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@@ -1,487 +1,486 b'' | |||
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1 | 1 | """A ZMQ-based subclass of InteractiveShell. |
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2 | 2 | |
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3 | 3 | This code is meant to ease the refactoring of the base InteractiveShell into |
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4 | 4 | something with a cleaner architecture for 2-process use, without actually |
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5 | 5 | breaking InteractiveShell itself. So we're doing something a bit ugly, where |
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6 | 6 | we subclass and override what we want to fix. Once this is working well, we |
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7 | 7 | can go back to the base class and refactor the code for a cleaner inheritance |
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8 | 8 | implementation that doesn't rely on so much monkeypatching. |
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9 | 9 | |
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10 | 10 | But this lets us maintain a fully working IPython as we develop the new |
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11 | 11 | machinery. This should thus be thought of as scaffolding. |
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12 | 12 | """ |
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13 | 13 | |
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14 | 14 | # Copyright (c) IPython Development Team. |
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15 | 15 | # Distributed under the terms of the Modified BSD License. |
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16 | 16 | |
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17 | 17 | from __future__ import print_function |
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18 | 18 | |
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19 | 19 | import os |
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20 | 20 | import sys |
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21 | 21 | import time |
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22 | 22 | |
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23 | 23 | from zmq.eventloop import ioloop |
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24 | 24 | |
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25 | 25 | from IPython.core.interactiveshell import ( |
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26 | 26 | InteractiveShell, InteractiveShellABC |
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27 | 27 | ) |
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28 | 28 | from IPython.core import page |
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29 | 29 | from IPython.core.autocall import ZMQExitAutocall |
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30 | 30 | from IPython.core.displaypub import DisplayPublisher |
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31 | 31 | from IPython.core.error import UsageError |
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32 | 32 | from IPython.core.magics import MacroToEdit, CodeMagics |
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33 | 33 | from IPython.core.magic import magics_class, line_magic, Magics |
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34 | 34 | from IPython.core import payloadpage |
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35 | 35 | from IPython.core.usage import default_gui_banner |
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36 | 36 | from IPython.display import display, Javascript |
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37 | 37 | from IPython.kernel.inprocess.socket import SocketABC |
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38 | 38 | from IPython.kernel import ( |
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39 | 39 | get_connection_file, get_connection_info, connect_qtconsole |
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40 | 40 | ) |
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41 | 41 | from IPython.testing.skipdoctest import skip_doctest |
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42 | 42 | from IPython.utils import openpy |
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43 | 43 | from IPython.utils.jsonutil import json_clean, encode_images |
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44 | 44 | from IPython.utils.process import arg_split |
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45 | 45 | from IPython.utils import py3compat |
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46 | 46 | from IPython.utils.py3compat import unicode_type |
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47 | 47 | from IPython.utils.traitlets import Instance, Type, Dict, CBool, CBytes, Any |
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48 | 48 | from IPython.utils.warn import error |
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49 | 49 | from IPython.kernel.zmq.displayhook import ZMQShellDisplayHook |
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50 | 50 | from IPython.kernel.zmq.datapub import ZMQDataPublisher |
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51 | 51 | from IPython.kernel.zmq.session import extract_header |
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52 | 52 | from .session import Session |
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53 | 53 | |
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54 | 54 | #----------------------------------------------------------------------------- |
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55 | 55 | # Functions and classes |
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56 | 56 | #----------------------------------------------------------------------------- |
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57 | 57 | |
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58 | 58 | class ZMQDisplayPublisher(DisplayPublisher): |
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59 | 59 | """A display publisher that publishes data using a ZeroMQ PUB socket.""" |
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60 | 60 | |
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61 | 61 | session = Instance(Session) |
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62 | 62 | pub_socket = Instance(SocketABC) |
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63 | 63 | parent_header = Dict({}) |
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64 | 64 | topic = CBytes(b'display_data') |
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65 | 65 | |
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66 | 66 | def set_parent(self, parent): |
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67 | 67 | """Set the parent for outbound messages.""" |
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68 | 68 | self.parent_header = extract_header(parent) |
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69 | 69 | |
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70 | 70 | def _flush_streams(self): |
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71 | 71 | """flush IO Streams prior to display""" |
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72 | 72 | sys.stdout.flush() |
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73 | 73 | sys.stderr.flush() |
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74 | 74 | |
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75 | 75 | def publish(self, data, metadata=None, source=None): |
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76 | 76 | self._flush_streams() |
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77 | 77 | if metadata is None: |
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78 | 78 | metadata = {} |
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79 | 79 | self._validate_data(data, metadata) |
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80 | 80 | content = {} |
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81 | 81 | content['data'] = encode_images(data) |
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82 | 82 | content['metadata'] = metadata |
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83 | 83 | self.session.send( |
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84 | 84 | self.pub_socket, u'display_data', json_clean(content), |
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85 | 85 | parent=self.parent_header, ident=self.topic, |
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86 | 86 | ) |
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87 | 87 | |
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88 | 88 | def clear_output(self, wait=False): |
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89 | 89 | content = dict(wait=wait) |
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90 | 90 | self._flush_streams() |
