] | |
|
636 | nt.assert_equal(data.get('text/plain'), '3') | |
|
637 | ||
|
638 | b = r['b'] | |
|
639 | nt.assert_equal(b['status'], 'error') | |
|
640 | nt.assert_equal(b['ename'], 'ZeroDivisionError') | |
|
641 | ||
|
642 | # back to text only | |
|
643 | ip.display_formatter.active_types = ['text/plain'] | |
|
644 | ||
|
645 | ||
|
646 | ||
|
647 | ||
|
648 | ||
|
649 |
@@ -1,302 +1,304 b'' | |||
|
1 | 1 | # System library imports |
|
2 | 2 | from IPython.external.qt import QtGui |
|
3 | 3 | |
|
4 | 4 | # Local imports |
|
5 | 5 | from IPython.utils.traitlets import Bool |
|
6 | 6 | from console_widget import ConsoleWidget |
|
7 | 7 | |
|
8 | 8 | |
|
9 | 9 | class HistoryConsoleWidget(ConsoleWidget): |
|
10 | 10 | """ A ConsoleWidget that keeps a history of the commands that have been |
|
11 | 11 | executed and provides a readline-esque interface to this history. |
|
12 | 12 | """ |
|
13 | 13 | |
|
14 | 14 | #------ Configuration ------------------------------------------------------ |
|
15 | 15 | |
|
16 | 16 | # If enabled, the input buffer will become "locked" to history movement when |
|
17 | 17 | # an edit is made to a multi-line input buffer. To override the lock, use |
|
18 | 18 | # Shift in conjunction with the standard history cycling keys. |
|
19 | 19 | history_lock = Bool(False, config=True) |
|
20 | 20 | |
|
21 | 21 | #--------------------------------------------------------------------------- |
|
22 | 22 | # 'object' interface |
|
23 | 23 | #--------------------------------------------------------------------------- |
|
24 | 24 | |
|
25 | 25 | def __init__(self, *args, **kw): |
|
26 | 26 | super(HistoryConsoleWidget, self).__init__(*args, **kw) |
|
27 | 27 | |
|
28 | 28 | # HistoryConsoleWidget protected variables. |
|
29 | 29 | self._history = [] |
|
30 | 30 | self._history_edits = {} |
|
31 | 31 | self._history_index = 0 |
|
32 | 32 | self._history_prefix = '' |
|
33 | 33 | |
|
34 | 34 | #--------------------------------------------------------------------------- |
|
35 | 35 | # 'ConsoleWidget' public interface |
|
36 | 36 | #--------------------------------------------------------------------------- |
|
37 | 37 | |
|
38 | 38 | def execute(self, source=None, hidden=False, interactive=False): |
|
39 | 39 | """ Reimplemented to the store history. |
|
40 | 40 | """ |
|
41 | 41 | if not hidden: |
|
42 | 42 | history = self.input_buffer if source is None else source |
|
43 | 43 | |
|
44 | 44 | executed = super(HistoryConsoleWidget, self).execute( |
|
45 | 45 | source, hidden, interactive) |
|
46 | 46 | |
|
47 | 47 | if executed and not hidden: |
|
48 | 48 | # Save the command unless it was an empty string or was identical |
|
49 | 49 | # to the previous command. |
|
50 | 50 | history = history.rstrip() |
|
51 | 51 | if history and (not self._history or self._history[-1] != history): |
|
52 | 52 | self._history.append(history) |
|
53 | 53 | |
|
54 | 54 | # Emulate readline: reset all history edits. |
|
55 | 55 | self._history_edits = {} |
|
56 | 56 | |
|
57 | 57 | # Move the history index to the most recent item. |
|
58 | 58 | self._history_index = len(self._history) |
|
59 | 59 | |
|
60 | 60 | return executed |
|
61 | 61 | |
|
62 | 62 | #--------------------------------------------------------------------------- |
|
63 | 63 | # 'ConsoleWidget' abstract interface |
|
64 | 64 | #--------------------------------------------------------------------------- |
|
65 | 65 | |
|
66 | 66 | def _up_pressed(self, shift_modifier): |
|
67 | 67 | """ Called when the up key is pressed. Returns whether to continue |
|
68 | 68 | processing the event. |
|
69 | 69 | """ |
|
70 | 70 | prompt_cursor = self._get_prompt_cursor() |
|
71 | 71 | if self._get_cursor().blockNumber() == prompt_cursor.blockNumber(): |
|
72 | 72 | # Bail out if we're locked. |
|
73 | 73 | if self._history_locked() and not shift_modifier: |
|
74 | 74 | return False |
|
75 | 75 | |
|
76 | 76 | # Set a search prefix based on the cursor position. |
|
77 | 77 | col = self._get_input_buffer_cursor_column() |
|
78 | 78 | input_buffer = self.input_buffer |
|
79 | 79 | # use the *shortest* of the cursor column and the history prefix |
|
80 | 80 | # to determine if the prefix has changed |
|
81 | 81 | n = min(col, len(self._history_prefix)) |
|
82 | 82 | |
|
83 | 83 | # prefix changed, restart search from the beginning |
|
84 | 84 | if (self._history_prefix[:n] != input_buffer[:n]): |
|
85 | 85 | self._history_index = len(self._history) |
|
86 | 86 | |
|
87 | 87 | # the only time we shouldn't set the history prefix |
|
88 | 88 | # to the line up to the cursor is if we are already |
|
89 | 89 | # in a simple scroll (no prefix), |
|
90 | 90 | # and the cursor is at the end of the first line |
|
91 | 91 | |
|
92 | 92 | # check if we are at the end of the first line |
|
93 | 93 | c = self._get_cursor() |
|
94 | 94 | current_pos = c.position() |
|
95 | 95 | c.movePosition(QtGui.QTextCursor.EndOfLine) |
|
96 | 96 | at_eol = (c.position() == current_pos) |
|
97 | 97 | |
|
98 | 98 | if self._history_index == len(self._history) or \ |
|
99 | 99 | not (self._history_prefix == '' and at_eol) or \ |
|
100 | 100 | not (self._get_edited_history(self._history_index)[:col] == input_buffer[:col]): |
|
101 | 101 | self._history_prefix = input_buffer[:col] |
|
102 | 102 | |
|
103 | 103 | # Perform the search. |
|
104 | 104 | self.history_previous(self._history_prefix, |
|
105 | 105 | as_prefix=not shift_modifier) |
|
106 | 106 | |
|
107 | 107 | # Go to the first line of the prompt for seemless history scrolling. |
|
108 | 108 | # Emulate readline: keep the cursor position fixed for a prefix |
|
109 | 109 | # search. |
|
110 | 110 | cursor = self._get_prompt_cursor() |
|
111 | 111 | if self._history_prefix: |
|
112 | 112 | cursor.movePosition(QtGui.QTextCursor.Right, |
|
113 | 113 | n=len(self._history_prefix)) |
|
114 | 114 | else: |
|
115 | 115 | cursor.movePosition(QtGui.QTextCursor.EndOfLine) |
|
116 | 116 | self._set_cursor(cursor) |
|
117 | 117 | |
|
118 | 118 | return False |
|
119 | 119 | |
|
120 | 120 | return True |
|
121 | 121 | |
|
122 | 122 | def _down_pressed(self, shift_modifier): |
|
123 | 123 | """ Called when the down key is pressed. Returns whether to continue |
|
124 | 124 | processing the event. |
|
125 | 125 | """ |
|
126 | 126 | end_cursor = self._get_end_cursor() |
|
127 | 127 | if self._get_cursor().blockNumber() == end_cursor.blockNumber(): |
|
128 | 128 | # Bail out if we're locked. |
|
129 | 129 | if self._history_locked() and not shift_modifier: |
|
130 | 130 | return False |
|
131 | 131 | |
|
132 | 132 | # Perform the search. |
|
133 | 133 | replaced = self.history_next(self._history_prefix, |
|
134 | 134 | as_prefix=not shift_modifier) |
|
135 | 135 | |
|
136 | 136 | # Emulate readline: keep the cursor position fixed for a prefix |
|
137 | 137 | # search. (We don't need to move the cursor to the end of the buffer |
|
138 | 138 | # in the other case because this happens automatically when the |
|
139 | 139 | # input buffer is set.) |
|
140 | 140 | if self._history_prefix and replaced: |
|
141 | 141 | cursor = self._get_prompt_cursor() |
|
142 | 142 | cursor.movePosition(QtGui.QTextCursor.Right, |
|
143 | 143 | n=len(self._history_prefix)) |
|
144 | 144 | self._set_cursor(cursor) |
|
145 | 145 | |
|
146 | 146 | return False |
|
147 | 147 | |
|
148 | 148 | return True |
|
149 | 149 | |
|
150 | 150 | #--------------------------------------------------------------------------- |
|
151 | 151 | # 'HistoryConsoleWidget' public interface |
|
152 | 152 | #--------------------------------------------------------------------------- |
|
153 | 153 | |
|
154 | 154 | def history_previous(self, substring='', as_prefix=True): |
|
155 | 155 | """ If possible, set the input buffer to a previous history item. |
|
156 | 156 | |
|
157 | 157 | Parameters: |
|
158 | 158 | ----------- |
|
159 | 159 | substring : str, optional |
|
160 | 160 | If specified, search for an item with this substring. |
|
161 | 161 | as_prefix : bool, optional |
|
162 | 162 | If True, the substring must match at the beginning (default). |
|
163 | 163 | |
|
164 | 164 | Returns: |
|
165 | 165 | -------- |
|
166 | 166 | Whether the input buffer was changed. |
|
167 | 167 | """ |
|
168 | 168 | index = self._history_index |
|
169 | 169 | replace = False |
|
170 | 170 | while index > 0: |
|
171 | 171 | index -= 1 |
|
172 | 172 | history = self._get_edited_history(index) |
|
173 | 173 | if (as_prefix and history.startswith(substring)) \ |
|
174 | 174 | or (not as_prefix and substring in history): |
|
175 | 175 | replace = True |
|
176 | 176 | break |
|
177 | 177 | |
|
178 | 178 | if replace: |
|
179 | 179 | self._store_edits() |
|
180 | 180 | self._history_index = index |
|
181 | 181 | self.input_buffer = history |
|
182 | 182 | |
|
183 | 183 | return replace |
|
184 | 184 | |
|
185 | 185 | def history_next(self, substring='', as_prefix=True): |
|
186 | 186 | """ If possible, set the input buffer to a subsequent history item. |
|
187 | 187 | |
|
188 | 188 | Parameters: |
|
189 | 189 | ----------- |
|
190 | 190 | substring : str, optional |
|
191 | 191 | If specified, search for an item with this substring. |
|
192 | 192 | as_prefix : bool, optional |
|
193 | 193 | If True, the substring must match at the beginning (default). |
|
194 | 194 | |
|
195 | 195 | Returns: |
|
196 | 196 | -------- |
|
197 | 197 | Whether the input buffer was changed. |
|
198 | 198 | """ |
|
199 | 199 | index = self._history_index |
|
200 | 200 | replace = False |
|
201 | 201 | while index < len(self._history): |
|
202 | 202 | index += 1 |
|
203 | 203 | history = self._get_edited_history(index) |
|
204 | 204 | if (as_prefix and history.startswith(substring)) \ |
|
205 | 205 | or (not as_prefix and substring in history): |
|
206 | 206 | replace = True |
|
207 | 207 | break |
|
208 | 208 | |
|
209 | 209 | if replace: |
|
210 | 210 | self._store_edits() |
|
211 | 211 | self._history_index = index |
|
212 | 212 | self.input_buffer = history |
|
213 | 213 | |
|
214 | 214 | return replace |
|
215 | 215 | |
|
216 | 216 | def history_tail(self, n=10): |
|
217 | 217 | """ Get the local history list. |
|
218 | 218 | |
|
219 | 219 | Parameters: |
|
220 | 220 | ----------- |
|
221 | 221 | n : int |
|
222 | 222 | The (maximum) number of history items to get. |
|
223 | 223 | """ |
|
224 | 224 | return self._history[-n:] |
|
225 | 225 | |
|
226 | 226 | def _request_update_session_history_length(self): |
|
227 | 227 | msg_id = self.kernel_client.shell_channel.execute('', |
|
228 | 228 | silent=True, |
|
229 | 229 | user_expressions={ |
|
230 | 230 | 'hlen':'len(get_ipython().history_manager.input_hist_raw)', |
|
231 | 231 | } |
|
232 | 232 | ) |
|
233 | 233 | self._request_info['execute'][msg_id] = self._ExecutionRequest(msg_id, 'save_magic') |
|
234 | 234 | |
|
235 | 235 | def _handle_execute_reply(self, msg): |
|
236 | 236 | """ Handles replies for code execution, here only session history length |
|
237 | 237 | """ |
|
238 | 238 | msg_id = msg['parent_header']['msg_id'] |
|
239 | 239 | info = self._request_info['execute'].pop(msg_id,None) |
|
240 | 240 | if info and info.kind == 'save_magic' and not self._hidden: |
|
241 | 241 | content = msg['content'] |
|
242 | 242 | status = content['status'] |
|
243 | 243 | if status == 'ok': |
|
244 |
self._max_session_history= |
|
|
244 | self._max_session_history = int( | |
|
245 | content['user_expressions']['hlen']['data']['text/plain'] | |
|
246 | ) | |
|
245 | 247 | |
|
246 | 248 | def save_magic(self): |
|
247 | 249 | # update the session history length |
|
248 | 250 | self._request_update_session_history_length() |
|
249 | 251 | |
|
250 | 252 | file_name,extFilter = QtGui.QFileDialog.getSaveFileName(self, |
|
251 | 253 | "Enter A filename", |
|
252 | 254 | filter='Python File (*.py);; All files (*.*)' |
|
253 | 255 | ) |
|
254 | 256 | |
|
255 | 257 | # let's the user search/type for a file name, while the history length |
|
256 | 258 | # is fetched |
|
257 | 259 | |
|
258 | 260 | if file_name: |
|
259 | 261 | hist_range, ok = QtGui.QInputDialog.getText(self, |
|
260 | 262 | 'Please enter an interval of command to save', |
|
261 | 263 | 'Saving commands:', |
|
262 | 264 | text=str('1-'+str(self._max_session_history)) |
|
263 | 265 | ) |
|
264 | 266 | if ok: |
|
265 | 267 | self.execute("%save"+" "+file_name+" "+str(hist_range)) |
|
266 | 268 | |
|
267 | 269 | #--------------------------------------------------------------------------- |
|
268 | 270 | # 'HistoryConsoleWidget' protected interface |
|
269 | 271 | #--------------------------------------------------------------------------- |
|
270 | 272 | |
|
271 | 273 | def _history_locked(self): |
|
272 | 274 | """ Returns whether history movement is locked. |
|
273 | 275 | """ |
|
274 | 276 | return (self.history_lock and |
|
275 | 277 | (self._get_edited_history(self._history_index) != |
|
276 | 278 | self.input_buffer) and |
|
277 | 279 | (self._get_prompt_cursor().blockNumber() != |
|
278 | 280 | self._get_end_cursor().blockNumber())) |
|
279 | 281 | |
|
280 | 282 | def _get_edited_history(self, index): |
|
281 | 283 | """ Retrieves a history item, possibly with temporary edits. |
|
282 | 284 | """ |
|
283 | 285 | if index in self._history_edits: |
|
284 | 286 | return self._history_edits[index] |
|
285 | 287 | elif index == len(self._history): |
|
286 | 288 | return unicode() |
|
287 | 289 | return self._history[index] |
|
288 | 290 | |
|
289 | 291 | def _set_history(self, history): |
|
290 | 292 | """ Replace the current history with a sequence of history items. |
|
291 | 293 | """ |
|
292 | 294 | self._history = list(history) |
|
293 | 295 | self._history_edits = {} |
|
294 | 296 | self._history_index = len(self._history) |
|
295 | 297 | |
|
296 | 298 | def _store_edits(self): |
|
297 | 299 | """ If there are edits to the current input buffer, store them. |
|
298 | 300 | """ |
|
299 | 301 | current = self.input_buffer |
|
300 | 302 | if self._history_index == len(self._history) or \ |
|
301 | 303 | self._history[self._history_index] != current: |
|
302 | 304 | self._history_edits[self._history_index] = current |
@@ -1,992 +1,993 b'' | |||
|
1 | 1 | """The Qt MainWindow for the QtConsole |
|
2 | 2 | |
|
3 | 3 | This is a tabbed pseudo-terminal of IPython sessions, with a menu bar for |
|
4 | 4 | common actions. |
|
5 | 5 | |
|
6 | 6 | Authors: |
|
7 | 7 | |
|
8 | 8 | * Evan Patterson |
|
9 | 9 | * Min RK |
|
10 | 10 | * Erik Tollerud |
|
11 | 11 | * Fernando Perez |
|
12 | 12 | * Bussonnier Matthias |
|
13 | 13 | * Thomas Kluyver |
|
14 | 14 | * Paul Ivanov |
|
15 | 15 | |
|
16 | 16 | """ |
|
17 | 17 | |
|
18 | 18 | #----------------------------------------------------------------------------- |
|
19 | 19 | # Imports |
|
20 | 20 | #----------------------------------------------------------------------------- |
|
21 | 21 | |
|
22 | 22 | # stdlib imports |
|
23 |
import |
|
|
23 | import json | |
|
24 | 24 | import re |
|
25 | import sys | |
|
25 | 26 | import webbrowser |
|
26 | import ast | |
|
27 | 27 | from threading import Thread |
|
28 | 28 | |
|
29 | 29 | # System library imports |
|
30 | 30 | from IPython.external.qt import QtGui,QtCore |
|
31 | 31 | |
|
32 | from IPython.core.magic import magic_escapes | |
|
33 | ||
|
32 | 34 | def background(f): |
|
33 | 35 | """call a function in a simple thread, to prevent blocking""" |
|
34 | 36 | t = Thread(target=f) |
|
35 | 37 | t.start() |
|
36 | 38 | return t |
|
37 | 39 | |
|
38 | 40 | #----------------------------------------------------------------------------- |
|
39 | 41 | # Classes |
|
40 | 42 | #----------------------------------------------------------------------------- |
|
41 | 43 | |
|
42 | 44 | class MainWindow(QtGui.QMainWindow): |
|
43 | 45 | |
|
44 | 46 | #--------------------------------------------------------------------------- |
|
45 | 47 | # 'object' interface |
|
46 | 48 | #--------------------------------------------------------------------------- |
|
47 | 49 | |
|
48 | 50 | _magic_menu_dict = {} |
|
49 | 51 | |
|
50 | 52 | def __init__(self, app, |
|
51 | 53 | confirm_exit=True, |
|
52 | 54 | new_frontend_factory=None, slave_frontend_factory=None, |
|
53 | 55 | ): |
|
54 | 56 | """ Create a tabbed MainWindow for managing IPython FrontendWidgets |
|
55 | 57 | |
|
56 | 58 | Parameters |
|
57 | 59 | ---------- |
|
58 | 60 | |
|
59 | 61 | app : reference to QApplication parent |
|
60 | 62 | confirm_exit : bool, optional |
|
61 | 63 | Whether we should prompt on close of tabs |
|
62 | 64 | new_frontend_factory : callable |
|
63 | 65 | A callable that returns a new IPythonWidget instance, attached to |
|
64 | 66 | its own running kernel. |
|
65 | 67 | slave_frontend_factory : callable |
|
66 | 68 | A callable that takes an existing IPythonWidget, and returns a new |
|
67 | 69 | IPythonWidget instance, attached to the same kernel. |
|
68 | 70 | """ |
|
69 | 71 | |
|
70 | 72 | super(MainWindow, self).__init__() |
|
71 | 73 | self._kernel_counter = 0 |
|
72 | 74 | self._app = app |
|
73 | 75 | self.confirm_exit = confirm_exit |
|
74 | 76 | self.new_frontend_factory = new_frontend_factory |
|
75 | 77 | self.slave_frontend_factory = slave_frontend_factory |
|
76 | 78 | |
|
77 | 79 | self.tab_widget = QtGui.QTabWidget(self) |
|
78 | 80 | self.tab_widget.setDocumentMode(True) |
|
79 | 81 | self.tab_widget.setTabsClosable(True) |
|
80 | 82 | self.tab_widget.tabCloseRequested[int].connect(self.close_tab) |
|
81 | 83 | |
|
82 | 84 | self.setCentralWidget(self.tab_widget) |
|
83 | 85 | # hide tab bar at first, since we have no tabs: |
|
84 | 86 | self.tab_widget.tabBar().setVisible(False) |
|
85 | 87 | # prevent focus in tab bar |
|
86 | 88 | self.tab_widget.setFocusPolicy(QtCore.Qt.NoFocus) |
|
87 | 89 | |
|
88 | 90 | def update_tab_bar_visibility(self): |
|
89 | 91 | """ update visibility of the tabBar depending of the number of tab |
|
90 | 92 | |
|
91 | 93 | 0 or 1 tab, tabBar hidden |
|
92 | 94 | 2+ tabs, tabBar visible |
|
93 | 95 | |
|
94 | 96 | send a self.close if number of tab ==0 |
|
95 | 97 | |
|
96 | 98 | need to be called explicitly, or be connected to tabInserted/tabRemoved |
|
97 | 99 | """ |
|
98 | 100 | if self.tab_widget.count() <= 1: |
|
99 | 101 | self.tab_widget.tabBar().setVisible(False) |
|
100 | 102 | else: |
|
101 | 103 | self.tab_widget.tabBar().setVisible(True) |
|
102 | 104 | if self.tab_widget.count()==0 : |
|
103 | 105 | self.close() |
|
104 | 106 | |
|
105 | 107 | @property |
|
106 | 108 | def next_kernel_id(self): |
|
107 | 109 | """constantly increasing counter for kernel IDs""" |
|
108 | 110 | c = self._kernel_counter |
|
109 | 111 | self._kernel_counter += 1 |
|
110 | 112 | return c |
|
111 | 113 | |
|
112 | 114 | @property |
|
113 | 115 | def active_frontend(self): |
|
114 | 116 | return self.tab_widget.currentWidget() |
|
115 | 117 | |
|
116 | 118 | def create_tab_with_new_frontend(self): |
|
117 | 119 | """create a new frontend and attach it to a new tab""" |
|
118 | 120 | widget = self.new_frontend_factory() |
|
119 | 121 | self.add_tab_with_frontend(widget) |
|
120 | 122 | |
|
121 | 123 | def create_tab_with_current_kernel(self): |
|
122 | 124 | """create a new frontend attached to the same kernel as the current tab""" |
|
123 | 125 | current_widget = self.tab_widget.currentWidget() |
|
124 | 126 | current_widget_index = self.tab_widget.indexOf(current_widget) |
|
125 | 127 | current_widget_name = self.tab_widget.tabText(current_widget_index) |
|
126 | 128 | widget = self.slave_frontend_factory(current_widget) |
|
127 | 129 | if 'slave' in current_widget_name: |
|
128 | 130 | # don't keep stacking slaves |
|
129 | 131 | name = current_widget_name |
|
130 | 132 | else: |
|
131 | 133 | name = '(%s) slave' % current_widget_name |
|
132 | 134 | self.add_tab_with_frontend(widget,name=name) |
|
133 | 135 | |
|
134 | 136 | def close_tab(self,current_tab): |
|
135 | 137 | """ Called when you need to try to close a tab. |
|
136 | 138 | |
|
137 | 139 | It takes the number of the tab to be closed as argument, or a reference |
|
138 | 140 | to the widget inside this tab |
|
139 | 141 | """ |
|
140 | 142 | |
|
141 | 143 | # let's be sure "tab" and "closing widget" are respectively the index |
|
142 | 144 | # of the tab to close and a reference to the frontend to close |
|
143 | 145 | if type(current_tab) is not int : |
|
144 | 146 | current_tab = self.tab_widget.indexOf(current_tab) |
|
145 | 147 | closing_widget=self.tab_widget.widget(current_tab) |
|
146 | 148 | |
|
147 | 149 | |
|
148 | 150 | # when trying to be closed, widget might re-send a request to be |
|
149 | 151 | # closed again, but will be deleted when event will be processed. So |
|
150 | 152 | # need to check that widget still exists and skip if not. One example |
|
151 | 153 | # of this is when 'exit' is sent in a slave tab. 'exit' will be |
|
152 | 154 | # re-sent by this function on the master widget, which ask all slave |
|
153 | 155 | # widgets to exit |
|
154 | 156 | if closing_widget==None: |
|
155 | 157 | return |
|
156 | 158 | |
|
157 | 159 | #get a list of all slave widgets on the same kernel. |
|
158 | 160 | slave_tabs = self.find_slave_widgets(closing_widget) |
|
159 | 161 | |
|
160 | 162 | keepkernel = None #Use the prompt by default |
|
161 | 163 | if hasattr(closing_widget,'_keep_kernel_on_exit'): #set by exit magic |
|
162 | 164 | keepkernel = closing_widget._keep_kernel_on_exit |
|
163 | 165 | # If signal sent by exit magic (_keep_kernel_on_exit, exist and not None) |
|
164 | 166 | # we set local slave tabs._hidden to True to avoid prompting for kernel |
|
165 | 167 | # restart when they get the signal. and then "forward" the 'exit' |
|
166 | 168 | # to the main window |
|
167 | 169 | if keepkernel is not None: |
|
168 | 170 | for tab in slave_tabs: |
|
169 | 171 | tab._hidden = True |
|
170 | 172 | if closing_widget in slave_tabs: |
|
171 | 173 | try : |
|
172 | 174 | self.find_master_tab(closing_widget).execute('exit') |
|
173 | 175 | except AttributeError: |
|
174 | 176 | self.log.info("Master already closed or not local, closing only current tab") |
|
175 | 177 | self.tab_widget.removeTab(current_tab) |
|
176 | 178 | self.update_tab_bar_visibility() |
|
177 | 179 | return |
|
178 | 180 | |
|
179 | 181 | kernel_client = closing_widget.kernel_client |
|
180 | 182 | kernel_manager = closing_widget.kernel_manager |
|
181 | 183 | |
|
182 | 184 | if keepkernel is None and not closing_widget._confirm_exit: |
|
183 | 185 | # don't prompt, just terminate the kernel if we own it |
|
184 | 186 | # or leave it alone if we don't |
|
185 | 187 | keepkernel = closing_widget._existing |
|
186 | 188 | if keepkernel is None: #show prompt |
|
187 | 189 | if kernel_client and kernel_client.channels_running: |
|
188 | 190 | title = self.window().windowTitle() |
|
189 | 191 | cancel = QtGui.QMessageBox.Cancel |
|
190 | 192 | okay = QtGui.QMessageBox.Ok |
|
191 | 193 | if closing_widget._may_close: |
|
192 | 194 | msg = "You are closing the tab : "+'"'+self.tab_widget.tabText(current_tab)+'"' |
|
193 | 195 | info = "Would you like to quit the Kernel and close all attached Consoles as well?" |
|
194 | 196 | justthis = QtGui.QPushButton("&No, just this Tab", self) |
|
195 | 197 | justthis.setShortcut('N') |
|
196 | 198 | closeall = QtGui.QPushButton("&Yes, close all", self) |
|
197 | 199 | closeall.setShortcut('Y') |
|
198 | 200 | # allow ctrl-d ctrl-d exit, like in terminal |
|
199 | 201 | closeall.setShortcut('Ctrl+D') |
|
200 | 202 | box = QtGui.QMessageBox(QtGui.QMessageBox.Question, |
|
201 | 203 | title, msg) |
|
202 | 204 | box.setInformativeText(info) |
|
203 | 205 | box.addButton(cancel) |
|
204 | 206 | box.addButton(justthis, QtGui.QMessageBox.NoRole) |
|
205 | 207 | box.addButton(closeall, QtGui.QMessageBox.YesRole) |
|
206 | 208 | box.setDefaultButton(closeall) |
|
207 | 209 | box.setEscapeButton(cancel) |
|
208 | 210 | pixmap = QtGui.QPixmap(self._app.icon.pixmap(QtCore.QSize(64,64))) |
|
209 | 211 | box.setIconPixmap(pixmap) |
|
210 | 212 | reply = box.exec_() |
|
211 | 213 | if reply == 1: # close All |
|
212 | 214 | for slave in slave_tabs: |
|
213 | 215 | background(slave.kernel_client.stop_channels) |
|
214 | 216 | self.tab_widget.removeTab(self.tab_widget.indexOf(slave)) |
|
215 | 217 | closing_widget.execute("exit") |
|
216 | 218 | self.tab_widget.removeTab(current_tab) |
|
217 | 219 | background(kernel_client.stop_channels) |
|
218 | 220 | elif reply == 0: # close Console |
|
219 | 221 | if not closing_widget._existing: |
|
220 | 222 | # Have kernel: don't quit, just close the tab |
|
221 | 223 | closing_widget.execute("exit True") |
|
222 | 224 | self.tab_widget.removeTab(current_tab) |
|
223 | 225 | background(kernel_client.stop_channels) |
|
224 | 226 | else: |
|
225 | 227 | reply = QtGui.QMessageBox.question(self, title, |
|
226 | 228 | "Are you sure you want to close this Console?"+ |
|
227 | 229 | "\nThe Kernel and other Consoles will remain active.", |
|
228 | 230 | okay|cancel, |
|
229 | 231 | defaultButton=okay |
|
230 | 232 | ) |
|
231 | 233 | if reply == okay: |
|
232 | 234 | self.tab_widget.removeTab(current_tab) |
|
233 | 235 | elif keepkernel: #close console but leave kernel running (no prompt) |
|
234 | 236 | self.tab_widget.removeTab(current_tab) |
|
235 | 237 | background(kernel_client.stop_channels) |
|
236 | 238 | else: #close console and kernel (no prompt) |
|
237 | 239 | self.tab_widget.removeTab(current_tab) |
|
238 | 240 | if kernel_client and kernel_client.channels_running: |
|
239 | 241 | for slave in slave_tabs: |
|
240 | 242 | background(slave.kernel_client.stop_channels) |
|
241 | 243 | self.tab_widget.removeTab(self.tab_widget.indexOf(slave)) |
|
242 | 244 | if kernel_manager: |
|
243 | 245 | kernel_manager.shutdown_kernel() |
|
244 | 246 | background(kernel_client.stop_channels) |
|
245 | 247 | |
|
246 | 248 | self.update_tab_bar_visibility() |
|
247 | 249 | |
|
248 | 250 | def add_tab_with_frontend(self,frontend,name=None): |
|
249 | 251 | """ insert a tab with a given frontend in the tab bar, and give it a name |
|
250 | 252 | |
|
251 | 253 | """ |
|
252 | 254 | if not name: |
|
253 | 255 | name = 'kernel %i' % self.next_kernel_id |
|
254 | 256 | self.tab_widget.addTab(frontend,name) |
|
255 | 257 | self.update_tab_bar_visibility() |
|
256 | 258 | self.make_frontend_visible(frontend) |
|
257 | 259 | frontend.exit_requested.connect(self.close_tab) |
|
258 | 260 | |
|
259 | 261 | def next_tab(self): |
|
260 | 262 | self.tab_widget.setCurrentIndex((self.tab_widget.currentIndex()+1)) |
|
261 | 263 | |
|
262 | 264 | def prev_tab(self): |
|
263 | 265 | self.tab_widget.setCurrentIndex((self.tab_widget.currentIndex()-1)) |
|
264 | 266 | |
|
265 | 267 | def make_frontend_visible(self,frontend): |
|
266 | 268 | widget_index=self.tab_widget.indexOf(frontend) |
|
267 | 269 | if widget_index > 0 : |
|
268 | 270 | self.tab_widget.setCurrentIndex(widget_index) |
|
269 | 271 | |
|
270 | 272 | def find_master_tab(self,tab,as_list=False): |
|
271 | 273 | """ |
|
272 | 274 | Try to return the frontend that owns the kernel attached to the given widget/tab. |
|
273 | 275 | |
|
274 | 276 | Only finds frontend owned by the current application. Selection |
|
275 | 277 | based on port of the kernel might be inaccurate if several kernel |
|
276 | 278 | on different ip use same port number. |
|
277 | 279 | |
|
278 | 280 | This function does the conversion tabNumber/widget if needed. |
|
279 | 281 | Might return None if no master widget (non local kernel) |
|
280 | 282 | Will crash IPython if more than 1 masterWidget |
|
281 | 283 | |
|
282 | 284 | When asList set to True, always return a list of widget(s) owning |
|
283 | 285 | the kernel. The list might be empty or containing several Widget. |
|
284 | 286 | """ |
|
285 | 287 | |
|
286 | 288 | #convert from/to int/richIpythonWidget if needed |
|
287 | 289 | if isinstance(tab, int): |
|
288 | 290 | tab = self.tab_widget.widget(tab) |
|
289 | 291 | km=tab.kernel_client |
|
290 | 292 | |
|
291 | 293 | #build list of all widgets |
|
292 | 294 | widget_list = [self.tab_widget.widget(i) for i in range(self.tab_widget.count())] |
|
293 | 295 | |
|
294 | 296 | # widget that are candidate to be the owner of the kernel does have all the same port of the curent widget |
|
295 | 297 | # And should have a _may_close attribute |
|
296 | 298 | filtered_widget_list = [ widget for widget in widget_list if |
|
297 | 299 | widget.kernel_client.connection_file == km.connection_file and |
|
298 | 300 | hasattr(widget,'_may_close') ] |
|
299 | 301 | # the master widget is the one that may close the kernel |
|
300 | 302 | master_widget= [ widget for widget in filtered_widget_list if widget._may_close] |
|
301 | 303 | if as_list: |
|
302 | 304 | return master_widget |
|
303 | 305 | assert(len(master_widget)<=1 ) |
|
304 | 306 | if len(master_widget)==0: |
|
305 | 307 | return None |
|
306 | 308 | |
|
307 | 309 | return master_widget[0] |
|
308 | 310 | |
|
309 | 311 | def find_slave_widgets(self,tab): |
|
310 | 312 | """return all the frontends that do not own the kernel attached to the given widget/tab. |
|
311 | 313 | |
|
312 | 314 | Only find frontends owned by the current application. Selection |
|
313 | 315 | based on connection file of the kernel. |
|
314 | 316 | |
|
315 | 317 | This function does the conversion tabNumber/widget if needed. |
|
316 | 318 | """ |
|
317 | 319 | #convert from/to int/richIpythonWidget if needed |
|
318 | 320 | if isinstance(tab, int): |
|
319 | 321 | tab = self.tab_widget.widget(tab) |
|
320 | 322 | km=tab.kernel_client |
|
321 | 323 | |
|
322 | 324 | #build list of all widgets |
|
323 | 325 | widget_list = [self.tab_widget.widget(i) for i in range(self.tab_widget.count())] |
|
324 | 326 | |
|
325 | 327 | # widget that are candidate not to be the owner of the kernel does have all the same port of the curent widget |
|
326 | 328 | filtered_widget_list = ( widget for widget in widget_list if |
|
327 | 329 | widget.kernel_client.connection_file == km.connection_file) |
|
328 | 330 | # Get a list of all widget owning the same kernel and removed it from |
|
329 | 331 | # the previous cadidate. (better using sets ?) |
|
330 | 332 | master_widget_list = self.find_master_tab(tab, as_list=True) |
|
331 | 333 | slave_list = [widget for widget in filtered_widget_list if widget not in master_widget_list] |
|
332 | 334 | |
|
333 | 335 | return slave_list |
|
334 | 336 | |
|
335 | 337 | # Populate the menu bar with common actions and shortcuts |
|
336 | 338 | def add_menu_action(self, menu, action, defer_shortcut=False): |
|
337 | 339 | """Add action to menu as well as self |
|
338 | 340 | |
|
339 | 341 | So that when the menu bar is invisible, its actions are still available. |
|
340 | 342 | |
|
341 | 343 | If defer_shortcut is True, set the shortcut context to widget-only, |
|
342 | 344 | where it will avoid conflict with shortcuts already bound to the |
|
343 | 345 | widgets themselves. |
|
344 | 346 | """ |
|
345 | 347 | menu.addAction(action) |
|
346 | 348 | self.addAction(action) |
|
347 | 349 | |
|
348 | 350 | if defer_shortcut: |
|
349 | 351 | action.setShortcutContext(QtCore.Qt.WidgetShortcut) |
|
350 | 352 | |
|
351 | 353 | def init_menu_bar(self): |
|
352 | 354 | #create menu in the order they should appear in the menu bar |
|
353 | 355 | self.init_file_menu() |
|
354 | 356 | self.init_edit_menu() |
|
355 | 357 | self.init_view_menu() |
|
356 | 358 | self.init_kernel_menu() |
|
357 | 359 | self.init_magic_menu() |
|
358 | 360 | self.init_window_menu() |
|
359 | 361 | self.init_help_menu() |
|
360 | 362 | |
|
361 | 363 | def init_file_menu(self): |
|
362 | 364 | self.file_menu = self.menuBar().addMenu("&File") |
|
363 | 365 | |
|
364 | 366 | self.new_kernel_tab_act = QtGui.QAction("New Tab with &New kernel", |
|
365 | 367 | self, |
|
366 | 368 | shortcut="Ctrl+T", |
|
367 | 369 | triggered=self.create_tab_with_new_frontend) |
|
368 | 370 | self.add_menu_action(self.file_menu, self.new_kernel_tab_act) |
|
369 | 371 | |
|
370 | 372 | self.slave_kernel_tab_act = QtGui.QAction("New Tab with Sa&me kernel", |
|
371 | 373 | self, |
|
372 | 374 | shortcut="Ctrl+Shift+T", |
|
373 | 375 | triggered=self.create_tab_with_current_kernel) |
|
374 | 376 | self.add_menu_action(self.file_menu, self.slave_kernel_tab_act) |
|
375 | 377 | |
|
376 | 378 | self.file_menu.addSeparator() |
|
377 | 379 | |
|
378 | 380 | self.close_action=QtGui.QAction("&Close Tab", |
|
379 | 381 | self, |
|
380 | 382 | shortcut=QtGui.QKeySequence.Close, |
|
381 | 383 | triggered=self.close_active_frontend |
|
382 | 384 | ) |
|
383 | 385 | self.add_menu_action(self.file_menu, self.close_action) |
|
384 | 386 | |
|
385 | 387 | self.export_action=QtGui.QAction("&Save to HTML/XHTML", |
|
386 | 388 | self, |
|
387 | 389 | shortcut=QtGui.QKeySequence.Save, |
|
388 | 390 | triggered=self.export_action_active_frontend |
|
389 | 391 | ) |
|
390 | 392 | self.add_menu_action(self.file_menu, self.export_action, True) |
|
391 | 393 | |
|
392 | 394 | self.file_menu.addSeparator() |
|
393 | 395 | |
|
394 | 396 | printkey = QtGui.QKeySequence(QtGui.QKeySequence.Print) |
|
395 | 397 | if printkey.matches("Ctrl+P") and sys.platform != 'darwin': |
|
396 | 398 | # Only override the default if there is a collision. |
|
397 | 399 | # Qt ctrl = cmd on OSX, so the match gets a false positive on OSX. |
|
398 | 400 | printkey = "Ctrl+Shift+P" |
|
399 | 401 | self.print_action = QtGui.QAction("&Print", |
|
400 | 402 | self, |
|
401 | 403 | shortcut=printkey, |
|
402 | 404 | triggered=self.print_action_active_frontend) |
|
403 | 405 | self.add_menu_action(self.file_menu, self.print_action, True) |
|
404 | 406 | |
|
405 | 407 | if sys.platform != 'darwin': |
|
406 | 408 | # OSX always has Quit in the Application menu, only add it |
|
407 | 409 | # to the File menu elsewhere. |
|
408 | 410 | |
|
409 | 411 | self.file_menu.addSeparator() |
|
410 | 412 | |
|
411 | 413 | self.quit_action = QtGui.QAction("&Quit", |
|
412 | 414 | self, |
|
413 | 415 | shortcut=QtGui.QKeySequence.Quit, |
|
414 | 416 | triggered=self.close, |
|
415 | 417 | ) |
|
416 | 418 | self.add_menu_action(self.file_menu, self.quit_action) |
|
417 | 419 | |
|
418 | 420 | |
|
419 | 421 | def init_edit_menu(self): |
|
420 | 422 | self.edit_menu = self.menuBar().addMenu("&Edit") |
|
421 | 423 | |
|
422 | 424 | self.undo_action = QtGui.QAction("&Undo", |
|
423 | 425 | self, |
|
424 | 426 | shortcut=QtGui.QKeySequence.Undo, |
|
425 | 427 | statusTip="Undo last action if possible", |
|
426 | 428 | triggered=self.undo_active_frontend |
|
427 | 429 | ) |
|
428 | 430 | self.add_menu_action(self.edit_menu, self.undo_action) |
|
429 | 431 | |
|
430 | 432 | self.redo_action = QtGui.QAction("&Redo", |
|
431 | 433 | self, |
|
432 | 434 | shortcut=QtGui.QKeySequence.Redo, |
|
433 | 435 | statusTip="Redo last action if possible", |
|
434 | 436 | triggered=self.redo_active_frontend) |
|
435 | 437 | self.add_menu_action(self.edit_menu, self.redo_action) |
|
436 | 438 | |
|
437 | 439 | self.edit_menu.addSeparator() |
|
438 | 440 | |
|
439 | 441 | self.cut_action = QtGui.QAction("&Cut", |
|
440 | 442 | self, |
|
441 | 443 | shortcut=QtGui.QKeySequence.Cut, |
|
442 | 444 | triggered=self.cut_active_frontend |
|
443 | 445 | ) |
|
444 | 446 | self.add_menu_action(self.edit_menu, self.cut_action, True) |
|
445 | 447 | |
|
446 | 448 | self.copy_action = QtGui.QAction("&Copy", |
|
447 | 449 | self, |
|
448 | 450 | shortcut=QtGui.QKeySequence.Copy, |
|
449 | 451 | triggered=self.copy_active_frontend |
|
450 | 452 | ) |
|
451 | 453 | self.add_menu_action(self.edit_menu, self.copy_action, True) |
|
452 | 454 | |
|
453 | 455 | self.copy_raw_action = QtGui.QAction("Copy (&Raw Text)", |
|
454 | 456 | self, |
|
455 | 457 | shortcut="Ctrl+Shift+C", |
|
456 | 458 | triggered=self.copy_raw_active_frontend |
|
457 | 459 | ) |
|
458 | 460 | self.add_menu_action(self.edit_menu, self.copy_raw_action, True) |
|
459 | 461 | |
|
460 | 462 | self.paste_action = QtGui.QAction("&Paste", |
|
461 | 463 | self, |
|
462 | 464 | shortcut=QtGui.QKeySequence.Paste, |
|
463 | 465 | triggered=self.paste_active_frontend |
|
464 | 466 | ) |
|
465 | 467 | self.add_menu_action(self.edit_menu, self.paste_action, True) |
|
466 | 468 | |
|
467 | 469 | self.edit_menu.addSeparator() |
|
468 | 470 | |
|
469 | 471 | selectall = QtGui.QKeySequence(QtGui.QKeySequence.SelectAll) |
|
470 | 472 | if selectall.matches("Ctrl+A") and sys.platform != 'darwin': |
|
471 | 473 | # Only override the default if there is a collision. |
|
472 | 474 | # Qt ctrl = cmd on OSX, so the match gets a false positive on OSX. |
|
473 | 475 | selectall = "Ctrl+Shift+A" |
|
474 | 476 | self.select_all_action = QtGui.QAction("Select &All", |
|
475 | 477 | self, |
|
476 | 478 | shortcut=selectall, |
|
477 | 479 | triggered=self.select_all_active_frontend |
|
478 | 480 | ) |
|
479 | 481 | self.add_menu_action(self.edit_menu, self.select_all_action, True) |
|
480 | 482 | |
|
481 | 483 | |
|
482 | 484 | def init_view_menu(self): |
|
483 | 485 | self.view_menu = self.menuBar().addMenu("&View") |
|
484 | 486 | |
|
485 | 487 | if sys.platform != 'darwin': |
|
486 | 488 | # disable on OSX, where there is always a menu bar |
|
487 | 489 | self.toggle_menu_bar_act = QtGui.QAction("Toggle &Menu Bar", |
|
488 | 490 | self, |
|
489 | 491 | shortcut="Ctrl+Shift+M", |
|
490 | 492 | statusTip="Toggle visibility of menubar", |
|
491 | 493 | triggered=self.toggle_menu_bar) |
|
492 | 494 | self.add_menu_action(self.view_menu, self.toggle_menu_bar_act) |
|
493 | 495 | |
|
494 | 496 | fs_key = "Ctrl+Meta+F" if sys.platform == 'darwin' else "F11" |
|
495 | 497 | self.full_screen_act = QtGui.QAction("&Full Screen", |
|
496 | 498 | self, |
|
497 | 499 | shortcut=fs_key, |
|
498 | 500 | statusTip="Toggle between Fullscreen and Normal Size", |
|
499 | 501 | triggered=self.toggleFullScreen) |
|
500 | 502 | self.add_menu_action(self.view_menu, self.full_screen_act) |
|
501 | 503 | |
|
502 | 504 | self.view_menu.addSeparator() |
|
503 | 505 | |
|
504 | 506 | self.increase_font_size = QtGui.QAction("Zoom &In", |
|
505 | 507 | self, |
|
506 | 508 | shortcut=QtGui.QKeySequence.ZoomIn, |
|
507 | 509 | triggered=self.increase_font_size_active_frontend |
|
508 | 510 | ) |
|
509 | 511 | self.add_menu_action(self.view_menu, self.increase_font_size, True) |
|
510 | 512 | |
|
511 | 513 | self.decrease_font_size = QtGui.QAction("Zoom &Out", |
|
512 | 514 | self, |
|
513 | 515 | shortcut=QtGui.QKeySequence.ZoomOut, |
|
514 | 516 | triggered=self.decrease_font_size_active_frontend |
|
515 | 517 | ) |
|
516 | 518 | self.add_menu_action(self.view_menu, self.decrease_font_size, True) |
|
517 | 519 | |
|
518 | 520 | self.reset_font_size = QtGui.QAction("Zoom &Reset", |
|
519 | 521 | self, |
|
520 | 522 | shortcut="Ctrl+0", |
|
521 | 523 | triggered=self.reset_font_size_active_frontend |
|
522 | 524 | ) |
|
523 | 525 | self.add_menu_action(self.view_menu, self.reset_font_size, True) |
|
524 | 526 | |
|
525 | 527 | self.view_menu.addSeparator() |
|
526 | 528 | |
|
527 | 529 | self.clear_action = QtGui.QAction("&Clear Screen", |
|
528 | 530 | self, |
|
529 | 531 | shortcut='Ctrl+L', |
|
530 | 532 | statusTip="Clear the console", |
|
531 | 533 | triggered=self.clear_magic_active_frontend) |
|
532 | 534 | self.add_menu_action(self.view_menu, self.clear_action) |
|
533 | 535 | |
|
534 | 536 | self.pager_menu = self.view_menu.addMenu("&Pager") |
|
535 | 537 | |
|
536 | 538 | hsplit_action = QtGui.QAction(".. &Horizontal Split", |
|
537 | 539 | self, |
|
538 | 540 | triggered=lambda: self.set_paging_active_frontend('hsplit')) |
|
539 | 541 | |
|
540 | 542 | vsplit_action = QtGui.QAction(" : &Vertical Split", |
|
541 | 543 | self, |
|
542 | 544 | triggered=lambda: self.set_paging_active_frontend('vsplit')) |
|
543 | 545 | |
|
544 | 546 | inside_action = QtGui.QAction(" &Inside Pager", |
|
545 | 547 | self, |
|
546 | 548 | triggered=lambda: self.set_paging_active_frontend('inside')) |
|
547 | 549 | |
|
548 | 550 | self.pager_menu.addAction(hsplit_action) |
|
549 | 551 | self.pager_menu.addAction(vsplit_action) |
|
550 | 552 | self.pager_menu.addAction(inside_action) |
|
551 | 553 | |
|
552 | 554 | def init_kernel_menu(self): |
|
553 | 555 | self.kernel_menu = self.menuBar().addMenu("&Kernel") |
|
554 | 556 | # Qt on OSX maps Ctrl to Cmd, and Meta to Ctrl |
|
555 | 557 | # keep the signal shortcuts to ctrl, rather than |
|
556 | 558 | # platform-default like we do elsewhere. |
|
557 | 559 | |
|
558 | 560 | ctrl = "Meta" if sys.platform == 'darwin' else "Ctrl" |
|
559 | 561 | |
|
560 | 562 | self.interrupt_kernel_action = QtGui.QAction("&Interrupt current Kernel", |
|
561 | 563 | self, |
|
562 | 564 | triggered=self.interrupt_kernel_active_frontend, |
|
563 | 565 | shortcut=ctrl+"+C", |
|
564 | 566 | ) |
|
565 | 567 | self.add_menu_action(self.kernel_menu, self.interrupt_kernel_action) |
|
566 | 568 | |
|
567 | 569 | self.restart_kernel_action = QtGui.QAction("&Restart current Kernel", |
|
568 | 570 | self, |
|
569 | 571 | triggered=self.restart_kernel_active_frontend, |
|
570 | 572 | shortcut=ctrl+"+.", |
|
571 | 573 | ) |
|
572 | 574 | self.add_menu_action(self.kernel_menu, self.restart_kernel_action) |
|
573 | 575 | |
|
574 | 576 | self.kernel_menu.addSeparator() |
|
575 | 577 | |
|
576 | 578 | self.confirm_restart_kernel_action = QtGui.QAction("&Confirm kernel restart", |
|
577 | 579 | self, |
|
578 | 580 | checkable=True, |
|
579 | 581 | checked=self.active_frontend.confirm_restart, |
|
580 | 582 | triggered=self.toggle_confirm_restart_active_frontend |
|
581 | 583 | ) |
|
582 | 584 | |
|
583 | 585 | self.add_menu_action(self.kernel_menu, self.confirm_restart_kernel_action) |
|
584 | 586 | self.tab_widget.currentChanged.connect(self.update_restart_checkbox) |
|
585 | 587 | |
|
586 | 588 | def _make_dynamic_magic(self,magic): |
|
587 | 589 | """Return a function `fun` that will execute `magic` on active frontend. |
|
588 | 590 | |
|
589 | 591 | Parameters |
|
590 | 592 | ---------- |
|
591 | 593 | magic : string |
|
592 | 594 | string that will be executed as is when the returned function is called |
|
593 | 595 | |
|
594 | 596 | Returns |
|
595 | 597 | ------- |
|
596 | 598 | fun : function |
|
597 | 599 | function with no parameters, when called will execute `magic` on the |
|
598 | 600 | current active frontend at call time |
|
599 | 601 | |
|
600 | 602 | See Also |
|
601 | 603 | -------- |
|
602 | 604 | populate_all_magic_menu : generate the "All Magics..." menu |
|
603 | 605 | |
|
604 | 606 | Notes |
|
605 | 607 | ----- |
|
606 | 608 | `fun` executes `magic` in active frontend at the moment it is triggered, |
|
607 | 609 | not the active frontend at the moment it was created. |
|
608 | 610 | |
|
609 | 611 | This function is mostly used to create the "All Magics..." Menu at run time. |
|
610 | 612 | """ |
|
611 | 613 | # need two level nested function to be sure to pass magic |
|
612 | 614 | # to active frontend **at run time**. |
|
613 | 615 | def inner_dynamic_magic(): |
|
614 | 616 | self.active_frontend.execute(magic) |
|
615 | 617 | inner_dynamic_magic.__name__ = "dynamics_magic_s" |
|
616 | 618 | return inner_dynamic_magic |
|
617 | 619 | |
|
618 |
def populate_all_magic_menu(self, |
|
|
619 |
"""Clean "All Magics..." menu and repopulate it with ` |
|
|
620 | def populate_all_magic_menu(self, display_data=None): | |
|
621 | """Clean "All Magics..." menu and repopulate it with `display_data` | |
|
620 | 622 | |
|
621 | 623 | Parameters |
|
622 | 624 | ---------- |
|
623 | listofmagic : string, | |
|
624 | repr() of a list of strings, send back by the kernel | |
|
625 | display_data : dict, | |
|
626 | dict of display_data for the magics dict of a MagicsManager. | |
|
627 | Expects json data, as the result of %lsmagic | |
|
625 | 628 | |
|
626 | Notes | |
|
627 | ----- | |
|
628 | `listofmagic`is a repr() of list because it is fed with the result of | |
|
629 | a 'user_expression' | |
|
630 | 629 | """ |
|
631 | 630 | for k,v in self._magic_menu_dict.items(): |
|
632 | 631 | v.clear() |
|
633 | 632 | self.all_magic_menu.clear() |
|
634 | 633 | |
|
634 | if not display_data: | |
|
635 | return | |
|
635 | 636 | |
|
636 | mlist=ast.literal_eval(listofmagic) | |
|
637 | for magic in mlist: | |
|
638 | cell = (magic['type'] == 'cell') | |
|
639 | name = magic['name'] | |
|
640 | mclass = magic['class'] | |
|
641 | if cell : | |
|
642 | prefix='%%' | |
|
643 | else : | |
|
644 | prefix='%' | |
|
645 | magic_menu = self._get_magic_menu(mclass) | |
|
637 | if display_data['status'] != 'ok': | |
|
638 | self.log.warn("%%lsmagic user-expression failed: %s" % display_data) | |
|
639 | return | |
|
646 | 640 | |
|
647 | pmagic = '%s%s'%(prefix,name) | |
|
641 | mdict = json.loads(display_data['data'].get('application/json', {})) | |
|
648 | 642 | |
|
643 | for mtype in sorted(mdict): | |
|
644 | subdict = mdict[mtype] | |
|
645 | prefix = magic_escapes[mtype] | |
|
646 | for name in sorted(subdict): | |
|
647 | mclass = subdict[name] | |
|
648 | magic_menu = self._get_magic_menu(mclass) | |
|
649 | pmagic = prefix + name | |
|
649 | 650 | xaction = QtGui.QAction(pmagic, |
|
650 | 651 | self, |
|
651 | 652 | triggered=self._make_dynamic_magic(pmagic) |
|
652 | 653 | ) |
|
653 | 654 | magic_menu.addAction(xaction) |
|
654 | 655 | self.all_magic_menu.addAction(xaction) |
|
655 | 656 | |
|
656 | 657 | def update_all_magic_menu(self): |
|
657 | 658 | """ Update the list of magics in the "All Magics..." Menu |
|
658 | 659 | |
|
659 | 660 | Request the kernel with the list of available magics and populate the |
|
660 | 661 | menu with the list received back |
|
661 | 662 | |
|
662 | 663 | """ |
|
663 |
self.active_frontend._silent_exec_callback('get_ipython().magic |
|
|
664 | self.active_frontend._silent_exec_callback('get_ipython().magic("lsmagic")', | |
|
664 | 665 | self.populate_all_magic_menu) |
|
665 | 666 | |
|
666 | 667 | def _get_magic_menu(self,menuidentifier, menulabel=None): |
|
667 | 668 | """return a submagic menu by name, and create it if needed |
|
668 | 669 | |
|
669 | 670 | parameters: |
|
670 | 671 | ----------- |
|
671 | 672 | |
|
672 | 673 | menulabel : str |
|
673 | 674 | Label for the menu |
|
674 | 675 | |
|
675 | 676 | Will infere the menu name from the identifier at creation if menulabel not given. |
|
676 | 677 | To do so you have too give menuidentifier as a CamelCassedString |
|
677 | 678 | """ |
|
678 | 679 | menu = self._magic_menu_dict.get(menuidentifier,None) |
|
679 | 680 | if not menu : |
|
680 | 681 | if not menulabel: |
|
681 | 682 | menulabel = re.sub("([a-zA-Z]+)([A-Z][a-z])","\g<1> \g<2>",menuidentifier) |
|
682 | 683 | menu = QtGui.QMenu(menulabel,self.magic_menu) |
|
683 | 684 | self._magic_menu_dict[menuidentifier]=menu |
|
684 | 685 | self.magic_menu.insertMenu(self.magic_menu_separator,menu) |
|
685 | 686 | return menu |
|
686 | 687 | |
|
687 | 688 | |
|
688 | 689 | |
|
689 | 690 | def init_magic_menu(self): |
|
690 | 691 | self.magic_menu = self.menuBar().addMenu("&Magic") |
|
691 | 692 | self.magic_menu_separator = self.magic_menu.addSeparator() |
|
692 | 693 | |
|
693 | 694 | self.all_magic_menu = self._get_magic_menu("AllMagics", menulabel="&All Magics...") |
|
694 | 695 | |
|
695 | 696 | # This action should usually not appear as it will be cleared when menu |
|
696 | 697 | # is updated at first kernel response. Though, it is necessary when |
|
697 | 698 | # connecting through X-forwarding, as in this case, the menu is not |
|
698 | 699 | # auto updated, SO DO NOT DELETE. |
|
699 | 700 | self.pop = QtGui.QAction("&Update All Magic Menu ", |
|
700 | 701 | self, triggered=self.update_all_magic_menu) |
|
701 | 702 | self.add_menu_action(self.all_magic_menu, self.pop) |
|
702 | 703 | # we need to populate the 'Magic Menu' once the kernel has answer at |
|