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91 | 91 | self.session.send( |
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92 | 92 | self.pub_socket, u'clear_output', content, |
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93 | 93 | parent=self.parent_header, ident=self.topic, |
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94 | 94 | ) |
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95 | 95 | |
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96 | 96 | @magics_class |
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97 | 97 | class KernelMagics(Magics): |
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98 | 98 | #------------------------------------------------------------------------ |
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99 | 99 | # Magic overrides |
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100 | 100 | #------------------------------------------------------------------------ |
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101 | 101 | # Once the base class stops inheriting from magic, this code needs to be |
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102 | 102 | # moved into a separate machinery as well. For now, at least isolate here |
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103 | 103 | # the magics which this class needs to implement differently from the base |
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104 | 104 | # class, or that are unique to it. |
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105 | 105 | |
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106 | 106 | _find_edit_target = CodeMagics._find_edit_target |
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107 | 107 | |
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108 | 108 | @skip_doctest |
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109 | 109 | @line_magic |
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110 | 110 | def edit(self, parameter_s='', last_call=['','']): |
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111 | 111 | """Bring up an editor and execute the resulting code. |
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112 | 112 | |
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113 | 113 | Usage: |
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114 | 114 | %edit [options] [args] |
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115 | 115 | |
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116 | 116 | %edit runs an external text editor. You will need to set the command for |
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117 | 117 | this editor via the ``TerminalInteractiveShell.editor`` option in your |
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118 | 118 | configuration file before it will work. |
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119 | 119 | |
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120 | 120 | This command allows you to conveniently edit multi-line code right in |
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121 | 121 | your IPython session. |
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122 | 122 | |
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123 | 123 | If called without arguments, %edit opens up an empty editor with a |
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124 | 124 | temporary file and will execute the contents of this file when you |
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125 | 125 | close it (don't forget to save it!). |
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126 | 126 | |
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127 | 127 | Options: |
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128 | 128 | |
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129 | 129 | -n <number> |
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130 | 130 | Open the editor at a specified line number. By default, the IPython |
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131 | 131 | editor hook uses the unix syntax 'editor +N filename', but you can |
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132 | 132 | configure this by providing your own modified hook if your favorite |
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133 | 133 | editor supports line-number specifications with a different syntax. |
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134 | 134 | |
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135 | 135 | -p |
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136 | 136 | Call the editor with the same data as the previous time it was used, |
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137 | 137 | regardless of how long ago (in your current session) it was. |
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138 | 138 | |
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139 | 139 | -r |
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140 | 140 | Use 'raw' input. This option only applies to input taken from the |
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141 | 141 | user's history. By default, the 'processed' history is used, so that |
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142 | 142 | magics are loaded in their transformed version to valid Python. If |
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143 | 143 | this option is given, the raw input as typed as the command line is |
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144 | 144 | used instead. When you exit the editor, it will be executed by |
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145 | 145 | IPython's own processor. |
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146 | 146 | |
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147 | 147 | Arguments: |
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148 | 148 | |
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149 | 149 | If arguments are given, the following possibilites exist: |
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150 | 150 | |
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151 | 151 | - The arguments are numbers or pairs of colon-separated numbers (like |
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152 | 152 | 1 4:8 9). These are interpreted as lines of previous input to be |
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153 | 153 | loaded into the editor. The syntax is the same of the %macro command. |
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154 | 154 | |
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155 | 155 | - If the argument doesn't start with a number, it is evaluated as a |
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156 | 156 | variable and its contents loaded into the editor. You can thus edit |
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157 | 157 | any string which contains python code (including the result of |
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158 | 158 | previous edits). |
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159 | 159 | |
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160 | 160 | - If the argument is the name of an object (other than a string), |
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161 | 161 | IPython will try to locate the file where it was defined and open the |
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162 | 162 | editor at the point where it is defined. You can use ``%edit function`` |
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163 | 163 | to load an editor exactly at the point where 'function' is defined, |
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164 | 164 | edit it and have the file be executed automatically. |
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165 | 165 | |
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166 | 166 | If the object is a macro (see %macro for details), this opens up your |
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167 | 167 | specified editor with a temporary file containing the macro's data. |
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168 | 168 | Upon exit, the macro is reloaded with the contents of the file. |
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169 | 169 | |
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170 | 170 | Note: opening at an exact line is only supported under Unix, and some |
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171 | 171 | editors (like kedit and gedit up to Gnome 2.8) do not understand the |
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172 | 172 | '+NUMBER' parameter necessary for this feature. Good editors like |
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173 | 173 | (X)Emacs, vi, jed, pico and joe all do. |
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174 | 174 | |
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175 | 175 | - If the argument is not found as a variable, IPython will look for a |