703 | 704 | # least once let's do it immediately, but it's assured to works |
|
704 | 705 | self.pop.trigger() |
|
705 | 706 | |
|
706 | 707 | self.reset_action = QtGui.QAction("&Reset", |
|
707 | 708 | self, |
|
708 | 709 | statusTip="Clear all variables from workspace", |
|
709 | 710 | triggered=self.reset_magic_active_frontend) |
|
710 | 711 | self.add_menu_action(self.magic_menu, self.reset_action) |
|
711 | 712 | |
|
712 | 713 | self.history_action = QtGui.QAction("&History", |
|
713 | 714 | self, |
|
714 | 715 | statusTip="show command history", |
|
715 | 716 | triggered=self.history_magic_active_frontend) |
|
716 | 717 | self.add_menu_action(self.magic_menu, self.history_action) |
|
717 | 718 | |
|
718 | 719 | self.save_action = QtGui.QAction("E&xport History ", |
|
719 | 720 | self, |
|
720 | 721 | statusTip="Export History as Python File", |
|
721 | 722 | triggered=self.save_magic_active_frontend) |
|
722 | 723 | self.add_menu_action(self.magic_menu, self.save_action) |
|
723 | 724 | |
|
724 | 725 | self.who_action = QtGui.QAction("&Who", |
|
725 | 726 | self, |
|
726 | 727 | statusTip="List interactive variables", |
|
727 | 728 | triggered=self.who_magic_active_frontend) |
|
728 | 729 | self.add_menu_action(self.magic_menu, self.who_action) |
|
729 | 730 | |
|
730 | 731 | self.who_ls_action = QtGui.QAction("Wh&o ls", |
|
731 | 732 | self, |
|
732 | 733 | statusTip="Return a list of interactive variables", |
|
733 | 734 | triggered=self.who_ls_magic_active_frontend) |
|
734 | 735 | self.add_menu_action(self.magic_menu, self.who_ls_action) |
|
735 | 736 | |
|
736 | 737 | self.whos_action = QtGui.QAction("Who&s", |
|
737 | 738 | self, |
|
738 | 739 | statusTip="List interactive variables with details", |
|
739 | 740 | triggered=self.whos_magic_active_frontend) |
|
740 | 741 | self.add_menu_action(self.magic_menu, self.whos_action) |
|
741 | 742 | |
|
742 | 743 | def init_window_menu(self): |
|
743 | 744 | self.window_menu = self.menuBar().addMenu("&Window") |
|
744 | 745 | if sys.platform == 'darwin': |
|
745 | 746 | # add min/maximize actions to OSX, which lacks default bindings. |
|
746 | 747 | self.minimizeAct = QtGui.QAction("Mini&mize", |
|
747 | 748 | self, |
|
748 | 749 | shortcut="Ctrl+m", |
|
749 | 750 | statusTip="Minimize the window/Restore Normal Size", |
|
750 | 751 | triggered=self.toggleMinimized) |
|
751 | 752 | # maximize is called 'Zoom' on OSX for some reason |
|
752 | 753 | self.maximizeAct = QtGui.QAction("&Zoom", |
|
753 | 754 | self, |
|
754 | 755 | shortcut="Ctrl+Shift+M", |
|
755 | 756 | statusTip="Maximize the window/Restore Normal Size", |
|
756 | 757 | triggered=self.toggleMaximized) |
|
757 | 758 | |
|
758 | 759 | self.add_menu_action(self.window_menu, self.minimizeAct) |
|
759 | 760 | self.add_menu_action(self.window_menu, self.maximizeAct) |
|
760 | 761 | self.window_menu.addSeparator() |
|
761 | 762 | |
|
762 | 763 | prev_key = "Ctrl+Shift+Left" if sys.platform == 'darwin' else "Ctrl+PgUp" |
|
763 | 764 | self.prev_tab_act = QtGui.QAction("Pre&vious Tab", |
|
764 | 765 | self, |
|
765 | 766 | shortcut=prev_key, |
|
766 | 767 | statusTip="Select previous tab", |
|
767 | 768 | triggered=self.prev_tab) |
|
768 | 769 | self.add_menu_action(self.window_menu, self.prev_tab_act) |
|
769 | 770 | |
|
770 | 771 | next_key = "Ctrl+Shift+Right" if sys.platform == 'darwin' else "Ctrl+PgDown" |
|
771 | 772 | self.next_tab_act = QtGui.QAction("Ne&xt Tab", |
|
772 | 773 | self, |
|
773 | 774 | shortcut=next_key, |
|
774 | 775 | statusTip="Select next tab", |
|
775 | 776 | triggered=self.next_tab) |
|
776 | 777 | self.add_menu_action(self.window_menu, self.next_tab_act) |
|
777 | 778 | |
|
778 | 779 | def init_help_menu(self): |
|
779 | 780 | # please keep the Help menu in Mac Os even if empty. It will |
|
780 | 781 | # automatically contain a search field to search inside menus and |
|
781 | 782 | # please keep it spelled in English, as long as Qt Doesn't support |
|
782 | 783 | # a QAction.MenuRole like HelpMenuRole otherwise it will lose |
|
783 | 784 | # this search field functionality |
|
784 | 785 | |
|
785 | 786 | self.help_menu = self.menuBar().addMenu("&Help") |
|
786 | 787 | |
|
787 | 788 | |
|
788 | 789 | # Help Menu |
|
789 | 790 | |
|
790 | 791 | self.intro_active_frontend_action = QtGui.QAction("&Intro to IPython", |
|
791 | 792 | self, |
|
792 | 793 | triggered=self.intro_active_frontend |
|
793 | 794 | ) |
|
794 | 795 | self.add_menu_action(self.help_menu, self.intro_active_frontend_action) |
|
795 | 796 | |
|
796 | 797 | self.quickref_active_frontend_action = QtGui.QAction("IPython &Cheat Sheet", |
|
797 | 798 | self, |
|
798 | 799 | triggered=self.quickref_active_frontend |
|
799 | 800 | ) |
|
800 | 801 | self.add_menu_action(self.help_menu, self.quickref_active_frontend_action) |
|
801 | 802 | |
|
802 | 803 | self.guiref_active_frontend_action = QtGui.QAction("&Qt Console", |
|
803 | 804 | self, |
|
804 | 805 | triggered=self.guiref_active_frontend |
|
805 | 806 | ) |
|
806 | 807 | self.add_menu_action(self.help_menu, self.guiref_active_frontend_action) |
|
807 | 808 | |
|
808 | 809 | self.onlineHelpAct = QtGui.QAction("Open Online &Help", |
|
809 | 810 | self, |
|
810 | 811 | triggered=self._open_online_help) |
|
811 | 812 | self.add_menu_action(self.help_menu, self.onlineHelpAct) |
|
812 | 813 | |
|
813 | 814 | # minimize/maximize/fullscreen actions: |
|
814 | 815 | |
|
815 | 816 | def toggle_menu_bar(self): |
|
816 | 817 | menu_bar = self.menuBar() |
|
817 | 818 | if menu_bar.isVisible(): |
|
818 | 819 | menu_bar.setVisible(False) |
|
819 | 820 | else: |
|
820 | 821 | menu_bar.setVisible(True) |
|
821 | 822 | |
|
822 | 823 | def toggleMinimized(self): |
|
823 | 824 | if not self.isMinimized(): |
|
824 | 825 | self.showMinimized() |
|
825 | 826 | else: |
|
826 | 827 | self.showNormal() |
|
827 | 828 | |
|
828 | 829 | def _open_online_help(self): |
|
829 | 830 | filename="http://ipython.org/ipython-doc/stable/index.html" |
|
830 | 831 | webbrowser.open(filename, new=1, autoraise=True) |
|
831 | 832 | |
|
832 | 833 | def toggleMaximized(self): |
|
833 | 834 | if not self.isMaximized(): |
|
834 | 835 | self.showMaximized() |
|
835 | 836 | else: |
|
836 | 837 | self.showNormal() |
|
837 | 838 | |
|
838 | 839 | # Min/Max imizing while in full screen give a bug |
|
839 | 840 | # when going out of full screen, at least on OSX |
|
840 | 841 | def toggleFullScreen(self): |
|
841 | 842 | if not self.isFullScreen(): |
|
842 | 843 | self.showFullScreen() |
|
843 | 844 | if sys.platform == 'darwin': |
|
844 | 845 | self.maximizeAct.setEnabled(False) |
|
845 | 846 | self.minimizeAct.setEnabled(False) |
|
846 | 847 | else: |
|
847 | 848 | self.showNormal() |
|
848 | 849 | if sys.platform == 'darwin': |
|
849 | 850 | self.maximizeAct.setEnabled(True) |
|
850 | 851 | self.minimizeAct.setEnabled(True) |
|
851 | 852 | |
|
852 | 853 | def set_paging_active_frontend(self, paging): |
|
853 | 854 | self.active_frontend._set_paging(paging) |
|
854 | 855 | |
|
855 | 856 | def close_active_frontend(self): |
|
856 | 857 | self.close_tab(self.active_frontend) |
|
857 | 858 | |
|
858 | 859 | def restart_kernel_active_frontend(self): |
|
859 | 860 | self.active_frontend.request_restart_kernel() |
|
860 | 861 | |
|
861 | 862 | def interrupt_kernel_active_frontend(self): |
|
862 | 863 | self.active_frontend.request_interrupt_kernel() |
|
863 | 864 | |
|
864 | 865 | def toggle_confirm_restart_active_frontend(self): |
|
865 | 866 | widget = self.active_frontend |
|
866 | 867 | widget.confirm_restart = not widget.confirm_restart |
|
867 | 868 | self.confirm_restart_kernel_action.setChecked(widget.confirm_restart) |
|
868 | 869 | |
|
869 | 870 | def update_restart_checkbox(self): |
|
870 | 871 | if self.active_frontend is None: |
|
871 | 872 | return |
|
872 | 873 | widget = self.active_frontend |
|
873 | 874 | self.confirm_restart_kernel_action.setChecked(widget.confirm_restart) |
|
874 | 875 | |
|
875 | 876 | def cut_active_frontend(self): |
|
876 | 877 | widget = self.active_frontend |
|
877 | 878 | if widget.can_cut(): |
|
878 | 879 | widget.cut() |
|
879 | 880 | |
|
880 | 881 | def copy_active_frontend(self): |
|
881 | 882 | widget = self.active_frontend |
|
882 | 883 | widget.copy() |
|
883 | 884 | |
|
884 | 885 | def copy_raw_active_frontend(self): |
|
885 | 886 | self.active_frontend._copy_raw_action.trigger() |
|
886 | 887 | |
|
887 | 888 | def paste_active_frontend(self): |
|
888 | 889 | widget = self.active_frontend |
|
889 | 890 | if widget.can_paste(): |
|
890 | 891 | widget.paste() |
|
891 | 892 | |
|
892 | 893 | def undo_active_frontend(self): |
|
893 | 894 | self.active_frontend.undo() |
|
894 | 895 | |
|
895 | 896 | def redo_active_frontend(self): |
|
896 | 897 | self.active_frontend.redo() |
|
897 | 898 | |
|
898 | 899 | def reset_magic_active_frontend(self): |
|
899 | 900 | self.active_frontend.execute("%reset") |
|
900 | 901 | |
|
901 | 902 | def history_magic_active_frontend(self): |
|
902 | 903 | self.active_frontend.execute("%history") |
|
903 | 904 | |
|
904 | 905 | def save_magic_active_frontend(self): |
|
905 | 906 | self.active_frontend.save_magic() |
|
906 | 907 | |
|
907 | 908 | def clear_magic_active_frontend(self): |
|
908 | 909 | self.active_frontend.execute("%clear") |
|
909 | 910 | |
|
910 | 911 | def who_magic_active_frontend(self): |
|
911 | 912 | self.active_frontend.execute("%who") |
|
912 | 913 | |
|
913 | 914 | def who_ls_magic_active_frontend(self): |
|
914 | 915 | self.active_frontend.execute("%who_ls") |
|
915 | 916 | |
|
916 | 917 | def whos_magic_active_frontend(self): |
|
917 | 918 | self.active_frontend.execute("%whos") |
|
918 | 919 | |
|
919 | 920 | def print_action_active_frontend(self): |
|
920 | 921 | self.active_frontend.print_action.trigger() |
|
921 | 922 | |
|
922 | 923 | def export_action_active_frontend(self): |
|
923 | 924 | self.active_frontend.export_action.trigger() |
|
924 | 925 | |
|
925 | 926 | def select_all_active_frontend(self): |
|
926 | 927 | self.active_frontend.select_all_action.trigger() |
|
927 | 928 | |
|
928 | 929 | def increase_font_size_active_frontend(self): |
|
929 | 930 | self.active_frontend.increase_font_size.trigger() |
|
930 | 931 | |
|
931 | 932 | def decrease_font_size_active_frontend(self): |
|
932 | 933 | self.active_frontend.decrease_font_size.trigger() |
|
933 | 934 | |
|
934 | 935 | def reset_font_size_active_frontend(self): |
|
935 | 936 | self.active_frontend.reset_font_size.trigger() |
|
936 | 937 | |
|
937 | 938 | def guiref_active_frontend(self): |
|
938 | 939 | self.active_frontend.execute("%guiref") |
|
939 | 940 | |
|
940 | 941 | def intro_active_frontend(self): |
|
941 | 942 | self.active_frontend.execute("?") |
|
942 | 943 | |
|
943 | 944 | def quickref_active_frontend(self): |
|
944 | 945 | self.active_frontend.execute("%quickref") |
|
945 | 946 | #--------------------------------------------------------------------------- |
|
946 | 947 | # QWidget interface |
|
947 | 948 | #--------------------------------------------------------------------------- |
|
948 | 949 | |
|
949 | 950 | def closeEvent(self, event): |
|
950 | 951 | """ Forward the close event to every tabs contained by the windows |
|
951 | 952 | """ |
|
952 | 953 | if self.tab_widget.count() == 0: |
|
953 | 954 | # no tabs, just close |
|
954 | 955 | event.accept() |
|
955 | 956 | return |
|
956 | 957 | # Do Not loop on the widget count as it change while closing |
|
957 | 958 | title = self.window().windowTitle() |
|
958 | 959 | cancel = QtGui.QMessageBox.Cancel |
|
959 | 960 | okay = QtGui.QMessageBox.Ok |
|
960 | 961 | |
|
961 | 962 | if self.confirm_exit: |
|
962 | 963 | if self.tab_widget.count() > 1: |
|
963 | 964 | msg = "Close all tabs, stop all kernels, and Quit?" |
|
964 | 965 | else: |
|
965 | 966 | msg = "Close console, stop kernel, and Quit?" |
|
966 | 967 | info = "Kernels not started here (e.g. notebooks) will be left alone." |
|
967 | 968 | closeall = QtGui.QPushButton("&Quit", self) |
|
968 | 969 | closeall.setShortcut('Q') |
|
969 | 970 | box = QtGui.QMessageBox(QtGui.QMessageBox.Question, |
|
970 | 971 | title, msg) |
|
971 | 972 | box.setInformativeText(info) |
|
972 | 973 | box.addButton(cancel) |
|
973 | 974 | box.addButton(closeall, QtGui.QMessageBox.YesRole) |
|
974 | 975 | box.setDefaultButton(closeall) |
|
975 | 976 | box.setEscapeButton(cancel) |
|
976 | 977 | pixmap = QtGui.QPixmap(self._app.icon.pixmap(QtCore.QSize(64,64))) |
|
977 | 978 | box.setIconPixmap(pixmap) |
|
978 | 979 | reply = box.exec_() |
|
979 | 980 | else: |
|
980 | 981 | reply = okay |
|
981 | 982 | |
|
982 | 983 | if reply == cancel: |
|
983 | 984 | event.ignore() |
|
984 | 985 | return |
|
985 | 986 | if reply == okay: |
|
986 | 987 | while self.tab_widget.count() >= 1: |
|
987 | 988 | # prevent further confirmations: |
|
988 | 989 | widget = self.active_frontend |
|
989 | 990 | widget._confirm_exit = False |
|
990 | 991 | self.close_tab(widget) |
|
991 | 992 | event.accept() |
|
992 | 993 |
@@ -1,483 +1,511 b'' | |||
|
1 | 1 | """Test suite for our zeromq-based messaging specification. |
|
2 | 2 | """ |
|
3 | 3 | #----------------------------------------------------------------------------- |
|
4 | 4 | # Copyright (C) 2010-2011 The IPython Development Team |
|
5 | 5 | # |
|
6 | 6 | # Distributed under the terms of the BSD License. The full license is in |
|
7 | 7 | # the file COPYING.txt, distributed as part of this software. |
|
8 | 8 | #----------------------------------------------------------------------------- |
|
9 | 9 | |
|
10 | 10 | import re |
|
11 | 11 | import sys |
|
12 | 12 | import time |
|
13 | 13 | from subprocess import PIPE |
|
14 | 14 | from Queue import Empty |
|
15 | 15 | |
|
16 | 16 | import nose.tools as nt |
|
17 | 17 | |
|
18 | 18 | from IPython.kernel import KernelManager |
|
19 | 19 | |
|
20 | 20 | |
|
21 | 21 | from IPython.testing import decorators as dec |
|
22 | 22 | from IPython.utils import io |
|
23 | 23 | from IPython.utils.traitlets import ( |
|
24 | 24 | HasTraits, TraitError, Bool, Unicode, Dict, Integer, List, Enum, Any, |
|
25 | 25 | ) |
|
26 | 26 | |
|
27 | 27 | #----------------------------------------------------------------------------- |
|
28 | 28 | # Global setup and utilities |
|
29 | 29 | #----------------------------------------------------------------------------- |
|
30 | 30 | |
|
31 | 31 | def setup(): |
|
32 | 32 | global KM, KC |
|
33 | 33 | KM = KernelManager() |
|
34 | 34 | KM.start_kernel(stdout=PIPE, stderr=PIPE) |
|
35 | 35 | KC = KM.client() |
|
36 | 36 | KC.start_channels() |
|
37 | 37 | |
|
38 | 38 | # wait for kernel to be ready |
|
39 | 39 | KC.execute("pass") |
|
40 | 40 | KC.get_shell_msg(block=True, timeout=5) |
|
41 | 41 | flush_channels() |
|
42 | 42 | |
|
43 | 43 | |
|
44 | 44 | def teardown(): |
|
45 | 45 | KC.stop_channels() |
|
46 | 46 | KM.shutdown_kernel() |
|
47 | 47 | |
|
48 | 48 | |
|
49 | 49 | def flush_channels(kc=None): |
|
50 | 50 | """flush any messages waiting on the queue""" |
|
51 | 51 | if kc is None: |
|
52 | 52 | kc = KC |
|
53 | 53 | for channel in (kc.shell_channel, kc.iopub_channel): |
|
54 | 54 | while True: |
|
55 | 55 | try: |
|
56 | 56 | msg = channel.get_msg(block=True, timeout=0.1) |
|
57 | 57 | except Empty: |
|
58 | 58 | break |
|
59 | 59 | else: |
|
60 | 60 | list(validate_message(msg)) |
|
61 | 61 | |
|
62 | 62 | |
|
63 | 63 | def execute(code='', kc=None, **kwargs): |
|
64 | 64 | """wrapper for doing common steps for validating an execution request""" |
|
65 | 65 | msg_id = KC.execute(code=code, **kwargs) |
|
66 | 66 | reply = KC.get_shell_msg(timeout=2) |
|
67 | 67 | list(validate_message(reply, 'execute_reply', msg_id)) |
|
68 | 68 | busy = KC.get_iopub_msg(timeout=2) |
|
69 | 69 | list(validate_message(busy, 'status', msg_id)) |
|
70 | 70 | nt.assert_equal(busy['content']['execution_state'], 'busy') |
|
71 | 71 | |
|
72 | 72 | if not kwargs.get('silent'): |
|
73 | 73 | pyin = KC.get_iopub_msg(timeout=2) |
|
74 | 74 | list(validate_message(pyin, 'pyin', msg_id)) |
|
75 | 75 | nt.assert_equal(pyin['content']['code'], code) |
|
76 | 76 | |
|
77 | 77 | return msg_id, reply['content'] |
|
78 | 78 | |
|
79 | 79 | #----------------------------------------------------------------------------- |
|
80 | 80 | # MSG Spec References |
|
81 | 81 | #----------------------------------------------------------------------------- |
|
82 | 82 | |
|
83 | 83 | |
|
84 | 84 | class Reference(HasTraits): |
|
85 | 85 | |
|
86 | 86 | """ |
|
87 | 87 | Base class for message spec specification testing. |
|
88 | 88 | |
|
89 | 89 | This class is the core of the message specification test. The |
|
90 | 90 | idea is that child classes implement trait attributes for each |
|
91 | 91 | message keys, so that message keys can be tested against these |
|
92 | 92 | traits using :meth:`check` method. |
|
93 | 93 | |
|
94 | 94 | """ |
|
95 | 95 | |
|
96 | 96 | def check(self, d): |
|
97 | 97 | """validate a dict against our traits""" |
|
98 | 98 | for key in self.trait_names(): |
|
99 | 99 | yield nt.assert_true(key in d, "Missing key: %r, should be found in %s" % (key, d)) |
|
100 | 100 | # FIXME: always allow None, probably not a good idea |
|
101 | 101 | if d[key] is None: |
|
102 | 102 | continue |
|
103 | 103 | try: |
|
104 | 104 | setattr(self, key, d[key]) |
|
105 | 105 | except TraitError as e: |
|
106 | 106 | yield nt.assert_true(False, str(e)) |
|
107 | 107 | |
|
108 | 108 | |
|
109 | 109 | class RMessage(Reference): |
|
110 | 110 | msg_id = Unicode() |
|
111 | 111 | msg_type = Unicode() |
|
112 | 112 | header = Dict() |
|
113 | 113 | parent_header = Dict() |
|
114 | 114 | content = Dict() |
|
115 | 115 | |
|
116 | 116 | class RHeader(Reference): |
|
117 | 117 | msg_id = Unicode() |
|
118 | 118 | msg_type = Unicode() |
|
119 | 119 | session = Unicode() |
|
120 | 120 | username = Unicode() |
|
121 | 121 | |
|
122 | 122 | class RContent(Reference): |
|
123 | 123 | status = Enum((u'ok', u'error')) |
|
124 | 124 | |
|
125 | 125 | |
|
126 | 126 | class ExecuteReply(Reference): |
|
127 | 127 | execution_count = Integer() |
|
128 | 128 | status = Enum((u'ok', u'error')) |
|
129 | 129 | |
|
130 | 130 | def check(self, d): |
|
131 | 131 | for tst in Reference.check(self, d): |
|
132 | 132 | yield tst |
|
133 | 133 | if d['status'] == 'ok': |
|
134 | 134 | for tst in ExecuteReplyOkay().check(d): |
|
135 | 135 | yield tst |
|
136 | 136 | elif d['status'] == 'error': |
|
137 | 137 | for tst in ExecuteReplyError().check(d): |
|
138 | 138 | yield tst |
|
139 | 139 | |
|
140 | 140 | |
|
141 | 141 | class ExecuteReplyOkay(Reference): |
|
142 | 142 | payload = List(Dict) |
|
143 | 143 | user_variables = Dict() |
|
144 | 144 | user_expressions = Dict() |
|
145 | 145 | |
|
146 | 146 | |
|
147 | 147 | class ExecuteReplyError(Reference): |
|
148 | 148 | ename = Unicode() |
|
149 | 149 | evalue = Unicode() |
|
150 | 150 | traceback = List(Unicode) |
|
151 | 151 | |
|
152 | 152 | |
|
153 | 153 | class OInfoReply(Reference): |
|
154 | 154 | name = Unicode() |
|
155 | 155 | found = Bool() |
|
156 | 156 | ismagic = Bool() |
|
157 | 157 | isalias = Bool() |
|
158 | 158 | namespace = Enum((u'builtin', u'magics', u'alias', u'Interactive')) |
|
159 | 159 | type_name = Unicode() |
|
160 | 160 | string_form = Unicode() |
|
161 | 161 | base_class = Unicode() |
|
162 | 162 | length = Integer() |
|
163 | 163 | file = Unicode() |
|
164 | 164 | definition = Unicode() |
|
165 | 165 | argspec = Dict() |
|
166 | 166 | init_definition = Unicode() |
|
167 | 167 | docstring = Unicode() |
|
168 | 168 | init_docstring = Unicode() |
|
169 | 169 | class_docstring = Unicode() |
|
170 | 170 | call_def = Unicode() |
|
171 | 171 | call_docstring = Unicode() |
|
172 | 172 | source = Unicode() |
|
173 | 173 | |
|
174 | 174 | def check(self, d): |
|
175 | 175 | for tst in Reference.check(self, d): |
|
176 | 176 | yield tst |
|
177 | 177 | if d['argspec'] is not None: |
|
178 | 178 | for tst in ArgSpec().check(d['argspec']): |
|
179 | 179 | yield tst |
|
180 | 180 | |
|
181 | 181 | |
|
182 | 182 | class ArgSpec(Reference): |
|
183 | 183 | args = List(Unicode) |
|
184 | 184 | varargs = Unicode() |
|
185 | 185 | varkw = Unicode() |
|
186 | 186 | defaults = List() |
|
187 | 187 | |
|
188 | 188 | |
|
189 | 189 | class Status(Reference): |
|
190 | 190 | execution_state = Enum((u'busy', u'idle', u'starting')) |
|
191 | 191 | |
|
192 | 192 | |
|
193 | 193 | class CompleteReply(Reference): |
|
194 | 194 | matches = List(Unicode) |
|
195 | 195 | |
|
196 | 196 | |
|
197 | 197 | def Version(num, trait=Integer): |
|
198 | 198 | return List(trait, default_value=[0] * num, minlen=num, maxlen=num) |
|
199 | 199 | |
|
200 | 200 | |
|
201 | 201 | class KernelInfoReply(Reference): |
|
202 | 202 | |
|
203 | 203 | protocol_version = Version(2) |
|
204 | 204 | ipython_version = Version(4, Any) |
|
205 | 205 | language_version = Version(3) |
|
206 | 206 | language = Unicode() |
|
207 | 207 | |
|
208 | 208 | def _ipython_version_changed(self, name, old, new): |
|
209 | 209 | for v in new: |
|
210 | 210 | nt.assert_true( |
|
211 | 211 | isinstance(v, int) or isinstance(v, basestring), |
|
212 | 212 | 'expected int or string as version component, got {0!r}' |
|
213 | 213 | .format(v)) |
|
214 | 214 | |
|
215 | 215 | |
|
216 | 216 | # IOPub messages |
|
217 | 217 | |
|
218 | 218 | class PyIn(Reference): |
|
219 | 219 | code = Unicode() |
|
220 | 220 | execution_count = Integer() |
|
221 | 221 | |
|
222 | 222 | |
|
223 | 223 | PyErr = ExecuteReplyError |
|
224 | 224 | |
|
225 | 225 | |
|
226 | 226 | class Stream(Reference): |
|
227 | 227 | name = Enum((u'stdout', u'stderr')) |
|
228 | 228 | data = Unicode() |
|
229 | 229 | |
|
230 | 230 | |
|
231 | 231 | mime_pat = re.compile(r'\w+/\w+') |
|
232 | 232 | |
|
233 | 233 | class DisplayData(Reference): |
|
234 | 234 | source = Unicode() |
|
235 | 235 | metadata = Dict() |
|
236 | 236 | data = Dict() |
|
237 | 237 | def _data_changed(self, name, old, new): |
|
238 | 238 | for k,v in new.iteritems(): |
|
239 | 239 | nt.assert_true(mime_pat.match(k)) |
|
240 | 240 | nt.assert_true(isinstance(v, basestring), "expected string data, got %r" % v) |
|
241 | 241 | |
|
242 | 242 | |
|
243 | 243 | class PyOut(Reference): |
|
244 | 244 | execution_count = Integer() |
|
245 | 245 | data = Dict() |
|
246 | 246 | def _data_changed(self, name, old, new): |
|
247 | 247 | for k,v in new.iteritems(): |
|
248 | 248 | nt.assert_true(mime_pat.match(k)) |
|
249 | 249 | nt.assert_true(isinstance(v, basestring), "expected string data, got %r" % v) |
|
250 | 250 | |
|
251 | 251 | |
|
252 | 252 | references = { |
|
253 | 253 | 'execute_reply' : ExecuteReply(), |
|
254 | 254 | 'object_info_reply' : OInfoReply(), |
|
255 | 255 | 'status' : Status(), |
|
256 | 256 | 'complete_reply' : CompleteReply(), |
|
257 | 257 | 'kernel_info_reply': KernelInfoReply(), |
|
258 | 258 | 'pyin' : PyIn(), |
|
259 | 259 | 'pyout' : PyOut(), |
|
260 | 260 | 'pyerr' : PyErr(), |
|
261 | 261 | 'stream' : Stream(), |
|
262 | 262 | 'display_data' : DisplayData(), |
|
263 | 263 | } |
|
264 | 264 | """ |
|
265 | 265 | Specifications of `content` part of the reply messages. |
|
266 | 266 | """ |
|
267 | 267 | |
|
268 | 268 | |
|
269 | 269 | def validate_message(msg, msg_type=None, parent=None): |
|
270 | 270 | """validate a message |
|
271 | 271 | |
|
272 | 272 | This is a generator, and must be iterated through to actually |
|
273 | 273 | trigger each test. |
|
274 | 274 | |
|
275 | 275 | If msg_type and/or parent are given, the msg_type and/or parent msg_id |
|
276 | 276 | are compared with the given values. |
|
277 | 277 | """ |
|
278 | 278 | RMessage().check(msg) |
|
279 | 279 | if msg_type: |
|
280 | 280 | yield nt.assert_equal(msg['msg_type'], msg_type) |
|
281 | 281 | if parent: |
|
282 | 282 | yield nt.assert_equal(msg['parent_header']['msg_id'], parent) |
|
283 | 283 | content = msg['content'] |
|
284 | 284 | ref = references[msg['msg_type']] |
|
285 | 285 | for tst in ref.check(content): |
|
286 | 286 | yield tst |
|
287 | 287 | |
|
288 | 288 | |
|
289 | 289 | #----------------------------------------------------------------------------- |
|
290 | 290 | # Tests |
|
291 | 291 | #----------------------------------------------------------------------------- |
|
292 | 292 | |
|
293 | 293 | # Shell channel |
|
294 | 294 | |
|
295 | 295 | @dec.parametric |
|
296 | 296 | def test_execute(): |
|
297 | 297 | flush_channels() |
|
298 | 298 | |
|
299 | 299 | msg_id = KC.execute(code='x=1') |
|
300 | 300 | reply = KC.get_shell_msg(timeout=2) |
|
301 | 301 | for tst in validate_message(reply, 'execute_reply', msg_id): |
|
302 | 302 | yield tst |
|
303 | 303 | |
|
304 | 304 | |
|
305 | 305 | @dec.parametric |
|
306 | 306 | def test_execute_silent(): |
|
307 | 307 | flush_channels() |
|
308 | 308 | msg_id, reply = execute(code='x=1', silent=True) |
|
309 | 309 | |
|
310 | 310 | # flush status=idle |
|
311 | 311 | status = KC.iopub_channel.get_msg(timeout=2) |
|
312 | 312 | for tst in validate_message(status, 'status', msg_id): |
|
313 | 313 | yield tst |
|
314 | 314 | nt.assert_equal(status['content']['execution_state'], 'idle') |
|
315 | 315 | |
|
316 | 316 | yield nt.assert_raises(Empty, KC.iopub_channel.get_msg, timeout=0.1) |
|
317 | 317 | count = reply['execution_count'] |
|
318 | 318 | |
|
319 | 319 | msg_id, reply = execute(code='x=2', silent=True) |
|
320 | 320 | |
|
321 | 321 | # flush status=idle |
|
322 | 322 | status = KC.iopub_channel.get_msg(timeout=2) |
|
323 | 323 | for tst in validate_message(status, 'status', msg_id): |
|
324 | 324 | yield tst |
|
325 | 325 | yield nt.assert_equal(status['content']['execution_state'], 'idle') |
|
326 | 326 | |
|
327 | 327 | yield nt.assert_raises(Empty, KC.iopub_channel.get_msg, timeout=0.1) |
|
328 | 328 | count_2 = reply['execution_count'] |
|
329 | 329 | yield nt.assert_equal(count_2, count) |
|
330 | 330 | |
|
331 | 331 | |
|
332 | 332 | @dec.parametric |
|
333 | 333 | def test_execute_error(): |
|
334 | 334 | flush_channels() |
|
335 | 335 | |
|
336 | 336 | msg_id, reply = execute(code='1/0') |
|
337 | 337 | yield nt.assert_equal(reply['status'], 'error') |
|
338 | 338 | yield nt.assert_equal(reply['ename'], 'ZeroDivisionError') |
|
339 | 339 | |
|
340 | 340 | pyerr = KC.iopub_channel.get_msg(timeout=2) |
|
341 | 341 | for tst in validate_message(pyerr, 'pyerr', msg_id): |
|
342 | 342 | yield tst |
|
343 | 343 | |
|
344 | 344 | |
|
345 | 345 | def test_execute_inc(): |
|
346 | 346 | """execute request should increment execution_count""" |
|
347 | 347 | flush_channels() |
|
348 | 348 | |
|
349 | 349 | msg_id, reply = execute(code='x=1') |
|
350 | 350 | count = reply['execution_count'] |
|
351 | 351 | |
|
352 | 352 | flush_channels() |
|
353 | 353 | |
|
354 | 354 | msg_id, reply = execute(code='x=2') |
|
355 | 355 | count_2 = reply['execution_count'] |
|
356 | 356 | nt.assert_equal(count_2, count+1) |
|
357 | 357 | |
|
358 | 358 | |
|
359 | 359 | def test_user_variables(): |
|
360 | 360 | flush_channels() |
|
361 | 361 | |
|
362 | 362 | msg_id, reply = execute(code='x=1', user_variables=['x']) |
|
363 | 363 | user_variables = reply['user_variables'] |
|
364 |
nt.assert_equal(user_variables, {u'x' |
|
|
364 | nt.assert_equal(user_variables, {u'x': { | |
|
365 | u'status': u'ok', | |
|
366 | u'data': {u'text/plain': u'1'}, | |
|
367 | u'metadata': {}, | |
|
368 | }}) | |
|
369 | ||
|
370 | ||
|
371 | def test_user_variables_fail(): | |
|
372 | flush_channels() | |
|
373 | ||
|
374 | msg_id, reply = execute(code='x=1', user_variables=['nosuchname']) | |
|
375 | user_variables = reply['user_variables'] | |
|
376 | foo = user_variables['nosuchname'] | |
|
377 | nt.assert_equal(foo['status'], 'error') | |
|
378 | nt.assert_equal(foo['ename'], 'KeyError') | |
|
365 | 379 | |
|
366 | 380 | |
|
367 | 381 | def test_user_expressions(): |
|
368 | 382 | flush_channels() |
|
369 | 383 | |
|
370 | 384 | msg_id, reply = execute(code='x=1', user_expressions=dict(foo='x+1')) |
|
371 | 385 | user_expressions = reply['user_expressions'] |
|
372 |
nt.assert_equal(user_expressions, {u'foo' |
|
|
386 | nt.assert_equal(user_expressions, {u'foo': { | |
|
387 | u'status': u'ok', | |
|
388 | u'data': {u'text/plain': u'2'}, | |
|
389 | u'metadata': {}, | |
|
390 | }}) | |
|
391 | ||
|
392 | ||
|
393 | def test_user_expressions_fail(): | |
|
394 | flush_channels() | |
|
395 | ||
|
396 | msg_id, reply = execute(code='x=0', user_expressions=dict(foo='nosuchname')) | |
|
397 | user_expressions = reply['user_expressions'] | |
|
398 | foo = user_expressions['foo'] | |
|
399 | nt.assert_equal(foo['status'], 'error') | |
|
400 | nt.assert_equal(foo['ename'], 'NameError') | |
|
373 | 401 | |
|
374 | 402 | |
|
375 | 403 | @dec.parametric |
|
376 | 404 | def test_oinfo(): |
|
377 | 405 | flush_channels() |
|
378 | 406 | |
|
379 | 407 | msg_id = KC.object_info('a') |
|
380 | 408 | reply = KC.get_shell_msg(timeout=2) |
|
381 | 409 | for tst in validate_message(reply, 'object_info_reply', msg_id): |
|
382 | 410 | yield tst |
|
383 | 411 | |
|
384 | 412 | |
|
385 | 413 | @dec.parametric |
|
386 | 414 | def test_oinfo_found(): |
|
387 | 415 | flush_channels() |
|
388 | 416 | |
|
389 | 417 | msg_id, reply = execute(code='a=5') |
|
390 | 418 | |
|
391 | 419 | msg_id = KC.object_info('a') |
|
392 | 420 | reply = KC.get_shell_msg(timeout=2) |
|
393 | 421 | for tst in validate_message(reply, 'object_info_reply', msg_id): |
|
394 | 422 | yield tst |
|
395 | 423 | content = reply['content'] |
|
396 | 424 | yield nt.assert_true(content['found']) |
|
397 | 425 | argspec = content['argspec'] |
|
398 | 426 | yield nt.assert_true(argspec is None, "didn't expect argspec dict, got %r" % argspec) |
|
399 | 427 | |
|
400 | 428 | |
|
401 | 429 | @dec.parametric |
|
402 | 430 | def test_oinfo_detail(): |
|
403 | 431 | flush_channels() |
|
404 | 432 | |
|
405 | 433 | msg_id, reply = execute(code='ip=get_ipython()') |
|
406 | 434 | |
|
407 | 435 | msg_id = KC.object_info('ip.object_inspect', detail_level=2) |
|
408 | 436 | reply = KC.get_shell_msg(timeout=2) |
|
409 | 437 | for tst in validate_message(reply, 'object_info_reply', msg_id): |
|
410 | 438 | yield tst |
|
411 | 439 | content = reply['content'] |
|
412 | 440 | yield nt.assert_true(content['found']) |
|
413 | 441 | argspec = content['argspec'] |
|
414 | 442 | yield nt.assert_true(isinstance(argspec, dict), "expected non-empty argspec dict, got %r" % argspec) |
|
415 | 443 | yield nt.assert_equal(argspec['defaults'], [0]) |
|
416 | 444 | |
|
417 | 445 | |
|
418 | 446 | @dec.parametric |
|
419 | 447 | def test_oinfo_not_found(): |
|
420 | 448 | flush_channels() |
|
421 | 449 | |
|
422 | 450 | msg_id = KC.object_info('dne') |
|
423 | 451 | reply = KC.get_shell_msg(timeout=2) |
|
424 | 452 | for tst in validate_message(reply, 'object_info_reply', msg_id): |
|
425 | 453 | yield tst |
|
426 | 454 | content = reply['content'] |
|
427 | 455 | yield nt.assert_false(content['found']) |
|
428 | 456 | |
|
429 | 457 | |
|
430 | 458 | @dec.parametric |
|
431 | 459 | def test_complete(): |
|
432 | 460 | flush_channels() |
|
433 | 461 | |
|
434 | 462 | msg_id, reply = execute(code="alpha = albert = 5") |
|
435 | 463 | |
|
436 | 464 | msg_id = KC.complete('al', 'al', 2) |
|
437 | 465 | reply = KC.get_shell_msg(timeout=2) |
|
438 | 466 | for tst in validate_message(reply, 'complete_reply', msg_id): |
|
439 | 467 | yield tst |
|
440 | 468 | matches = reply['content']['matches'] |
|
441 | 469 | for name in ('alpha', 'albert'): |
|
442 | 470 | yield nt.assert_true(name in matches, "Missing match: %r" % name) |
|
443 | 471 | |
|
444 | 472 | |
|
445 | 473 | @dec.parametric |
|
446 | 474 | def test_kernel_info_request(): |
|
447 | 475 | flush_channels() |
|
448 | 476 | |
|
449 | 477 | msg_id = KC.kernel_info() |
|
450 | 478 | reply = KC.get_shell_msg(timeout=2) |
|
451 | 479 | for tst in validate_message(reply, 'kernel_info_reply', msg_id): |
|
452 | 480 | yield tst |
|
453 | 481 | |
|
454 | 482 | |
|
455 | 483 | # IOPub channel |
|
456 | 484 | |
|
457 | 485 | |
|
458 | 486 | @dec.parametric |
|
459 | 487 | def test_stream(): |
|
460 | 488 | flush_channels() |
|
461 | 489 | |
|
462 | 490 | msg_id, reply = execute("print('hi')") |
|
463 | 491 | |
|
464 | 492 | stdout = KC.iopub_channel.get_msg(timeout=2) |
|
465 | 493 | for tst in validate_message(stdout, 'stream', msg_id): |
|
466 | 494 | yield tst |
|
467 | 495 | content = stdout['content'] |
|
468 | 496 | yield nt.assert_equal(content['name'], u'stdout') |
|
469 | 497 | yield nt.assert_equal(content['data'], u'hi\n') |
|
470 | 498 | |
|
471 | 499 | |
|
472 | 500 | @dec.parametric |
|
473 | 501 | def test_display_data(): |
|
474 | 502 | flush_channels() |
|
475 | 503 | |
|
476 | 504 | msg_id, reply = execute("from IPython.core.display import display; display(1)") |
|
477 | 505 | |
|
478 | 506 | display = KC.iopub_channel.get_msg(timeout=2) |
|
479 | 507 | for tst in validate_message(display, 'display_data', parent=msg_id): |
|
480 | 508 | yield tst |
|
481 | 509 | data = display['content']['data'] |
|
482 | 510 | yield nt.assert_equal(data['text/plain'], u'1') |
|
483 | 511 |
@@ -1,618 +1,597 b'' | |||
|
1 | 1 | """A ZMQ-based subclass of InteractiveShell. |
|
2 | 2 | |
|
3 | 3 | This code is meant to ease the refactoring of the base InteractiveShell into |
|
4 | 4 | something with a cleaner architecture for 2-process use, without actually |
|
5 | 5 | breaking InteractiveShell itself. So we're doing something a bit ugly, where |
|
6 | 6 | we subclass and override what we want to fix. Once this is working well, we |
|
7 | 7 | can go back to the base class and refactor the code for a cleaner inheritance |
|
8 | 8 | implementation that doesn't rely on so much monkeypatching. |
|
9 | 9 | |
|
10 | 10 | But this lets us maintain a fully working IPython as we develop the new |
|
11 | 11 | machinery. This should thus be thought of as scaffolding. |
|
12 | 12 | """ |
|
13 | 13 | #----------------------------------------------------------------------------- |
|
14 | 14 | # Imports |
|
15 | 15 | #----------------------------------------------------------------------------- |
|
16 | 16 | from __future__ import print_function |
|
17 | 17 | |
|
18 | 18 | # Stdlib |
|
19 | 19 | import os |
|
20 | 20 | import sys |
|
21 | 21 | import time |
|
22 | 22 | |
|
23 | 23 | # System library imports |
|
24 | 24 | from zmq.eventloop import ioloop |
|
25 | 25 | |
|
26 | 26 | # Our own |
|
27 | 27 | from IPython.core.interactiveshell import ( |
|
28 | 28 | InteractiveShell, InteractiveShellABC |
|
29 | 29 | ) |
|
30 | 30 | from IPython.core import page |
|
31 | 31 | from IPython.core.autocall import ZMQExitAutocall |
|
32 | 32 | from IPython.core.displaypub import DisplayPublisher |
|
33 | 33 | from IPython.core.error import UsageError |
|
34 | 34 | from IPython.core.magics import MacroToEdit, CodeMagics |
|
35 | 35 | from IPython.core.magic import magics_class, line_magic, Magics |
|
36 | 36 | from IPython.core.payloadpage import install_payload_page |
|
37 | 37 | from IPython.display import display, Javascript |
|
38 | 38 | from IPython.kernel.inprocess.socket import SocketABC |
|
39 | 39 | from IPython.kernel import ( |
|
40 | 40 | get_connection_file, get_connection_info, connect_qtconsole |
|
41 | 41 | ) |
|
42 | 42 | from IPython.testing.skipdoctest import skip_doctest |
|
43 | 43 | from IPython.utils import io, openpy |
|
44 | 44 | from IPython.utils.jsonutil import json_clean, encode_images |
|
45 | 45 | from IPython.utils.process import arg_split |
|
46 | 46 | from IPython.utils import py3compat |
|
47 | 47 | from IPython.utils.traitlets import Instance, Type, Dict, CBool, CBytes |
|
48 | 48 | from IPython.utils.warn import warn, error |
|
49 | 49 | from IPython.kernel.zmq.displayhook import ZMQShellDisplayHook |
|
50 | 50 | from IPython.kernel.zmq.datapub import ZMQDataPublisher |
|
51 | 51 | from IPython.kernel.zmq.session import extract_header |
|
52 | 52 | from session import Session |
|
53 | 53 | |
|
54 | 54 | #----------------------------------------------------------------------------- |
|
55 | 55 | # Functions and classes |
|
56 | 56 | #----------------------------------------------------------------------------- |
|
57 | 57 | |
|
58 | 58 | class ZMQDisplayPublisher(DisplayPublisher): |
|
59 | 59 | """A display publisher that publishes data using a ZeroMQ PUB socket.""" |
|
60 | 60 | |
|
61 | 61 | session = Instance(Session) |
|
62 | 62 | pub_socket = Instance(SocketABC) |
|
63 | 63 | parent_header = Dict({}) |
|
64 | 64 | topic = CBytes(b'displaypub') |
|
65 | 65 | |
|
66 | 66 | def set_parent(self, parent): |
|
67 | 67 | """Set the parent for outbound messages.""" |
|
68 | 68 | self.parent_header = extract_header(parent) |
|
69 | 69 | |
|
70 | 70 | def _flush_streams(self): |
|
71 | 71 | """flush IO Streams prior to display""" |
|
72 | 72 | sys.stdout.flush() |
|
73 | 73 | sys.stderr.flush() |
|
74 | 74 | |
|
75 | 75 | def publish(self, source, data, metadata=None): |
|
76 | 76 | self._flush_streams() |
|
77 | 77 | if metadata is None: |
|
78 | 78 | metadata = {} |
|
79 | 79 | self._validate_data(source, data, metadata) |
|
80 | 80 | content = {} |
|
81 | 81 | content['source'] = source |
|
82 | 82 | content['data'] = encode_images(data) |
|
83 | 83 | content['metadata'] = metadata |
|
84 | 84 | self.session.send( |
|
85 | 85 | self.pub_socket, u'display_data', json_clean(content), |
|
86 | 86 | parent=self.parent_header, ident=self.topic, |
|
87 | 87 | ) |
|
88 | 88 | |
|
89 | 89 | def clear_output(self, stdout=True, stderr=True, other=True): |
|
90 | 90 | content = dict(stdout=stdout, stderr=stderr, other=other) |
|
91 | 91 | |
|
92 | 92 | if stdout: |
|
93 | 93 | print('\r', file=sys.stdout, end='') |
|
94 | 94 | if stderr: |
|
95 | 95 | print('\r', file=sys.stderr, end='') |
|
96 | 96 | |
|
97 | 97 | self._flush_streams() |
|
98 | 98 | |
|
99 | 99 | self.session.send( |
|
100 | 100 | self.pub_socket, u'clear_output', content, |
|
101 | 101 | parent=self.parent_header, ident=self.topic, |
|
102 | 102 | ) |
|
103 | 103 | |
|
104 | 104 | @magics_class |
|
105 | 105 | class KernelMagics(Magics): |
|
106 | 106 | #------------------------------------------------------------------------ |
|
107 | 107 | # Magic overrides |
|
108 | 108 | #------------------------------------------------------------------------ |
|
109 | 109 | # Once the base class stops inheriting from magic, this code needs to be |
|
110 | 110 | # moved into a separate machinery as well. For now, at least isolate here |
|
111 | 111 | # the magics which this class needs to implement differently from the base |
|
112 | 112 | # class, or that are unique to it. |
|
113 | 113 | |
|
114 | 114 | @line_magic |
|
115 | 115 | def doctest_mode(self, parameter_s=''): |
|
116 | 116 | """Toggle doctest mode on and off. |
|
117 | 117 | |
|
118 | 118 | This mode is intended to make IPython behave as much as possible like a |
|
119 | 119 | plain Python shell, from the perspective of how its prompts, exceptions |
|
120 | 120 | and output look. This makes it easy to copy and paste parts of a |
|
121 | 121 | session into doctests. It does so by: |
|
122 | 122 | |
|
123 | 123 | - Changing the prompts to the classic ``>>>`` ones. |
|
124 | 124 | - Changing the exception reporting mode to 'Plain'. |
|
125 | 125 | - Disabling pretty-printing of output. |
|
126 | 126 | |
|
127 | 127 | Note that IPython also supports the pasting of code snippets that have |
|
128 | 128 | leading '>>>' and '...' prompts in them. This means that you can paste |
|
129 | 129 | doctests from files or docstrings (even if they have leading |
|
130 | 130 | whitespace), and the code will execute correctly. You can then use |
|
131 | 131 | '%history -t' to see the translated history; this will give you the |
|
132 | 132 | input after removal of all the leading prompts and whitespace, which |
|
133 | 133 | can be pasted back into an editor. |
|
134 | 134 | |
|
135 | 135 | With these features, you can switch into this mode easily whenever you |
|
136 | 136 | need to do testing and changes to doctests, without having to leave |
|
137 | 137 | your existing IPython session. |
|
138 | 138 | """ |
|
139 | 139 | |
|
140 | 140 | from IPython.utils.ipstruct import Struct |
|
141 | 141 | |
|
142 | 142 | # Shorthands |
|
143 | 143 | shell = self.shell |
|
144 | 144 | disp_formatter = self.shell.display_formatter |
|
145 | 145 | ptformatter = disp_formatter.formatters['text/plain'] |
|
146 | 146 | # dstore is a data store kept in the instance metadata bag to track any |
|
147 | 147 | # changes we make, so we can undo them later. |
|
148 | 148 | dstore = shell.meta.setdefault('doctest_mode', Struct()) |
|
149 | 149 | save_dstore = dstore.setdefault |
|
150 | 150 | |
|
151 | 151 | # save a few values we'll need to recover later |
|
152 | 152 | mode = save_dstore('mode', False) |
|
153 | 153 | save_dstore('rc_pprint', ptformatter.pprint) |
|
154 | 154 | save_dstore('rc_active_types',disp_formatter.active_types) |
|
155 | 155 | save_dstore('xmode', shell.InteractiveTB.mode) |
|
156 | 156 | |
|
157 | 157 | if mode == False: |
|
158 | 158 | # turn on |
|
159 | 159 | ptformatter.pprint = False |
|
160 | 160 | disp_formatter.active_types = ['text/plain'] |
|
161 | 161 | shell.magic('xmode Plain') |
|
162 | 162 | else: |
|
163 | 163 | # turn off |
|
164 | 164 | ptformatter.pprint = dstore.rc_pprint |
|
165 | 165 | disp_formatter.active_types = dstore.rc_active_types |
|
166 | 166 | shell.magic("xmode " + dstore.xmode) |
|
167 | 167 | |
|
168 | 168 | # Store new mode and inform on console |
|
169 | 169 | dstore.mode = bool(1-int(mode)) |
|
170 | 170 | mode_label = ['OFF','ON'][dstore.mode] |
|
171 | 171 | print('Doctest mode is:', mode_label) |
|
172 | 172 | |
|
173 | 173 | # Send the payload back so that clients can modify their prompt display |
|
174 | 174 | payload = dict( |
|
175 | 175 | source='IPython.kernel.zmq.zmqshell.ZMQInteractiveShell.doctest_mode', |
|
176 | 176 | mode=dstore.mode) |
|
177 | 177 | shell.payload_manager.write_payload(payload) |
|
178 | 178 | |
|
179 | 179 | |
|
180 | 180 | _find_edit_target = CodeMagics._find_edit_target |
|
181 | 181 | |
|
182 | 182 | @skip_doctest |
|
183 | 183 | @line_magic |
|
184 | 184 | def edit(self, parameter_s='', last_call=['','']): |
|
185 | 185 | """Bring up an editor and execute the resulting code. |
|
186 | 186 | |
|
187 | 187 | Usage: |
|
188 | 188 | %edit [options] [args] |
|
189 | 189 | |
|
190 | 190 | %edit runs an external text editor. You will need to set the command for |
|
191 | 191 | this editor via the ``TerminalInteractiveShell.editor`` option in your |
|
192 | 192 | configuration file before it will work. |
|
193 | 193 | |
|
194 | 194 | This command allows you to conveniently edit multi-line code right in |
|
195 | 195 | your IPython session. |
|
196 | 196 | |
|
197 | 197 | If called without arguments, %edit opens up an empty editor with a |
|
198 | 198 | temporary file and will execute the contents of this file when you |
|
199 | 199 | close it (don't forget to save it!). |
|
200 | 200 | |
|
201 | 201 | |
|
202 | 202 | Options: |
|
203 | 203 | |
|
204 | 204 | -n <number>: open the editor at a specified line number. By default, |
|
205 | 205 | the IPython editor hook uses the unix syntax 'editor +N filename', but |
|
206 | 206 | you can configure this by providing your own modified hook if your |
|
207 | 207 | favorite editor supports line-number specifications with a different |
|
208 | 208 | syntax. |
|
209 | 209 | |
|
210 | 210 | -p: this will call the editor with the same data as the previous time |
|
211 | 211 | it was used, regardless of how long ago (in your current session) it |
|
212 | 212 | was. |
|
213 | 213 | |
|
214 | 214 | -r: use 'raw' input. This option only applies to input taken from the |
|
215 | 215 | user's history. By default, the 'processed' history is used, so that |
|
216 | 216 | magics are loaded in their transformed version to valid Python. If |
|
217 | 217 | this option is given, the raw input as typed as the command line is |
|
218 | 218 | used instead. When you exit the editor, it will be executed by |
|
219 | 219 | IPython's own processor. |
|
220 | 220 | |
|
221 | 221 | -x: do not execute the edited code immediately upon exit. This is |
|
222 | 222 | mainly useful if you are editing programs which need to be called with |
|
223 | 223 | command line arguments, which you can then do using %run. |
|
224 | 224 | |
|
225 | 225 | |
|
226 | 226 | Arguments: |
|
227 | 227 | |
|
228 | 228 | If arguments are given, the following possibilites exist: |
|
229 | 229 | |
|
230 | 230 | - The arguments are numbers or pairs of colon-separated numbers (like |
|
231 | 231 | 1 4:8 9). These are interpreted as lines of previous input to be |
|
232 | 232 | loaded into the editor. The syntax is the same of the %macro command. |
|
233 | 233 | |
|
234 | 234 | - If the argument doesn't start with a number, it is evaluated as a |
|
235 | 235 | variable and its contents loaded into the editor. You can thus edit |
|
236 | 236 | any string which contains python code (including the result of |
|
237 | 237 | previous edits). |
|
238 | 238 | |
|
239 | 239 | - If the argument is the name of an object (other than a string), |
|
240 | 240 | IPython will try to locate the file where it was defined and open the |
|
241 | 241 | editor at the point where it is defined. You can use `%edit function` |
|
242 | 242 | to load an editor exactly at the point where 'function' is defined, |
|
243 | 243 | edit it and have the file be executed automatically. |
|
244 | 244 | |
|
245 | 245 | If the object is a macro (see %macro for details), this opens up your |
|
246 | 246 | specified editor with a temporary file containing the macro's data. |
|
247 | 247 | Upon exit, the macro is reloaded with the contents of the file. |
|
248 | 248 | |
|
249 | 249 | Note: opening at an exact line is only supported under Unix, and some |
|
250 | 250 | editors (like kedit and gedit up to Gnome 2.8) do not understand the |
|
251 | 251 | '+NUMBER' parameter necessary for this feature. Good editors like |
|
252 | 252 | (X)Emacs, vi, jed, pico and joe all do. |
|
253 | 253 | |
|
254 | 254 | - If the argument is not found as a variable, IPython will look for a |
|
255 | 255 | file with that name (adding .py if necessary) and load it into the |
|
256 | 256 | editor. It will execute its contents with execfile() when you exit, |
|
257 | 257 | loading any code in the file into your interactive namespace. |
|
258 | 258 | |
|
259 | 259 | After executing your code, %edit will return as output the code you |
|
260 | 260 | typed in the editor (except when it was an existing file). This way |
|
261 | 261 | you can reload the code in further invocations of %edit as a variable, |
|
262 | 262 | via _<NUMBER> or Out[<NUMBER>], where <NUMBER> is the prompt number of |
|
263 | 263 | the output. |
|
264 | 264 | |
|
265 | 265 | Note that %edit is also available through the alias %ed. |
|
266 | 266 | |
|
267 | 267 | This is an example of creating a simple function inside the editor and |
|
268 | 268 | then modifying it. First, start up the editor: |
|
269 | 269 | |
|
270 | 270 | In [1]: ed |
|
271 | 271 | Editing... done. Executing edited code... |
|
272 | 272 | Out[1]: 'def foo():n print "foo() was defined in an editing session"n' |
|
273 | 273 | |
|
274 | 274 | We can then call the function foo(): |
|
275 | 275 | |
|
276 | 276 | In [2]: foo() |
|
277 | 277 | foo() was defined in an editing session |
|
278 | 278 | |
|
279 | 279 | Now we edit foo. IPython automatically loads the editor with the |
|
280 | 280 | (temporary) file where foo() was previously defined: |
|
281 | 281 | |
|
282 | 282 | In [3]: ed foo |
|
283 | 283 | Editing... done. Executing edited code... |
|
284 | 284 | |
|
285 | 285 | And if we call foo() again we get the modified version: |
|
286 | 286 | |
|
287 | 287 | In [4]: foo() |
|
288 | 288 | foo() has now been changed! |
|
289 | 289 | |
|
290 | 290 | Here is an example of how to edit a code snippet successive |
|
291 | 291 | times. First we call the editor: |
|
292 | 292 | |
|
293 | 293 | In [5]: ed |
|
294 | 294 | Editing... done. Executing edited code... |
|
295 | 295 | hello |
|
296 | 296 | Out[5]: "print 'hello'n" |
|
297 | 297 | |
|
298 | 298 | Now we call it again with the previous output (stored in _): |
|
299 | 299 | |
|
300 | 300 | In [6]: ed _ |
|
301 | 301 | Editing... done. Executing edited code... |
|
302 | 302 | hello world |
|
303 | 303 | Out[6]: "print 'hello world'n" |
|
304 | 304 | |
|
305 | 305 | Now we call it with the output #8 (stored in _8, also as Out[8]): |
|
306 | 306 | |
|
307 | 307 | In [7]: ed _8 |
|
308 | 308 | Editing... done. Executing edited code... |
|
309 | 309 | hello again |
|
310 | 310 | Out[7]: "print 'hello again'n" |
|
311 | 311 | """ |
|
312 | 312 | |
|
313 | 313 | opts,args = self.parse_options(parameter_s,'prn:') |
|
314 | 314 | |
|
315 | 315 | try: |
|
316 | 316 | filename, lineno, _ = CodeMagics._find_edit_target(self.shell, args, opts, last_call) |
|
317 | 317 | except MacroToEdit as e: |
|
318 | 318 | # TODO: Implement macro editing over 2 processes. |
|
319 | 319 | print("Macro editing not yet implemented in 2-process model.") |
|
320 | 320 | return |
|
321 | 321 | |
|
322 | 322 | # Make sure we send to the client an absolute path, in case the working |
|
323 | 323 | # directory of client and kernel don't match |
|
324 | 324 | filename = os.path.abspath(filename) |
|
325 | 325 | |
|
326 | 326 | payload = { |
|
327 | 327 | 'source' : 'IPython.kernel.zmq.zmqshell.ZMQInteractiveShell.edit_magic', |
|
328 | 328 | 'filename' : filename, |
|
329 | 329 | 'line_number' : lineno |
|
330 | 330 | } |
|
331 | 331 | self.shell.payload_manager.write_payload(payload) |
|
332 | 332 | |
|
333 | 333 | # A few magics that are adapted to the specifics of using pexpect and a |
|
334 | 334 | # remote terminal |
|
335 | 335 | |
|
336 | 336 | @line_magic |
|
337 | 337 | def clear(self, arg_s): |
|
338 | 338 | """Clear the terminal.""" |
|
339 | 339 | if os.name == 'posix': |
|
340 | 340 | self.shell.system("clear") |
|
341 | 341 | else: |
|
342 | 342 | self.shell.system("cls") |
|
343 | 343 | |
|
344 | 344 | if os.name == 'nt': |
|
345 | 345 | # This is the usual name in windows |
|
346 | 346 | cls = line_magic('cls')(clear) |
|
347 | 347 | |
|
348 | 348 | # Terminal pagers won't work over pexpect, but we do have our own pager |
|
349 | 349 | |
|
350 | 350 | @line_magic |
|
351 | 351 | def less(self, arg_s): |
|
352 | 352 | """Show a file through the pager. |
|
353 | 353 | |
|
354 | 354 | Files ending in .py are syntax-highlighted.""" |
|
355 | 355 | if not arg_s: |
|
356 | 356 | raise UsageError('Missing filename.') |
|
357 | 357 | |
|
358 | 358 | cont = open(arg_s).read() |
|
359 | 359 | if arg_s.endswith('.py'): |
|
360 | 360 | cont = self.shell.pycolorize(openpy.read_py_file(arg_s, skip_encoding_cookie=False)) |
|
361 | 361 | else: |
|
362 | 362 | cont = open(arg_s).read() |
|
363 | 363 | page.page(cont) |
|
364 | 364 | |
|
365 | 365 | more = line_magic('more')(less) |
|
366 | 366 | |
|
367 | 367 | # Man calls a pager, so we also need to redefine it |
|
368 | 368 | if os.name == 'posix': |
|
369 | 369 | @line_magic |
|
370 | 370 | def man(self, arg_s): |
|
371 | 371 | """Find the man page for the given command and display in pager.""" |
|
372 | 372 | page.page(self.shell.getoutput('man %s | col -b' % arg_s, |
|
373 | 373 | split=False)) |
|
374 | 374 | |
|
375 | 375 | @line_magic |
|
376 | 376 | def connect_info(self, arg_s): |
|
377 | 377 | """Print information for connecting other clients to this kernel |
|
378 | 378 | |
|
379 | 379 | It will print the contents of this session's connection file, as well as |
|
380 | 380 | shortcuts for local clients. |
|
381 | 381 | |
|
382 | 382 | In the simplest case, when called from the most recently launched kernel, |
|
383 | 383 | secondary clients can be connected, simply with: |
|
384 | 384 | |
|
385 | 385 | $> ipython <app> --existing |
|
386 | 386 | |
|
387 | 387 | """ |
|
388 | 388 | |
|
389 | 389 | from IPython.core.application import BaseIPythonApplication as BaseIPApp |
|
390 | 390 | |
|
391 | 391 | if BaseIPApp.initialized(): |
|
392 | 392 | app = BaseIPApp.instance() |
|
393 | 393 | security_dir = app.profile_dir.security_dir |
|
394 | 394 | profile = app.profile |
|
395 | 395 | else: |
|
396 | 396 | profile = 'default' |
|
397 | 397 | security_dir = '' |
|
398 | 398 | |
|
399 | 399 | try: |
|
400 | 400 | connection_file = get_connection_file() |
|
401 | 401 | info = get_connection_info(unpack=False) |
|
402 | 402 | except Exception as e: |
|
403 | 403 | error("Could not get connection info: %r" % e) |
|
404 | 404 | return |
|
405 | 405 | |
|
406 | 406 | # add profile flag for non-default profile |
|
407 | 407 | profile_flag = "--profile %s" % profile if profile != 'default' else "" |
|
408 | 408 | |
|
409 | 409 | # if it's in the security dir, truncate to basename |
|
410 | 410 | if security_dir == os.path.dirname(connection_file): |
|
411 | 411 | connection_file = os.path.basename(connection_file) |
|
412 | 412 | |
|
413 | 413 | |
|
414 | 414 | print (info + '\n') |
|
415 | 415 | print ("Paste the above JSON into a file, and connect with:\n" |
|
416 | 416 | " $> ipython <app> --existing <file>\n" |
|
417 | 417 | "or, if you are local, you can connect with just:\n" |
|
418 | 418 | " $> ipython <app> --existing {0} {1}\n" |
|
419 | 419 | "or even just:\n" |
|
420 | 420 | " $> ipython <app> --existing {1}\n" |
|
421 | 421 | "if this is the most recent IPython session you have started.".format( |
|
422 | 422 | connection_file, profile_flag |
|
423 | 423 | ) |
|
424 | 424 | ) |
|
425 | 425 | |
|
426 | 426 | @line_magic |
|
427 | 427 | def qtconsole(self, arg_s): |
|
428 | 428 | """Open a qtconsole connected to this kernel. |
|
429 | 429 | |
|
430 | 430 | Useful for connecting a qtconsole to running notebooks, for better |
|
431 | 431 | debugging. |
|
432 | 432 | """ |
|
433 | 433 | |
|
434 | 434 | # %qtconsole should imply bind_kernel for engines: |
|
435 | 435 | try: |
|
436 | 436 | from IPython.parallel import bind_kernel |
|
437 | 437 | except ImportError: |
|
438 | 438 | # technically possible, because parallel has higher pyzmq min-version |
|
439 | 439 | pass |
|
440 | 440 | else: |
|
441 | 441 | bind_kernel() |
|
442 | 442 | |
|
443 | 443 | try: |
|
444 | 444 | p = connect_qtconsole(argv=arg_split(arg_s, os.name=='posix')) |
|
445 | 445 | except Exception as e: |
|
446 | 446 | error("Could not start qtconsole: %r" % e) |
|
447 | 447 | return |
|
448 | 448 | |
|
449 | 449 | @line_magic |
|
450 | 450 | def autosave(self, arg_s): |
|
451 | 451 | """Set the autosave interval in the notebook (in seconds). |
|
452 | 452 | |
|
453 | 453 | The default value is 120, or two minutes. |
|
454 | 454 | ``%autosave 0`` will disable autosave. |
|
455 | 455 | |
|
456 | 456 | This magic only has an effect when called from the notebook interface. |
|
457 | 457 | It has no effect when called in a startup file. |
|
458 | 458 | """ |
|
459 | 459 | |
|
460 | 460 | try: |
|
461 | 461 | interval = int(arg_s) |
|
462 | 462 | except ValueError: |
|
463 | 463 | raise UsageError("%%autosave requires an integer, got %r" % arg_s) |
|
464 | 464 | |
|
465 | 465 | # javascript wants milliseconds |
|
466 | 466 | milliseconds = 1000 * interval |
|
467 | 467 | display(Javascript("IPython.notebook.set_autosave_interval(%i)" % milliseconds), |
|
468 | 468 | include=['application/javascript'] |
|
469 | 469 | ) |
|
470 | 470 | if interval: |
|
471 | 471 | print("Autosaving every %i seconds" % interval) |
|
472 | 472 | else: |
|
473 | 473 | print("Autosave disabled") |
|
474 | 474 | |
|
475 | def safe_unicode(e): | |
|
476 | """unicode(e) with various fallbacks. Used for exceptions, which may not be | |
|
477 | safe to call unicode() on. | |
|
478 | """ | |
|
479 | try: | |
|
480 | return unicode(e) | |
|
481 | except UnicodeError: | |
|
482 | pass | |
|
483 | ||
|
484 | try: | |
|
485 | return py3compat.str_to_unicode(str(e)) | |
|
486 | except UnicodeError: | |
|
487 | pass | |
|
488 | ||
|
489 | try: | |
|
490 | return py3compat.str_to_unicode(repr(e)) | |
|
491 | except UnicodeError: | |
|
492 | pass | |
|
493 | ||
|
494 | return u'Unrecoverably corrupt evalue' | |
|
495 | ||
|
496 | 475 | |
|
497 | 476 | class ZMQInteractiveShell(InteractiveShell): |
|
498 | 477 | """A subclass of InteractiveShell for ZMQ.""" |
|
499 | 478 | |
|
500 | 479 | displayhook_class = Type(ZMQShellDisplayHook) |
|
501 | 480 | display_pub_class = Type(ZMQDisplayPublisher) |
|
502 | 481 | data_pub_class = Type(ZMQDataPublisher) |
|
503 | 482 | |
|
504 | 483 | # Override the traitlet in the parent class, because there's no point using |
|
505 | 484 | # readline for the kernel. Can be removed when the readline code is moved |
|
506 | 485 | # to the terminal frontend. |
|
507 | 486 | colors_force = CBool(True) |
|
508 | 487 | readline_use = CBool(False) |
|
509 | 488 | # autoindent has no meaning in a zmqshell, and attempting to enable it |
|
510 | 489 | # will print a warning in the absence of readline. |
|
511 | 490 | autoindent = CBool(False) |
|
512 | 491 | |
|
513 | 492 | exiter = Instance(ZMQExitAutocall) |
|
514 | 493 | def _exiter_default(self): |
|
515 | 494 | return ZMQExitAutocall(self) |
|
516 | 495 | |
|
517 | 496 | def _exit_now_changed(self, name, old, new): |
|
518 | 497 | """stop eventloop when exit_now fires""" |
|
519 | 498 | if new: |
|
520 | 499 | loop = ioloop.IOLoop.instance() |
|
521 | 500 | loop.add_timeout(time.time()+0.1, loop.stop) |
|
522 | 501 | |
|
523 | 502 | keepkernel_on_exit = None |
|
524 | 503 | |
|
525 | 504 | # Over ZeroMQ, GUI control isn't done with PyOS_InputHook as there is no |
|
526 | 505 | # interactive input being read; we provide event loop support in ipkernel |
|
527 | 506 | from .eventloops import enable_gui |
|
528 | 507 | enable_gui = staticmethod(enable_gui) |
|
529 | 508 | |
|
530 | 509 | def init_environment(self): |
|
531 | 510 | """Configure the user's environment. |
|
532 | 511 | |
|
533 | 512 | """ |
|
534 | 513 | env = os.environ |
|
535 | 514 | # These two ensure 'ls' produces nice coloring on BSD-derived systems |
|
536 | 515 | env['TERM'] = 'xterm-color' |
|
537 | 516 | env['CLICOLOR'] = '1' |
|
538 | 517 | # Since normal pagers don't work at all (over pexpect we don't have |
|
539 | 518 | # single-key control of the subprocess), try to disable paging in |
|
540 | 519 | # subprocesses as much as possible. |
|
541 | 520 | env['PAGER'] = 'cat' |
|
542 | 521 | env['GIT_PAGER'] = 'cat' |
|
543 | 522 | |
|
544 | 523 | # And install the payload version of page. |
|
545 | 524 | install_payload_page() |
|
546 | 525 | |
|
547 | 526 | def auto_rewrite_input(self, cmd): |
|
548 | 527 | """Called to show the auto-rewritten input for autocall and friends. |
|
549 | 528 | |
|
550 | 529 | FIXME: this payload is currently not correctly processed by the |
|
551 | 530 | frontend. |
|
552 | 531 | """ |
|
553 | 532 | new = self.prompt_manager.render('rewrite') + cmd |
|
554 | 533 | payload = dict( |
|
555 | 534 | source='IPython.kernel.zmq.zmqshell.ZMQInteractiveShell.auto_rewrite_input', |
|
556 | 535 | transformed_input=new, |
|
557 | 536 | ) |
|
558 | 537 | self.payload_manager.write_payload(payload) |
|
559 | 538 | |
|
560 | 539 | def ask_exit(self): |
|
561 | 540 | """Engage the exit actions.""" |
|
562 | 541 | self.exit_now = True |
|
563 | 542 | payload = dict( |
|
564 | 543 | source='IPython.kernel.zmq.zmqshell.ZMQInteractiveShell.ask_exit', |
|
565 | 544 | exit=True, |
|
566 | 545 | keepkernel=self.keepkernel_on_exit, |
|
567 | 546 | ) |
|
568 | 547 | self.payload_manager.write_payload(payload) |
|
569 | 548 | |
|
570 | 549 | def _showtraceback(self, etype, evalue, stb): |
|
571 | 550 | |
|
572 | 551 | exc_content = { |
|
573 | 552 | u'traceback' : stb, |
|
574 | 553 | u'ename' : unicode(etype.__name__), |
|
575 | u'evalue' : safe_unicode(evalue) | |
|
554 | u'evalue' : py3compat.safe_unicode(evalue), | |
|
576 | 555 | } |
|
577 | 556 | |
|
578 | 557 | dh = self.displayhook |
|
579 | 558 | # Send exception info over pub socket for other clients than the caller |
|
580 | 559 | # to pick up |
|
581 | 560 | topic = None |
|
582 | 561 | if dh.topic: |
|
583 | 562 | topic = dh.topic.replace(b'pyout', b'pyerr') |
|
584 | 563 | |
|
585 | 564 | exc_msg = dh.session.send(dh.pub_socket, u'pyerr', json_clean(exc_content), dh.parent_header, ident=topic) |
|
586 | 565 | |
|
587 | 566 | # FIXME - Hack: store exception info in shell object. Right now, the |
|
588 | 567 | # caller is reading this info after the fact, we need to fix this logic |
|
589 | 568 | # to remove this hack. Even uglier, we need to store the error status |
|
590 | 569 | # here, because in the main loop, the logic that sets it is being |
|
591 | 570 | # skipped because runlines swallows the exceptions. |
|
592 | 571 | exc_content[u'status'] = u'error' |
|
593 | 572 | self._reply_content = exc_content |
|
594 | 573 | # /FIXME |
|
595 | 574 | |
|
596 | 575 | return exc_content |
|
597 | 576 | |
|
598 | 577 | def set_next_input(self, text): |
|
599 | 578 | """Send the specified text to the frontend to be presented at the next |
|
600 | 579 | input cell.""" |
|
601 | 580 | payload = dict( |
|
602 | 581 | source='IPython.kernel.zmq.zmqshell.ZMQInteractiveShell.set_next_input', |
|
603 | 582 | text=text |
|
604 | 583 | ) |
|
605 | 584 | self.payload_manager.write_payload(payload) |
|
606 | 585 | |
|
607 | 586 | #------------------------------------------------------------------------- |
|
608 | 587 | # Things related to magics |
|
609 | 588 | #------------------------------------------------------------------------- |
|
610 | 589 | |
|
611 | 590 | def init_magics(self): |
|
612 | 591 | super(ZMQInteractiveShell, self).init_magics() |
|
613 | 592 | self.register_magics(KernelMagics) |
|
614 | 593 | self.magics_manager.register_alias('ed', 'edit') |
|
615 | 594 | |
|
616 | 595 | |
|
617 | 596 | |
|
618 | 597 | InteractiveShellABC.register(ZMQInteractiveShell) |
@@ -1,183 +1,204 b'' | |||
|
1 | 1 | # coding: utf-8 |
|
2 | 2 | """Compatibility tricks for Python 3. Mainly to do with unicode.""" |
|
3 | 3 | import __builtin__ |
|
4 | 4 | import functools |
|
5 | 5 | import sys |
|
6 | 6 | import re |
|
7 | 7 | import types |
|
8 | 8 | |
|
9 | 9 | from .encoding import DEFAULT_ENCODING |
|
10 | 10 | |
|
11 | 11 | orig_open = open |
|
12 | 12 | |
|
13 | 13 | def no_code(x, encoding=None): |
|
14 | 14 | return x |
|
15 | 15 | |
|
16 | 16 | def decode(s, encoding=None): |
|
17 | 17 | encoding = encoding or DEFAULT_ENCODING |
|
18 | 18 | return s.decode(encoding, "replace") |
|
19 | 19 | |
|
20 | 20 | def encode(u, encoding=None): |
|
21 | 21 | encoding = encoding or DEFAULT_ENCODING |
|
22 | 22 | return u.encode(encoding, "replace") |
|
23 | 23 | |
|
24 | 24 | |
|
25 | 25 | def cast_unicode(s, encoding=None): |
|
26 | 26 | if isinstance(s, bytes): |
|
27 | 27 | return decode(s, encoding) |
|
28 | 28 | return s |
|
29 | 29 | |
|
30 | 30 | def cast_bytes(s, encoding=None): |
|
31 | 31 | if not isinstance(s, bytes): |
|
32 | 32 | return encode(s, encoding) |
|
33 | 33 | return s |
|
34 | 34 | |
|
35 | 35 | def _modify_str_or_docstring(str_change_func): |
|
36 | 36 | @functools.wraps(str_change_func) |
|
37 | 37 | def wrapper(func_or_str): |
|
38 | 38 | if isinstance(func_or_str, basestring): |
|
39 | 39 | func = None |
|
40 | 40 | doc = func_or_str |
|
41 | 41 | else: |
|
42 | 42 | func = func_or_str |
|
43 | 43 | doc = func.__doc__ |
|
44 | 44 | |
|
45 | 45 | doc = str_change_func(doc) |
|
46 | 46 | |
|
47 | 47 | if func: |
|
48 | 48 | func.__doc__ = doc |
|
49 | 49 | return func |
|
50 | 50 | return doc |
|
51 | 51 | return wrapper |
|
52 | 52 | |
|
53 | def safe_unicode(e): | |
|
54 | """unicode(e) with various fallbacks. Used for exceptions, which may not be | |
|
55 | safe to call unicode() on. | |
|
56 | """ | |
|
57 | try: | |
|
58 | return unicode(e) | |
|
59 | except UnicodeError: | |
|
60 | pass | |
|
61 | ||
|
62 | try: | |
|
63 | return py3compat.str_to_unicode(str(e)) | |
|
64 | except UnicodeError: | |
|
65 | pass | |
|
66 | ||
|
67 | try: | |
|
68 | return py3compat.str_to_unicode(repr(e)) | |
|
69 | except UnicodeError: | |
|
70 | pass | |
|
71 | ||
|
72 | return u'Unrecoverably corrupt evalue' | |
|
73 | ||
|
53 | 74 | if sys.version_info[0] >= 3: |
|
54 | 75 | PY3 = True |
|
55 | 76 | |
|
56 | 77 | input = input |
|
57 | 78 | builtin_mod_name = "builtins" |
|
58 | 79 | |
|
59 | 80 | str_to_unicode = no_code |
|
60 | 81 | unicode_to_str = no_code |
|
61 | 82 | str_to_bytes = encode |
|
62 | 83 | bytes_to_str = decode |
|
63 | 84 | cast_bytes_py2 = no_code |
|
64 | 85 | |
|
65 | 86 | string_types = (str,) |
|
66 | 87 | |
|
67 | 88 | def isidentifier(s, dotted=False): |
|
68 | 89 | if dotted: |
|
69 | 90 | return all(isidentifier(a) for a in s.split(".")) |
|
70 | 91 | return s.isidentifier() |
|
71 | 92 | |
|
72 | 93 | open = orig_open |
|
73 | 94 | |
|
74 | 95 | MethodType = types.MethodType |
|
75 | 96 | |
|
76 | 97 | def execfile(fname, glob, loc=None): |
|
77 | 98 | loc = loc if (loc is not None) else glob |
|
78 | 99 | with open(fname, 'rb') as f: |
|
79 | 100 | exec compile(f.read(), fname, 'exec') in glob, loc |
|
80 | 101 | |
|
81 | 102 | # Refactor print statements in doctests. |
|
82 | 103 | _print_statement_re = re.compile(r"\bprint (?P<expr>.*)$", re.MULTILINE) |
|
83 | 104 | def _print_statement_sub(match): |
|
84 | 105 | expr = match.groups('expr') |
|
85 | 106 | return "print(%s)" % expr |
|
86 | 107 | |
|
87 | 108 | @_modify_str_or_docstring |
|
88 | 109 | def doctest_refactor_print(doc): |
|
89 | 110 | """Refactor 'print x' statements in a doctest to print(x) style. 2to3 |
|
90 | 111 | unfortunately doesn't pick up on our doctests. |
|
91 | 112 | |
|
92 | 113 | Can accept a string or a function, so it can be used as a decorator.""" |
|
93 | 114 | return _print_statement_re.sub(_print_statement_sub, doc) |
|
94 | 115 | |
|
95 | 116 | # Abstract u'abc' syntax: |
|
96 | 117 | @_modify_str_or_docstring |
|
97 | 118 | def u_format(s): |
|
98 | 119 | """"{u}'abc'" --> "'abc'" (Python 3) |
|
99 | 120 | |
|
100 | 121 | Accepts a string or a function, so it can be used as a decorator.""" |
|
101 | 122 | return s.format(u='') |
|
102 | 123 | |
|
103 | 124 | else: |
|
104 | 125 | PY3 = False |
|
105 | 126 | |
|
106 | 127 | input = raw_input |
|
107 | 128 | builtin_mod_name = "__builtin__" |
|
108 | 129 | |
|
109 | 130 | str_to_unicode = decode |
|
110 | 131 | unicode_to_str = encode |
|
111 | 132 | str_to_bytes = no_code |
|
112 | 133 | bytes_to_str = no_code |
|
113 | 134 | cast_bytes_py2 = cast_bytes |
|
114 | 135 | |
|
115 | 136 | string_types = (str, unicode) |
|
116 | 137 | |
|
117 | 138 | import re |
|
118 | 139 | _name_re = re.compile(r"[a-zA-Z_][a-zA-Z0-9_]*$") |
|
119 | 140 | def isidentifier(s, dotted=False): |
|
120 | 141 | if dotted: |
|
121 | 142 | return all(isidentifier(a) for a in s.split(".")) |
|
122 | 143 | return bool(_name_re.match(s)) |
|
123 | 144 | |
|
124 | 145 | class open(object): |
|
125 | 146 | """Wrapper providing key part of Python 3 open() interface.""" |
|
126 | 147 | def __init__(self, fname, mode="r", encoding="utf-8"): |
|
127 | 148 | self.f = orig_open(fname, mode) |
|
128 | 149 | self.enc = encoding |
|
129 | 150 | |
|
130 | 151 | def write(self, s): |
|
131 | 152 | return self.f.write(s.encode(self.enc)) |
|
132 | 153 | |
|
133 | 154 | def read(self, size=-1): |
|
134 | 155 | return self.f.read(size).decode(self.enc) |
|
135 | 156 | |
|
136 | 157 | def close(self): |
|
137 | 158 | return self.f.close() |
|
138 | 159 | |
|
139 | 160 | def __enter__(self): |
|
140 | 161 | return self |
|
141 | 162 | |
|
142 | 163 | def __exit__(self, etype, value, traceback): |
|
143 | 164 | self.f.close() |
|
144 | 165 | |
|
145 | 166 | def MethodType(func, instance): |
|
146 | 167 | return types.MethodType(func, instance, type(instance)) |
|
147 | 168 | |
|
148 | 169 | # don't override system execfile on 2.x: |
|
149 | 170 | execfile = execfile |
|
150 | 171 | |
|
151 | 172 | def doctest_refactor_print(func_or_str): |
|
152 | 173 | return func_or_str |
|
153 | 174 | |
|
154 | 175 | |
|
155 | 176 | # Abstract u'abc' syntax: |
|
156 | 177 | @_modify_str_or_docstring |
|
157 | 178 | def u_format(s): |
|
158 | 179 | """"{u}'abc'" --> "u'abc'" (Python 2) |
|
159 | 180 | |
|
160 | 181 | Accepts a string or a function, so it can be used as a decorator.""" |
|
161 | 182 | return s.format(u='u') |
|
162 | 183 | |
|
163 | 184 | if sys.platform == 'win32': |
|
164 | 185 | def execfile(fname, glob=None, loc=None): |
|
165 | 186 | loc = loc if (loc is not None) else glob |
|
166 | 187 | # The rstrip() is necessary b/c trailing whitespace in files will |
|
167 | 188 | # cause an IndentationError in Python 2.6 (this was fixed in 2.7, |
|
168 | 189 | # but we still support 2.6). See issue 1027. |
|
169 | 190 | scripttext = __builtin__.open(fname).read().rstrip() + '\n' |
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170 | 191 | # compile converts unicode filename to str assuming |
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171 | 192 | # ascii. Let's do the conversion before calling compile |
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172 | 193 | if isinstance(fname, unicode): |
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173 | 194 | filename = unicode_to_str(fname) |
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174 | 195 | else: |
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175 | 196 | filename = fname |
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176 | 197 | exec compile(scripttext, filename, 'exec') in glob, loc |
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177 | 198 | else: |
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178 | 199 | def execfile(fname, *where): |
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179 | 200 | if isinstance(fname, unicode): |
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180 | 201 | filename = fname.encode(sys.getfilesystemencoding()) |
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181 | 202 | else: |
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182 | 203 | filename = fname |
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183 | 204 | __builtin__.execfile(filename, *where) |
@@ -1,1068 +1,1069 b'' | |||
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1 | 1 | .. _messaging: |
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2 | 2 | |
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3 | 3 | ====================== |
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4 | 4 | Messaging in IPython |
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5 | 5 | ====================== |
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6 | 6 | |
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7 | 7 | |
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8 | 8 | Introduction |
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9 | 9 | ============ |
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10 | 10 | |
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11 | 11 | This document explains the basic communications design and messaging |
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12 | 12 | specification for how the various IPython objects interact over a network |
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13 | 13 | transport. The current implementation uses the ZeroMQ_ library for messaging |
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14 | 14 | within and between hosts. |
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15 | 15 | |
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16 | 16 | .. Note:: |
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17 | 17 | |
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18 | 18 | This document should be considered the authoritative description of the |
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19 | 19 | IPython messaging protocol, and all developers are strongly encouraged to |
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20 | 20 | keep it updated as the implementation evolves, so that we have a single |
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21 | 21 | common reference for all protocol details. |
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22 | 22 | |
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23 | 23 | The basic design is explained in the following diagram: |
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24 | 24 | |
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25 | 25 | .. image:: figs/frontend-kernel.png |
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26 | 26 | :width: 450px |
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27 | 27 | :alt: IPython kernel/frontend messaging architecture. |
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28 | 28 | :align: center |
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29 | 29 | :target: ../_images/frontend-kernel.png |
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30 | 30 | |
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31 | 31 | A single kernel can be simultaneously connected to one or more frontends. The |
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32 | 32 | kernel has three sockets that serve the following functions: |
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33 | 33 | |
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34 | 34 | 1. stdin: this ROUTER socket is connected to all frontends, and it allows |
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35 | 35 | the kernel to request input from the active frontend when :func:`raw_input` is called. |
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36 | 36 | The frontend that executed the code has a DEALER socket that acts as a 'virtual keyboard' |
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37 | 37 | for the kernel while this communication is happening (illustrated in the |
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38 | 38 | figure by the black outline around the central keyboard). In practice, |
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39 | 39 | frontends may display such kernel requests using a special input widget or |
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40 | 40 | otherwise indicating that the user is to type input for the kernel instead |
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41 | 41 | of normal commands in the frontend. |
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42 | 42 | |
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43 | 43 | 2. Shell: this single ROUTER socket allows multiple incoming connections from |
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44 | 44 | frontends, and this is the socket where requests for code execution, object |
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45 | 45 | information, prompts, etc. are made to the kernel by any frontend. The |
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46 | 46 | communication on this socket is a sequence of request/reply actions from |
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47 | 47 | each frontend and the kernel. |
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48 | 48 | |
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49 | 49 | 3. IOPub: this socket is the 'broadcast channel' where the kernel publishes all |
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50 | 50 | side effects (stdout, stderr, etc.) as well as the requests coming from any |
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51 | 51 | client over the shell socket and its own requests on the stdin socket. There |
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52 | 52 | are a number of actions in Python which generate side effects: :func:`print` |
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53 | 53 | writes to ``sys.stdout``, errors generate tracebacks, etc. Additionally, in |
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54 | 54 | a multi-client scenario, we want all frontends to be able to know what each |
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55 | 55 | other has sent to the kernel (this can be useful in collaborative scenarios, |
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56 | 56 | for example). This socket allows both side effects and the information |
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57 | 57 | about communications taking place with one client over the shell channel |
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58 | 58 | to be made available to all clients in a uniform manner. |
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59 | 59 | |
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60 | 60 | All messages are tagged with enough information (details below) for clients |
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61 | 61 | to know which messages come from their own interaction with the kernel and |
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62 | 62 | which ones are from other clients, so they can display each type |
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63 | 63 | appropriately. |
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64 | 64 | |
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65 | 65 | The actual format of the messages allowed on each of these channels is |
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66 | 66 | specified below. Messages are dicts of dicts with string keys and values that |
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67 | 67 | are reasonably representable in JSON. Our current implementation uses JSON |
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68 | 68 | explicitly as its message format, but this shouldn't be considered a permanent |
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69 | 69 | feature. As we've discovered that JSON has non-trivial performance issues due |
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70 | 70 | to excessive copying, we may in the future move to a pure pickle-based raw |
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71 | 71 | message format. However, it should be possible to easily convert from the raw |
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72 | 72 | objects to JSON, since we may have non-python clients (e.g. a web frontend). |
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73 | 73 | As long as it's easy to make a JSON version of the objects that is a faithful |
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74 | 74 | representation of all the data, we can communicate with such clients. |
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75 | 75 | |
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76 | 76 | .. Note:: |
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77 | 77 | |
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78 | 78 | Not all of these have yet been fully fleshed out, but the key ones are, see |
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79 | 79 | kernel and frontend files for actual implementation details. |
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80 | 80 | |
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81 | 81 | General Message Format |
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82 | 82 | ====================== |
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83 | 83 | |
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84 | 84 | A message is defined by the following four-dictionary structure:: |
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85 | 85 | |
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86 | 86 | { |
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87 | 87 | # The message header contains a pair of unique identifiers for the |
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88 | 88 | # originating session and the actual message id, in addition to the |
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89 | 89 | # username for the process that generated the message. This is useful in |
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90 | 90 | # collaborative settings where multiple users may be interacting with the |
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91 | 91 | # same kernel simultaneously, so that frontends can label the various |
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92 | 92 | # messages in a meaningful way. |
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93 | 93 | 'header' : { |
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94 | 94 | 'msg_id' : uuid, |
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95 | 95 | 'username' : str, |
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96 | 96 | 'session' : uuid |
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97 | 97 | # All recognized message type strings are listed below. |
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98 | 98 | 'msg_type' : str, |
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99 | 99 | }, |
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100 | 100 | |
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101 | 101 | # In a chain of messages, the header from the parent is copied so that |
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102 | 102 | # clients can track where messages come from. |
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103 | 103 | 'parent_header' : dict, |
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104 | 104 | |
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105 | 105 | # The actual content of the message must be a dict, whose structure |
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106 | 106 | # depends on the message type. |
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107 | 107 | 'content' : dict, |
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108 | 108 | |
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109 | 109 | # Any metadata associated with the message. |
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110 | 110 | 'metadata' : dict, |
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111 | 111 | } |
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112 | 112 | |
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113 | 113 | |
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114 | 114 | Python functional API |
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115 | 115 | ===================== |
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116 | 116 | |
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117 | 117 | As messages are dicts, they map naturally to a ``func(**kw)`` call form. We |
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118 | 118 | should develop, at a few key points, functional forms of all the requests that |
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119 | 119 | take arguments in this manner and automatically construct the necessary dict |
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120 | 120 | for sending. |
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121 | 121 | |
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122 | 122 | In addition, the Python implementation of the message specification extends |
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123 | 123 | messages upon deserialization to the following form for convenience:: |
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124 | 124 | |
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125 | 125 | { |
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126 | 126 | 'header' : dict, |
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127 | 127 | # The msg's unique identifier and type are always stored in the header, |
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128 | 128 | # but the Python implementation copies them to the top level. |
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129 | 129 | 'msg_id' : uuid, |
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130 | 130 | 'msg_type' : str, |
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131 | 131 | 'parent_header' : dict, |
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132 | 132 | 'content' : dict, |
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133 | 133 | 'metadata' : dict, |
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134 | 134 | } |
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135 | 135 | |
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136 | 136 | All messages sent to or received by any IPython process should have this |
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137 | 137 | extended structure. |
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138 | 138 | |
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139 | 139 | |
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140 | 140 | Messages on the shell ROUTER/DEALER sockets |
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141 | 141 | =========================================== |
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142 | 142 | |
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143 | 143 | .. _execute: |
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144 | 144 | |
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145 | 145 | Execute |
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146 | 146 | ------- |
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147 | 147 | |
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148 | 148 | This message type is used by frontends to ask the kernel to execute code on |
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149 | 149 | behalf of the user, in a namespace reserved to the user's variables (and thus |
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150 | 150 | separate from the kernel's own internal code and variables). |
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151 | 151 | |
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152 | 152 | Message type: ``execute_request``:: |
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153 | 153 | |
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154 | 154 | content = { |
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155 | 155 | # Source code to be executed by the kernel, one or more lines. |
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156 | 156 | 'code' : str, |
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157 | 157 | |
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158 | 158 | # A boolean flag which, if True, signals the kernel to execute |
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159 | 159 | # this code as quietly as possible. This means that the kernel |
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160 | 160 | # will compile the code with 'exec' instead of 'single' (so |
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161 | 161 | # sys.displayhook will not fire), forces store_history to be False, |
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162 | 162 | # and will *not*: |
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163 | 163 | # - broadcast exceptions on the PUB socket |
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164 | 164 | # - do any logging |
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165 | 165 | # |
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166 | 166 | # The default is False. |
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167 | 167 | 'silent' : bool, |
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168 | 168 | |
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169 | 169 | # A boolean flag which, if True, signals the kernel to populate history |
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170 | 170 | # The default is True if silent is False. If silent is True, store_history |
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171 | 171 | # is forced to be False. |
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172 | 172 | 'store_history' : bool, |
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173 | 173 | |
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174 |
# A list of variable names from the user's namespace to be retrieved. |
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175 | # returns is a JSON string of the variable's repr(), not a python object. | |
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174 | # A list of variable names from the user's namespace to be retrieved. | |
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175 | # What returns is a rich representation of each variable (dict keyed by name). | |
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176 | # See the display_data content for the structure of the representation data. | |
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176 | 177 | 'user_variables' : list, |
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177 | 178 | |
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178 | 179 | # Similarly, a dict mapping names to expressions to be evaluated in the |
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179 | 180 | # user's dict. |
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180 | 181 | 'user_expressions' : dict, |
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181 | 182 | |
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182 | 183 | # Some frontends (e.g. the Notebook) do not support stdin requests. If |
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183 | 184 | # raw_input is called from code executed from such a frontend, a |
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184 | 185 | # StdinNotImplementedError will be raised. |
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185 | 186 | 'allow_stdin' : True, |
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186 | 187 | |
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187 | 188 | } |
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188 | 189 | |
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189 | 190 | The ``code`` field contains a single string (possibly multiline). The kernel |
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190 | 191 | is responsible for splitting this into one or more independent execution blocks |
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191 | 192 | and deciding whether to compile these in 'single' or 'exec' mode (see below for |
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192 | 193 | detailed execution semantics). |
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193 | 194 | |
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194 | 195 | The ``user_`` fields deserve a detailed explanation. In the past, IPython had |
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195 | 196 | the notion of a prompt string that allowed arbitrary code to be evaluated, and |
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196 | 197 | this was put to good use by many in creating prompts that displayed system |
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197 | 198 | status, path information, and even more esoteric uses like remote instrument |
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198 | 199 | status acquired over the network. But now that IPython has a clean separation |
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199 | 200 | between the kernel and the clients, the kernel has no prompt knowledge; prompts |
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200 | 201 | are a frontend-side feature, and it should be even possible for different |
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201 | 202 | frontends to display different prompts while interacting with the same kernel. |
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202 | 203 | |
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203 | 204 | The kernel now provides the ability to retrieve data from the user's namespace |
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204 | 205 | after the execution of the main ``code``, thanks to two fields in the |
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205 | 206 | ``execute_request`` message: |
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206 | 207 | |
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207 | 208 | - ``user_variables``: If only variables from the user's namespace are needed, a |
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208 | 209 | list of variable names can be passed and a dict with these names as keys and |
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209 | 210 | their :func:`repr()` as values will be returned. |
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210 | 211 | |
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211 | 212 | - ``user_expressions``: For more complex expressions that require function |
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212 | 213 | evaluations, a dict can be provided with string keys and arbitrary python |
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213 | 214 | expressions as values. The return message will contain also a dict with the |
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214 | 215 | same keys and the :func:`repr()` of the evaluated expressions as value. |
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215 | 216 | |
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216 | 217 | With this information, frontends can display any status information they wish |
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217 | 218 | in the form that best suits each frontend (a status line, a popup, inline for a |
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218 | 219 | terminal, etc). |
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219 | 220 | |
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220 | 221 | .. Note:: |
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221 | 222 | |
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222 | 223 | In order to obtain the current execution counter for the purposes of |
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223 | 224 | displaying input prompts, frontends simply make an execution request with an |
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224 | 225 | empty code string and ``silent=True``. |
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225 | 226 | |
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226 | 227 | Execution semantics |
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227 | 228 | ~~~~~~~~~~~~~~~~~~~ |
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228 | 229 | |
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229 | 230 | When the silent flag is false, the execution of use code consists of the |
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230 | 231 | following phases (in silent mode, only the ``code`` field is executed): |
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231 | 232 | |
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232 | 233 | 1. Run the ``pre_runcode_hook``. |
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233 | 234 | |
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234 | 235 | 2. Execute the ``code`` field, see below for details. |
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235 | 236 | |
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236 | 237 | 3. If #2 succeeds, compute ``user_variables`` and ``user_expressions`` are |
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237 | 238 | computed. This ensures that any error in the latter don't harm the main |
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238 | 239 | code execution. |
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239 | 240 | |
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240 | 241 | 4. Call any method registered with :meth:`register_post_execute`. |
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241 | 242 | |
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242 | 243 | .. warning:: |
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243 | 244 | |
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244 | 245 | The API for running code before/after the main code block is likely to |
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245 | 246 | change soon. Both the ``pre_runcode_hook`` and the |
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246 | 247 | :meth:`register_post_execute` are susceptible to modification, as we find a |
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247 | 248 | consistent model for both. |
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248 | 249 | |
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249 | 250 | To understand how the ``code`` field is executed, one must know that Python |
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250 | 251 | code can be compiled in one of three modes (controlled by the ``mode`` argument |
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251 | 252 | to the :func:`compile` builtin): |
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252 | 253 | |
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253 | 254 | *single* |
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254 | 255 | Valid for a single interactive statement (though the source can contain |
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255 | 256 | multiple lines, such as a for loop). When compiled in this mode, the |
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256 | 257 | generated bytecode contains special instructions that trigger the calling of |
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257 | 258 | :func:`sys.displayhook` for any expression in the block that returns a value. |
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258 | 259 | This means that a single statement can actually produce multiple calls to |
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259 | 260 | :func:`sys.displayhook`, if for example it contains a loop where each |
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260 | 261 | iteration computes an unassigned expression would generate 10 calls:: |
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261 | 262 | |
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262 | 263 | for i in range(10): |
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263 | 264 | i**2 |
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264 | 265 | |
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265 | 266 | *exec* |
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266 | 267 | An arbitrary amount of source code, this is how modules are compiled. |
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267 | 268 | :func:`sys.displayhook` is *never* implicitly called. |
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268 | 269 | |
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269 | 270 | *eval* |
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270 | 271 | A single expression that returns a value. :func:`sys.displayhook` is *never* |
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271 | 272 | implicitly called. |
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272 | 273 | |
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273 | 274 | |
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274 | 275 | The ``code`` field is split into individual blocks each of which is valid for |
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275 | 276 | execution in 'single' mode, and then: |
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276 | 277 | |
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277 | 278 | - If there is only a single block: it is executed in 'single' mode. |
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278 | 279 | |
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279 | 280 | - If there is more than one block: |
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280 | 281 | |
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281 | 282 | * if the last one is a single line long, run all but the last in 'exec' mode |
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282 | 283 | and the very last one in 'single' mode. This makes it easy to type simple |
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283 | 284 | expressions at the end to see computed values. |
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284 | 285 | |
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285 | 286 | * if the last one is no more than two lines long, run all but the last in |
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286 | 287 | 'exec' mode and the very last one in 'single' mode. This makes it easy to |
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287 | 288 | type simple expressions at the end to see computed values. - otherwise |
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288 | 289 | (last one is also multiline), run all in 'exec' mode |
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289 | 290 | |
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290 | 291 | * otherwise (last one is also multiline), run all in 'exec' mode as a single |
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291 | 292 | unit. |
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292 | 293 | |
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293 | 294 | Any error in retrieving the ``user_variables`` or evaluating the |
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294 | 295 | ``user_expressions`` will result in a simple error message in the return fields |
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295 | 296 | of the form:: |
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296 | 297 | |
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297 | 298 | [ERROR] ExceptionType: Exception message |
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298 | 299 | |
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299 | 300 | The user can simply send the same variable name or expression for evaluation to |
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300 | 301 | see a regular traceback. |
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301 | 302 | |
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302 | 303 | Errors in any registered post_execute functions are also reported similarly, |
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303 | 304 | and the failing function is removed from the post_execution set so that it does |
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304 | 305 | not continue triggering failures. |
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305 | 306 | |
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306 | 307 | Upon completion of the execution request, the kernel *always* sends a reply, |
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307 | 308 | with a status code indicating what happened and additional data depending on |
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308 | 309 | the outcome. See :ref:`below <execution_results>` for the possible return |
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309 | 310 | codes and associated data. |
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310 | 311 | |
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311 | 312 | |
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312 | 313 | Execution counter (old prompt number) |
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313 | 314 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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314 | 315 | |
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315 | 316 | The kernel has a single, monotonically increasing counter of all execution |
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316 | 317 | requests that are made with ``store_history=True``. This counter is used to populate |
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317 | 318 | the ``In[n]``, ``Out[n]`` and ``_n`` variables, so clients will likely want to |
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318 | 319 | display it in some form to the user, which will typically (but not necessarily) |
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319 | 320 | be done in the prompts. The value of this counter will be returned as the |
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320 | 321 | ``execution_count`` field of all ``execute_reply`` messages. |
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321 | 322 | |
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322 | 323 | .. _execution_results: |
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323 | 324 | |
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324 | 325 | Execution results |
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325 | 326 | ~~~~~~~~~~~~~~~~~ |
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326 | 327 | |
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327 | 328 | Message type: ``execute_reply``:: |
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328 | 329 | |
|
329 | 330 | content = { |
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330 | 331 | # One of: 'ok' OR 'error' OR 'abort' |
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331 | 332 | 'status' : str, |
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332 | 333 | |
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333 | 334 | # The global kernel counter that increases by one with each request that |
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334 | 335 | # stores history. This will typically be used by clients to display |
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335 | 336 | # prompt numbers to the user. If the request did not store history, this will |
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336 | 337 | # be the current value of the counter in the kernel. |
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337 | 338 | 'execution_count' : int, |
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338 | 339 | } |
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339 | 340 | |
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340 | 341 | When status is 'ok', the following extra fields are present:: |
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341 | 342 | |
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342 | 343 | { |
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343 | 344 | # 'payload' will be a list of payload dicts. |
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344 | 345 | # Each execution payload is a dict with string keys that may have been |
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345 | 346 | # produced by the code being executed. It is retrieved by the kernel at |
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346 | 347 | # the end of the execution and sent back to the front end, which can take |
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347 | 348 | # action on it as needed. See main text for further details. |
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348 | 349 | 'payload' : list(dict), |
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349 | 350 | |
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350 | 351 | # Results for the user_variables and user_expressions. |
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351 | 352 | 'user_variables' : dict, |
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352 | 353 | 'user_expressions' : dict, |
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353 | 354 | } |
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354 | 355 | |
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355 | 356 | .. admonition:: Execution payloads |
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356 | 357 | |
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357 | 358 | The notion of an 'execution payload' is different from a return value of a |
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358 | 359 | given set of code, which normally is just displayed on the pyout stream |
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359 | 360 | through the PUB socket. The idea of a payload is to allow special types of |
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360 | 361 | code, typically magics, to populate a data container in the IPython kernel |
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361 | 362 | that will be shipped back to the caller via this channel. The kernel |
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362 | 363 | has an API for this in the PayloadManager:: |
|
363 | 364 | |
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364 | 365 | ip.payload_manager.write_payload(payload_dict) |
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365 | 366 | |
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366 | 367 | which appends a dictionary to the list of payloads. |
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367 | 368 | |
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368 | 369 | |
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369 | 370 | When status is 'error', the following extra fields are present:: |
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370 | 371 | |
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371 | 372 | { |
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372 | 373 | 'ename' : str, # Exception name, as a string |
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373 | 374 | 'evalue' : str, # Exception value, as a string |
|
374 | 375 | |
|
375 | 376 | # The traceback will contain a list of frames, represented each as a |
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376 | 377 | # string. For now we'll stick to the existing design of ultraTB, which |
|
377 | 378 | # controls exception level of detail statefully. But eventually we'll |
|
378 | 379 | # want to grow into a model where more information is collected and |
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379 | 380 | # packed into the traceback object, with clients deciding how little or |
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380 | 381 | # how much of it to unpack. But for now, let's start with a simple list |
|
381 | 382 | # of strings, since that requires only minimal changes to ultratb as |
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382 | 383 | # written. |
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383 | 384 | 'traceback' : list, |
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384 | 385 | } |
|
385 | 386 | |
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386 | 387 | |
|
387 | 388 | When status is 'abort', there are for now no additional data fields. This |
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388 | 389 | happens when the kernel was interrupted by a signal. |
|
389 | 390 | |
|
390 | 391 | Kernel attribute access |
|
391 | 392 | ----------------------- |
|
392 | 393 | |
|
393 | 394 | .. warning:: |
|
394 | 395 | |
|
395 | 396 | This part of the messaging spec is not actually implemented in the kernel |
|
396 | 397 | yet. |
|
397 | 398 | |
|
398 | 399 | While this protocol does not specify full RPC access to arbitrary methods of |
|
399 | 400 | the kernel object, the kernel does allow read (and in some cases write) access |
|
400 | 401 | to certain attributes. |
|
401 | 402 | |
|
402 | 403 | The policy for which attributes can be read is: any attribute of the kernel, or |
|
403 | 404 | its sub-objects, that belongs to a :class:`Configurable` object and has been |
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404 | 405 | declared at the class-level with Traits validation, is in principle accessible |
|
405 | 406 | as long as its name does not begin with a leading underscore. The attribute |
|
406 | 407 | itself will have metadata indicating whether it allows remote read and/or write |
|
407 | 408 | access. The message spec follows for attribute read and write requests. |
|
408 | 409 | |
|
409 | 410 | Message type: ``getattr_request``:: |
|
410 | 411 | |
|
411 | 412 | content = { |
|
412 | 413 | # The (possibly dotted) name of the attribute |
|
413 | 414 | 'name' : str, |
|
414 | 415 | } |
|
415 | 416 | |
|
416 | 417 | When a ``getattr_request`` fails, there are two possible error types: |
|
417 | 418 | |
|
418 | 419 | - AttributeError: this type of error was raised when trying to access the |
|
419 | 420 | given name by the kernel itself. This means that the attribute likely |
|
420 | 421 | doesn't exist. |
|
421 | 422 | |
|
422 | 423 | - AccessError: the attribute exists but its value is not readable remotely. |
|
423 | 424 | |
|
424 | 425 | |
|
425 | 426 | Message type: ``getattr_reply``:: |
|
426 | 427 | |
|
427 | 428 | content = { |
|
428 | 429 | # One of ['ok', 'AttributeError', 'AccessError']. |
|
429 | 430 | 'status' : str, |
|
430 | 431 | # If status is 'ok', a JSON object. |
|
431 | 432 | 'value' : object, |
|
432 | 433 | } |
|
433 | 434 | |
|
434 | 435 | Message type: ``setattr_request``:: |
|
435 | 436 | |
|
436 | 437 | content = { |
|
437 | 438 | # The (possibly dotted) name of the attribute |
|
438 | 439 | 'name' : str, |
|
439 | 440 | |
|
440 | 441 | # A JSON-encoded object, that will be validated by the Traits |
|
441 | 442 | # information in the kernel |
|
442 | 443 | 'value' : object, |
|
443 | 444 | } |
|
444 | 445 | |
|
445 | 446 | When a ``setattr_request`` fails, there are also two possible error types with |
|
446 | 447 | similar meanings as those of the ``getattr_request`` case, but for writing. |
|
447 | 448 | |
|
448 | 449 | Message type: ``setattr_reply``:: |
|
449 | 450 | |
|
450 | 451 | content = { |
|
451 | 452 | # One of ['ok', 'AttributeError', 'AccessError']. |
|
452 | 453 | 'status' : str, |
|
453 | 454 | } |
|
454 | 455 | |
|
455 | 456 | |
|
456 | 457 | |
|
457 | 458 | Object information |
|
458 | 459 | ------------------ |
|
459 | 460 | |
|
460 | 461 | One of IPython's most used capabilities is the introspection of Python objects |
|
461 | 462 | in the user's namespace, typically invoked via the ``?`` and ``??`` characters |
|
462 | 463 | (which in reality are shorthands for the ``%pinfo`` magic). This is used often |
|
463 | 464 | enough that it warrants an explicit message type, especially because frontends |
|
464 | 465 | may want to get object information in response to user keystrokes (like Tab or |
|
465 | 466 | F1) besides from the user explicitly typing code like ``x??``. |
|
466 | 467 | |
|
467 | 468 | Message type: ``object_info_request``:: |
|
468 | 469 | |
|
469 | 470 | content = { |
|
470 | 471 | # The (possibly dotted) name of the object to be searched in all |
|
471 | 472 | # relevant namespaces |
|
472 | 473 | 'name' : str, |
|
473 | 474 | |
|
474 | 475 | # The level of detail desired. The default (0) is equivalent to typing |
|
475 | 476 | # 'x?' at the prompt, 1 is equivalent to 'x??'. |
|
476 | 477 | 'detail_level' : int, |
|
477 | 478 | } |
|
478 | 479 | |
|
479 | 480 | The returned information will be a dictionary with keys very similar to the |
|
480 | 481 | field names that IPython prints at the terminal. |
|
481 | 482 | |
|
482 | 483 | Message type: ``object_info_reply``:: |
|
483 | 484 | |
|
484 | 485 | content = { |
|
485 | 486 | # The name the object was requested under |
|
486 | 487 | 'name' : str, |
|
487 | 488 | |
|
488 | 489 | # Boolean flag indicating whether the named object was found or not. If |
|
489 | 490 | # it's false, all other fields will be empty. |
|
490 | 491 | 'found' : bool, |
|
491 | 492 | |
|
492 | 493 | # Flags for magics and system aliases |
|
493 | 494 | 'ismagic' : bool, |
|
494 | 495 | 'isalias' : bool, |
|
495 | 496 | |
|
496 | 497 | # The name of the namespace where the object was found ('builtin', |
|
497 | 498 | # 'magics', 'alias', 'interactive', etc.) |
|
498 | 499 | 'namespace' : str, |
|
499 | 500 | |
|
500 | 501 | # The type name will be type.__name__ for normal Python objects, but it |
|
501 | 502 | # can also be a string like 'Magic function' or 'System alias' |
|
502 | 503 | 'type_name' : str, |
|
503 | 504 | |
|
504 | 505 | # The string form of the object, possibly truncated for length if |
|
505 | 506 | # detail_level is 0 |
|
506 | 507 | 'string_form' : str, |
|
507 | 508 | |
|
508 | 509 | # For objects with a __class__ attribute this will be set |
|
509 | 510 | 'base_class' : str, |
|
510 | 511 | |
|
511 | 512 | # For objects with a __len__ attribute this will be set |
|
512 | 513 | 'length' : int, |
|
513 | 514 | |
|
514 | 515 | # If the object is a function, class or method whose file we can find, |
|
515 | 516 | # we give its full path |
|
516 | 517 | 'file' : str, |
|
517 | 518 | |
|
518 | 519 | # For pure Python callable objects, we can reconstruct the object |
|
519 | 520 | # definition line which provides its call signature. For convenience this |
|
520 | 521 | # is returned as a single 'definition' field, but below the raw parts that |
|
521 | 522 | # compose it are also returned as the argspec field. |
|
522 | 523 | 'definition' : str, |
|
523 | 524 | |
|
524 | 525 | # The individual parts that together form the definition string. Clients |
|
525 | 526 | # with rich display capabilities may use this to provide a richer and more |
|
526 | 527 | # precise representation of the definition line (e.g. by highlighting |
|
527 | 528 | # arguments based on the user's cursor position). For non-callable |
|
528 | 529 | # objects, this field is empty. |
|
529 | 530 | 'argspec' : { # The names of all the arguments |
|
530 | 531 | args : list, |
|
531 | 532 | # The name of the varargs (*args), if any |
|
532 | 533 | varargs : str, |
|
533 | 534 | # The name of the varkw (**kw), if any |
|
534 | 535 | varkw : str, |
|
535 | 536 | # The values (as strings) of all default arguments. Note |
|
536 | 537 | # that these must be matched *in reverse* with the 'args' |
|
537 | 538 | # list above, since the first positional args have no default |
|
538 | 539 | # value at all. |
|
539 | 540 | defaults : list, |
|
540 | 541 | }, |
|
541 | 542 | |
|
542 | 543 | # For instances, provide the constructor signature (the definition of |
|
543 | 544 | # the __init__ method): |
|
544 | 545 | 'init_definition' : str, |
|
545 | 546 | |
|
546 | 547 | # Docstrings: for any object (function, method, module, package) with a |
|
547 | 548 | # docstring, we show it. But in addition, we may provide additional |
|
548 | 549 | # docstrings. For example, for instances we will show the constructor |
|
549 | 550 | # and class docstrings as well, if available. |
|
550 | 551 | 'docstring' : str, |
|
551 | 552 | |
|
552 | 553 | # For instances, provide the constructor and class docstrings |
|
553 | 554 | 'init_docstring' : str, |
|
554 | 555 | 'class_docstring' : str, |
|
555 | 556 | |
|
556 | 557 | # If it's a callable object whose call method has a separate docstring and |
|
557 | 558 | # definition line: |
|
558 | 559 | 'call_def' : str, |
|
559 | 560 | 'call_docstring' : str, |
|
560 | 561 | |
|
561 | 562 | # If detail_level was 1, we also try to find the source code that |
|
562 | 563 | # defines the object, if possible. The string 'None' will indicate |
|
563 | 564 | # that no source was found. |
|
564 | 565 | 'source' : str, |
|
565 | 566 | } |
|
566 | 567 | |
|
567 | 568 | |
|
568 | 569 | Complete |
|
569 | 570 | -------- |
|
570 | 571 | |
|
571 | 572 | Message type: ``complete_request``:: |
|
572 | 573 | |
|
573 | 574 | content = { |
|
574 | 575 | # The text to be completed, such as 'a.is' |
|
575 | 576 | 'text' : str, |
|
576 | 577 | |
|
577 | 578 | # The full line, such as 'print a.is'. This allows completers to |
|
578 | 579 | # make decisions that may require information about more than just the |
|
579 | 580 | # current word. |
|
580 | 581 | 'line' : str, |
|
581 | 582 | |
|
582 | 583 | # The entire block of text where the line is. This may be useful in the |
|
583 | 584 | # case of multiline completions where more context may be needed. Note: if |
|
584 | 585 | # in practice this field proves unnecessary, remove it to lighten the |
|
585 | 586 | # messages. |
|
586 | 587 | |
|
587 | 588 | 'block' : str, |
|
588 | 589 | |
|
589 | 590 | # The position of the cursor where the user hit 'TAB' on the line. |
|
590 | 591 | 'cursor_pos' : int, |
|
591 | 592 | } |
|
592 | 593 | |
|
593 | 594 | Message type: ``complete_reply``:: |
|
594 | 595 | |
|
595 | 596 | content = { |
|
596 | 597 | # The list of all matches to the completion request, such as |
|
597 | 598 | # ['a.isalnum', 'a.isalpha'] for the above example. |
|
598 | 599 | 'matches' : list |
|
599 | 600 | } |
|
600 | 601 | |
|
601 | 602 | |
|
602 | 603 | History |
|
603 | 604 | ------- |
|
604 | 605 | |
|
605 | 606 | For clients to explicitly request history from a kernel. The kernel has all |
|
606 | 607 | the actual execution history stored in a single location, so clients can |
|
607 | 608 | request it from the kernel when needed. |
|
608 | 609 | |
|
609 | 610 | Message type: ``history_request``:: |
|
610 | 611 | |
|
611 | 612 | content = { |
|
612 | 613 | |
|
613 | 614 | # If True, also return output history in the resulting dict. |
|
614 | 615 | 'output' : bool, |
|
615 | 616 | |
|
616 | 617 | # If True, return the raw input history, else the transformed input. |
|
617 | 618 | 'raw' : bool, |
|
618 | 619 | |
|
619 | 620 | # So far, this can be 'range', 'tail' or 'search'. |
|
620 | 621 | 'hist_access_type' : str, |
|
621 | 622 | |
|
622 | 623 | # If hist_access_type is 'range', get a range of input cells. session can |
|
623 | 624 | # be a positive session number, or a negative number to count back from |
|
624 | 625 | # the current session. |
|
625 | 626 | 'session' : int, |
|
626 | 627 | # start and stop are line numbers within that session. |
|
627 | 628 | 'start' : int, |
|
628 | 629 | 'stop' : int, |
|
629 | 630 | |
|
630 | 631 | # If hist_access_type is 'tail' or 'search', get the last n cells. |
|
631 | 632 | 'n' : int, |
|
632 | 633 | |
|
633 | 634 | # If hist_access_type is 'search', get cells matching the specified glob |
|
634 | 635 | # pattern (with * and ? as wildcards). |
|
635 | 636 | 'pattern' : str, |
|
636 | 637 | |
|
637 | 638 | # If hist_access_type is 'search' and unique is true, do not |
|
638 | 639 | # include duplicated history. Default is false. |
|
639 | 640 | 'unique' : bool, |
|
640 | 641 | |
|
641 | 642 | } |
|
642 | 643 | |
|
643 | 644 | .. versionadded:: 4.0 |
|
644 | 645 | The key ``unique`` for ``history_request``. |
|
645 | 646 | |
|
646 | 647 | Message type: ``history_reply``:: |
|
647 | 648 | |
|
648 | 649 | content = { |
|
649 | 650 | # A list of 3 tuples, either: |
|
650 | 651 | # (session, line_number, input) or |
|
651 | 652 | # (session, line_number, (input, output)), |
|
652 | 653 | # depending on whether output was False or True, respectively. |
|
653 | 654 | 'history' : list, |
|
654 | 655 | } |
|
655 | 656 | |
|
656 | 657 | |
|
657 | 658 | Connect |
|
658 | 659 | ------- |
|
659 | 660 | |
|
660 | 661 | When a client connects to the request/reply socket of the kernel, it can issue |
|
661 | 662 | a connect request to get basic information about the kernel, such as the ports |
|
662 | 663 | the other ZeroMQ sockets are listening on. This allows clients to only have |
|
663 | 664 | to know about a single port (the shell channel) to connect to a kernel. |
|
664 | 665 | |
|
665 | 666 | Message type: ``connect_request``:: |
|
666 | 667 | |
|
667 | 668 | content = { |
|
668 | 669 | } |
|
669 | 670 | |
|
670 | 671 | Message type: ``connect_reply``:: |
|
671 | 672 | |
|
672 | 673 | content = { |
|
673 | 674 | 'shell_port' : int # The port the shell ROUTER socket is listening on. |
|
674 | 675 | 'iopub_port' : int # The port the PUB socket is listening on. |
|
675 | 676 | 'stdin_port' : int # The port the stdin ROUTER socket is listening on. |
|
676 | 677 | 'hb_port' : int # The port the heartbeat socket is listening on. |
|
677 | 678 | } |
|
678 | 679 | |
|
679 | 680 | |
|
680 | 681 | Kernel info |
|
681 | 682 | ----------- |
|
682 | 683 | |
|
683 | 684 | If a client needs to know what protocol the kernel supports, it can |
|
684 | 685 | ask version number of the messaging protocol supported by the kernel. |
|
685 | 686 | This message can be used to fetch other core information of the |
|
686 | 687 | kernel, including language (e.g., Python), language version number and |
|
687 | 688 | IPython version number. |
|
688 | 689 | |
|
689 | 690 | Message type: ``kernel_info_request``:: |
|
690 | 691 | |
|
691 | 692 | content = { |
|
692 | 693 | } |
|
693 | 694 | |
|
694 | 695 | Message type: ``kernel_info_reply``:: |
|
695 | 696 | |
|
696 | 697 | content = { |
|
697 | 698 | # Version of messaging protocol (mandatory). |
|
698 | 699 | # The first integer indicates major version. It is incremented when |
|
699 | 700 | # there is any backward incompatible change. |
|
700 | 701 | # The second integer indicates minor version. It is incremented when |
|
701 | 702 | # there is any backward compatible change. |
|
702 | 703 | 'protocol_version': [int, int], |
|
703 | 704 | |
|
704 | 705 | # IPython version number (optional). |
|
705 | 706 | # Non-python kernel backend may not have this version number. |
|
706 | 707 | # The last component is an extra field, which may be 'dev' or |
|
707 | 708 | # 'rc1' in development version. It is an empty string for |
|
708 | 709 | # released version. |
|
709 | 710 | 'ipython_version': [int, int, int, str], |
|
710 | 711 | |
|
711 | 712 | # Language version number (mandatory). |
|
712 | 713 | # It is Python version number (e.g., [2, 7, 3]) for the kernel |
|
713 | 714 | # included in IPython. |
|
714 | 715 | 'language_version': [int, ...], |
|
715 | 716 | |
|
716 | 717 | # Programming language in which kernel is implemented (mandatory). |
|
717 | 718 | # Kernel included in IPython returns 'python'. |
|
718 | 719 | 'language': str, |
|
719 | 720 | } |
|
720 | 721 | |
|
721 | 722 | |
|
722 | 723 | Kernel shutdown |
|
723 | 724 | --------------- |
|
724 | 725 | |
|
725 | 726 | The clients can request the kernel to shut itself down; this is used in |
|
726 | 727 | multiple cases: |
|
727 | 728 | |
|
728 | 729 | - when the user chooses to close the client application via a menu or window |
|
729 | 730 | control. |
|
730 | 731 | - when the user types 'exit' or 'quit' (or their uppercase magic equivalents). |
|
731 | 732 | - when the user chooses a GUI method (like the 'Ctrl-C' shortcut in the |
|
732 | 733 | IPythonQt client) to force a kernel restart to get a clean kernel without |
|
733 | 734 | losing client-side state like history or inlined figures. |
|
734 | 735 | |
|
735 | 736 | The client sends a shutdown request to the kernel, and once it receives the |
|
736 | 737 | reply message (which is otherwise empty), it can assume that the kernel has |
|
737 | 738 | completed shutdown safely. |
|
738 | 739 | |
|
739 | 740 | Upon their own shutdown, client applications will typically execute a last |
|
740 | 741 | minute sanity check and forcefully terminate any kernel that is still alive, to |
|
741 | 742 | avoid leaving stray processes in the user's machine. |
|
742 | 743 | |
|
743 | 744 | For both shutdown request and reply, there is no actual content that needs to |
|
744 | 745 | be sent, so the content dict is empty. |
|
745 | 746 | |
|
746 | 747 | Message type: ``shutdown_request``:: |
|
747 | 748 | |
|
748 | 749 | content = { |
|
749 | 750 | 'restart' : bool # whether the shutdown is final, or precedes a restart |
|
750 | 751 | } |
|
751 | 752 | |
|
752 | 753 | Message type: ``shutdown_reply``:: |
|
753 | 754 | |
|
754 | 755 | content = { |
|
755 | 756 | 'restart' : bool # whether the shutdown is final, or precedes a restart |
|
756 | 757 | } |
|
757 | 758 | |
|
758 | 759 | .. Note:: |
|
759 | 760 | |
|
760 | 761 | When the clients detect a dead kernel thanks to inactivity on the heartbeat |
|
761 | 762 | socket, they simply send a forceful process termination signal, since a dead |
|
762 | 763 | process is unlikely to respond in any useful way to messages. |
|
763 | 764 | |
|
764 | 765 | |
|
765 | 766 | Messages on the PUB/SUB socket |
|
766 | 767 | ============================== |
|
767 | 768 | |
|
768 | 769 | Streams (stdout, stderr, etc) |
|
769 | 770 | ------------------------------ |
|
770 | 771 | |
|
771 | 772 | Message type: ``stream``:: |
|
772 | 773 | |
|
773 | 774 | content = { |
|
774 | 775 | # The name of the stream is one of 'stdin', 'stdout', 'stderr' |
|
775 | 776 | 'name' : str, |
|
776 | 777 | |
|
777 | 778 | # The data is an arbitrary string to be written to that stream |
|
778 | 779 | 'data' : str, |
|
779 | 780 | } |
|
780 | 781 | |
|
781 | 782 | When a kernel receives a raw_input call, it should also broadcast it on the pub |
|
782 | 783 | socket with the names 'stdin' and 'stdin_reply'. This will allow other clients |
|
783 | 784 | to monitor/display kernel interactions and possibly replay them to their user |
|
784 | 785 | or otherwise expose them. |
|
785 | 786 | |
|
786 | 787 | Display Data |
|
787 | 788 | ------------ |
|
788 | 789 | |
|
789 | 790 | This type of message is used to bring back data that should be diplayed (text, |
|
790 | 791 | html, svg, etc.) in the frontends. This data is published to all frontends. |
|
791 | 792 | Each message can have multiple representations of the data; it is up to the |
|
792 | 793 | frontend to decide which to use and how. A single message should contain all |
|
793 | 794 | possible representations of the same information. Each representation should |
|
794 | 795 | be a JSON'able data structure, and should be a valid MIME type. |
|
795 | 796 | |
|
796 | 797 | Some questions remain about this design: |
|
797 | 798 | |
|
798 | 799 | * Do we use this message type for pyout/displayhook? Probably not, because |
|
799 | 800 | the displayhook also has to handle the Out prompt display. On the other hand |
|
800 | 801 | we could put that information into the metadata secion. |
|
801 | 802 | |
|
802 | 803 | Message type: ``display_data``:: |
|
803 | 804 | |
|
804 | 805 | content = { |
|
805 | 806 | |
|
806 | 807 | # Who create the data |
|
807 | 808 | 'source' : str, |
|
808 | 809 | |
|
809 | 810 | # The data dict contains key/value pairs, where the kids are MIME |
|
810 | 811 | # types and the values are the raw data of the representation in that |
|
811 | 812 | # format. |
|
812 | 813 | 'data' : dict, |
|
813 | 814 | |
|
814 | 815 | # Any metadata that describes the data |
|
815 | 816 | 'metadata' : dict |
|
816 | 817 | } |
|
817 | 818 | |
|
818 | 819 | |
|
819 | 820 | The ``metadata`` contains any metadata that describes the output. |
|
820 | 821 | Global keys are assumed to apply to the output as a whole. |
|
821 | 822 | The ``metadata`` dict can also contain mime-type keys, which will be sub-dictionaries, |
|
822 | 823 | which are interpreted as applying only to output of that type. |
|
823 | 824 | Third parties should put any data they write into a single dict |
|
824 | 825 | with a reasonably unique name to avoid conflicts. |
|
825 | 826 | |
|
826 | 827 | The only metadata keys currently defined in IPython are the width and height |
|
827 | 828 | of images:: |
|
828 | 829 | |
|
829 | 830 | 'metadata' : { |
|
830 | 831 | 'image/png' : { |
|
831 | 832 | 'width': 640, |
|
832 | 833 | 'height': 480 |
|
833 | 834 | } |
|
834 | 835 | } |
|
835 | 836 | |
|
836 | 837 | |
|
837 | 838 | Raw Data Publication |
|
838 | 839 | -------------------- |
|
839 | 840 | |
|
840 | 841 | ``display_data`` lets you publish *representations* of data, such as images and html. |
|
841 | 842 | This ``data_pub`` message lets you publish *actual raw data*, sent via message buffers. |
|
842 | 843 | |
|
843 | 844 | data_pub messages are constructed via the :func:`IPython.lib.datapub.publish_data` function: |
|
844 | 845 | |
|
845 | 846 | .. sourcecode:: python |
|
846 | 847 | |
|
847 | 848 | from IPython.kernel.zmq.datapub import publish_data |
|
848 | 849 | ns = dict(x=my_array) |
|
849 | 850 | publish_data(ns) |
|
850 | 851 | |
|
851 | 852 | |
|
852 | 853 | Message type: ``data_pub``:: |
|
853 | 854 | |
|
854 | 855 | content = { |
|
855 | 856 | # the keys of the data dict, after it has been unserialized |
|
856 | 857 | keys = ['a', 'b'] |
|
857 | 858 | } |
|
858 | 859 | # the namespace dict will be serialized in the message buffers, |
|
859 | 860 | # which will have a length of at least one |
|
860 | 861 | buffers = ['pdict', ...] |
|
861 | 862 | |
|
862 | 863 | |
|
863 | 864 | The interpretation of a sequence of data_pub messages for a given parent request should be |
|
864 | 865 | to update a single namespace with subsequent results. |
|
865 | 866 | |
|
866 | 867 | .. note:: |
|
867 | 868 | |
|
868 | 869 | No frontends directly handle data_pub messages at this time. |
|
869 | 870 | It is currently only used by the client/engines in :mod:`IPython.parallel`, |
|
870 | 871 | where engines may publish *data* to the Client, |
|
871 | 872 | of which the Client can then publish *representations* via ``display_data`` |
|
872 | 873 | to various frontends. |
|
873 | 874 | |
|
874 | 875 | Python inputs |
|
875 | 876 | ------------- |
|
876 | 877 | |
|
877 | 878 | These messages are the re-broadcast of the ``execute_request``. |
|
878 | 879 | |
|
879 | 880 | Message type: ``pyin``:: |
|
880 | 881 | |
|
881 | 882 | content = { |
|
882 | 883 | 'code' : str, # Source code to be executed, one or more lines |
|
883 | 884 | |
|
884 | 885 | # The counter for this execution is also provided so that clients can |
|
885 | 886 | # display it, since IPython automatically creates variables called _iN |
|
886 | 887 | # (for input prompt In[N]). |
|
887 | 888 | 'execution_count' : int |
|
888 | 889 | } |
|
889 | 890 | |
|
890 | 891 | Python outputs |
|
891 | 892 | -------------- |
|
892 | 893 | |
|
893 | 894 | When Python produces output from code that has been compiled in with the |
|
894 | 895 | 'single' flag to :func:`compile`, any expression that produces a value (such as |
|
895 | 896 | ``1+1``) is passed to ``sys.displayhook``, which is a callable that can do with |
|
896 | 897 | this value whatever it wants. The default behavior of ``sys.displayhook`` in |
|
897 | 898 | the Python interactive prompt is to print to ``sys.stdout`` the :func:`repr` of |
|
898 | 899 | the value as long as it is not ``None`` (which isn't printed at all). In our |
|
899 | 900 | case, the kernel instantiates as ``sys.displayhook`` an object which has |
|
900 | 901 | similar behavior, but which instead of printing to stdout, broadcasts these |
|
901 | 902 | values as ``pyout`` messages for clients to display appropriately. |
|
902 | 903 | |
|
903 | 904 | IPython's displayhook can handle multiple simultaneous formats depending on its |
|
904 | 905 | configuration. The default pretty-printed repr text is always given with the |
|
905 | 906 | ``data`` entry in this message. Any other formats are provided in the |
|
906 | 907 | ``extra_formats`` list. Frontends are free to display any or all of these |
|
907 | 908 | according to its capabilities. ``extra_formats`` list contains 3-tuples of an ID |
|
908 | 909 | string, a type string, and the data. The ID is unique to the formatter |
|
909 | 910 | implementation that created the data. Frontends will typically ignore the ID |
|
910 | 911 | unless if it has requested a particular formatter. The type string tells the |
|
911 | 912 | frontend how to interpret the data. It is often, but not always a MIME type. |
|
912 | 913 | Frontends should ignore types that it does not understand. The data itself is |
|
913 | 914 | any JSON object and depends on the format. It is often, but not always a string. |
|
914 | 915 | |
|
915 | 916 | Message type: ``pyout``:: |
|
916 | 917 | |
|
917 | 918 | content = { |
|
918 | 919 | |
|
919 | 920 | # The counter for this execution is also provided so that clients can |
|
920 | 921 | # display it, since IPython automatically creates variables called _N |
|
921 | 922 | # (for prompt N). |
|
922 | 923 | 'execution_count' : int, |
|
923 | 924 | |
|
924 | 925 | # The data dict contains key/value pairs, where the kids are MIME |
|
925 | 926 | # types and the values are the raw data of the representation in that |
|
926 | 927 | # format. The data dict must minimally contain the ``text/plain`` |
|
927 | 928 | # MIME type which is used as a backup representation. |
|
928 | 929 | 'data' : dict, |
|
929 | 930 | |
|
930 | 931 | } |
|
931 | 932 | |
|
932 | 933 | Python errors |
|
933 | 934 | ------------- |
|
934 | 935 | |
|
935 | 936 | When an error occurs during code execution |
|
936 | 937 | |
|
937 | 938 | Message type: ``pyerr``:: |
|
938 | 939 | |
|
939 | 940 | content = { |
|
940 | 941 | # Similar content to the execute_reply messages for the 'error' case, |
|
941 | 942 | # except the 'status' field is omitted. |
|
942 | 943 | } |
|
943 | 944 | |
|
944 | 945 | Kernel status |
|
945 | 946 | ------------- |
|
946 | 947 | |
|
947 | 948 | This message type is used by frontends to monitor the status of the kernel. |
|
948 | 949 | |
|
949 | 950 | Message type: ``status``:: |
|
950 | 951 | |
|
951 | 952 | content = { |
|
952 | 953 | # When the kernel starts to execute code, it will enter the 'busy' |
|
953 | 954 | # state and when it finishes, it will enter the 'idle' state. |
|
954 | 955 | # The kernel will publish state 'starting' exactly once at process startup. |
|
955 | 956 | execution_state : ('busy', 'idle', 'starting') |
|
956 | 957 | } |
|
957 | 958 | |
|
958 | 959 | Kernel crashes |
|
959 | 960 | -------------- |
|
960 | 961 | |
|
961 | 962 | When the kernel has an unexpected exception, caught by the last-resort |
|
962 | 963 | sys.excepthook, we should broadcast the crash handler's output before exiting. |
|
963 | 964 | This will allow clients to notice that a kernel died, inform the user and |
|
964 | 965 | propose further actions. |
|
965 | 966 | |
|
966 | 967 | Message type: ``crash``:: |
|
967 | 968 | |
|
968 | 969 | content = { |
|
969 | 970 | # Similarly to the 'error' case for execute_reply messages, this will |
|
970 | 971 | # contain ename, evalue and traceback fields. |
|
971 | 972 | |
|
972 | 973 | # An additional field with supplementary information such as where to |
|
973 | 974 | # send the crash message |
|
974 | 975 | 'info' : str, |
|
975 | 976 | } |
|
976 | 977 | |
|
977 | 978 | |
|
978 | 979 | Future ideas |
|
979 | 980 | ------------ |
|
980 | 981 | |
|
981 | 982 | Other potential message types, currently unimplemented, listed below as ideas. |
|
982 | 983 | |
|
983 | 984 | Message type: ``file``:: |
|
984 | 985 | |
|
985 | 986 | content = { |
|
986 | 987 | 'path' : 'cool.jpg', |
|
987 | 988 | 'mimetype' : str, |
|
988 | 989 | 'data' : str, |
|
989 | 990 | } |
|
990 | 991 | |
|
991 | 992 | |
|
992 | 993 | Messages on the stdin ROUTER/DEALER sockets |
|
993 | 994 | =========================================== |
|
994 | 995 | |
|
995 | 996 | This is a socket where the request/reply pattern goes in the opposite direction: |
|
996 | 997 | from the kernel to a *single* frontend, and its purpose is to allow |
|
997 | 998 | ``raw_input`` and similar operations that read from ``sys.stdin`` on the kernel |
|
998 | 999 | to be fulfilled by the client. The request should be made to the frontend that |
|
999 | 1000 | made the execution request that prompted ``raw_input`` to be called. For now we |
|
1000 | 1001 | will keep these messages as simple as possible, since they only mean to convey |
|
1001 | 1002 | the ``raw_input(prompt)`` call. |
|
1002 | 1003 | |
|
1003 | 1004 | Message type: ``input_request``:: |
|
1004 | 1005 | |
|
1005 | 1006 | content = { 'prompt' : str } |
|
1006 | 1007 | |
|
1007 | 1008 | Message type: ``input_reply``:: |
|
1008 | 1009 | |
|
1009 | 1010 | content = { 'value' : str } |
|
1010 | 1011 | |
|
1011 | 1012 | .. Note:: |
|
1012 | 1013 | |
|
1013 | 1014 | We do not explicitly try to forward the raw ``sys.stdin`` object, because in |
|
1014 | 1015 | practice the kernel should behave like an interactive program. When a |
|
1015 | 1016 | program is opened on the console, the keyboard effectively takes over the |
|
1016 | 1017 | ``stdin`` file descriptor, and it can't be used for raw reading anymore. |
|
1017 | 1018 | Since the IPython kernel effectively behaves like a console program (albeit |
|
1018 | 1019 | one whose "keyboard" is actually living in a separate process and |
|
1019 | 1020 | transported over the zmq connection), raw ``stdin`` isn't expected to be |
|
1020 | 1021 | available. |
|
1021 | 1022 | |
|
1022 | 1023 | |
|
1023 | 1024 | Heartbeat for kernels |
|
1024 | 1025 | ===================== |
|
1025 | 1026 | |
|
1026 | 1027 | Initially we had considered using messages like those above over ZMQ for a |
|
1027 | 1028 | kernel 'heartbeat' (a way to detect quickly and reliably whether a kernel is |
|
1028 | 1029 | alive at all, even if it may be busy executing user code). But this has the |
|
1029 | 1030 | problem that if the kernel is locked inside extension code, it wouldn't execute |
|
1030 | 1031 | the python heartbeat code. But it turns out that we can implement a basic |
|
1031 | 1032 | heartbeat with pure ZMQ, without using any Python messaging at all. |
|
1032 | 1033 | |
|
1033 | 1034 | The monitor sends out a single zmq message (right now, it is a str of the |
|
1034 | 1035 | monitor's lifetime in seconds), and gets the same message right back, prefixed |
|
1035 | 1036 | with the zmq identity of the DEALER socket in the heartbeat process. This can be |
|
1036 | 1037 | a uuid, or even a full message, but there doesn't seem to be a need for packing |
|
1037 | 1038 | up a message when the sender and receiver are the exact same Python object. |
|
1038 | 1039 | |
|
1039 | 1040 | The model is this:: |
|
1040 | 1041 | |
|
1041 | 1042 | monitor.send(str(self.lifetime)) # '1.2345678910' |
|
1042 | 1043 | |
|
1043 | 1044 | and the monitor receives some number of messages of the form:: |
|
1044 | 1045 | |
|
1045 | 1046 | ['uuid-abcd-dead-beef', '1.2345678910'] |
|
1046 | 1047 | |
|
1047 | 1048 | where the first part is the zmq.IDENTITY of the heart's DEALER on the engine, and |
|
1048 | 1049 | the rest is the message sent by the monitor. No Python code ever has any |
|
1049 | 1050 | access to the message between the monitor's send, and the monitor's recv. |
|
1050 | 1051 | |
|
1051 | 1052 | |
|
1052 | 1053 | ToDo |
|
1053 | 1054 | ==== |
|
1054 | 1055 | |
|
1055 | 1056 | Missing things include: |
|
1056 | 1057 | |
|
1057 | 1058 | * Important: finish thinking through the payload concept and API. |
|
1058 | 1059 | |
|
1059 | 1060 | * Important: ensure that we have a good solution for magics like %edit. It's |
|
1060 | 1061 | likely that with the payload concept we can build a full solution, but not |
|
1061 | 1062 | 100% clear yet. |
|
1062 | 1063 | |
|
1063 | 1064 | * Finishing the details of the heartbeat protocol. |
|
1064 | 1065 | |
|
1065 | 1066 | * Signal handling: specify what kind of information kernel should broadcast (or |
|
1066 | 1067 | not) when it receives signals. |
|
1067 | 1068 | |
|
1068 | 1069 | .. include:: ../links.rst |
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