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176 | 176 | file with that name (adding .py if necessary) and load it into the |
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177 | 177 | editor. It will execute its contents with execfile() when you exit, |
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178 | 178 | loading any code in the file into your interactive namespace. |
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179 | 179 | |
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180 | 180 | Unlike in the terminal, this is designed to use a GUI editor, and we do |
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181 | 181 | not know when it has closed. So the file you edit will not be |
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182 | 182 | automatically executed or printed. |
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183 | 183 | |
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184 | 184 | Note that %edit is also available through the alias %ed. |
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185 | 185 | """ |
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186 | 186 | |
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187 | 187 | opts,args = self.parse_options(parameter_s,'prn:') |
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188 | 188 | |
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189 | 189 | try: |
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190 | 190 | filename, lineno, _ = CodeMagics._find_edit_target(self.shell, args, opts, last_call) |
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191 | 191 | except MacroToEdit as e: |
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192 | 192 | # TODO: Implement macro editing over 2 processes. |
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193 | 193 | print("Macro editing not yet implemented in 2-process model.") |
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194 | 194 | return |
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195 | 195 | |
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196 | 196 | # Make sure we send to the client an absolute path, in case the working |
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197 | 197 | # directory of client and kernel don't match |
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198 | 198 | filename = os.path.abspath(filename) |
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199 | 199 | |
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200 | 200 | payload = { |
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201 | 201 | 'source' : 'edit_magic', |
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202 | 202 | 'filename' : filename, |
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203 | 203 | 'line_number' : lineno |
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204 | 204 | } |
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205 | 205 | self.shell.payload_manager.write_payload(payload) |
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206 | 206 | |
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207 | 207 | # A few magics that are adapted to the specifics of using pexpect and a |
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208 | 208 | # remote terminal |
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209 | 209 | |
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210 | 210 | @line_magic |
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211 | 211 | def clear(self, arg_s): |
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212 | 212 | """Clear the terminal.""" |
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213 | 213 | if os.name == 'posix': |
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214 | 214 | self.shell.system("clear") |
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215 | 215 | else: |
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216 | 216 | self.shell.system("cls") |
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217 | 217 | |
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218 | 218 | if os.name == 'nt': |
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219 | 219 | # This is the usual name in windows |
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220 | 220 | cls = line_magic('cls')(clear) |
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221 | 221 | |
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222 | 222 | # Terminal pagers won't work over pexpect, but we do have our own pager |
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223 | 223 | |
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224 | 224 | @line_magic |
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225 | 225 | def less(self, arg_s): |
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226 | 226 | """Show a file through the pager. |
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227 | 227 | |
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228 | 228 | Files ending in .py are syntax-highlighted.""" |
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229 | 229 | if not arg_s: |
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230 | 230 | raise UsageError('Missing filename.') |
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231 | 231 | |
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232 | cont = open(arg_s).read() | |
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233 | 232 | if arg_s.endswith('.py'): |
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234 | 233 | cont = self.shell.pycolorize(openpy.read_py_file(arg_s, skip_encoding_cookie=False)) |
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235 | 234 | else: |
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236 | 235 | cont = open(arg_s).read() |
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237 | 236 | page.page(cont) |
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238 | 237 | |
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239 | 238 | more = line_magic('more')(less) |
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240 | 239 | |
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241 | 240 | # Man calls a pager, so we also need to redefine it |
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242 | 241 | if os.name == 'posix': |
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243 | 242 | @line_magic |
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244 | 243 | def man(self, arg_s): |
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245 | 244 | """Find the man page for the given command and display in pager.""" |
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246 | 245 | page.page(self.shell.getoutput('man %s | col -b' % arg_s, |
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247 | 246 | split=False)) |
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248 | 247 | |
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249 | 248 | @line_magic |
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250 | 249 | def connect_info(self, arg_s): |
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251 | 250 | """Print information for connecting other clients to this kernel |
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252 | 251 | |
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253 | 252 | It will print the contents of this session's connection file, as well as |
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254 | 253 | shortcuts for local clients. |
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255 | 254 | |
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256 | 255 | In the simplest case, when called from the most recently launched kernel, |
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257 | 256 | secondary clients can be connected, simply with: |
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258 | 257 | |
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259 | 258 | $> ipython <app> --existing |
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260 | 259 | |
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261 | 260 | """ |
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262 | 261 | |
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263 | 262 | from IPython.core.application import BaseIPythonApplication as BaseIPApp |
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264 | 263 | |
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265 | 264 | if BaseIPApp.initialized(): |
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266 | 265 | app = BaseIPApp.instance() |
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267 | 266 | security_dir = app.profile_dir.security_dir |
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268 | 267 | profile = app.profile |
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269 | 268 | else: |
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270 | 269 | profile = 'default' |
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271 | 270 | security_dir = '' |
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272 | 271 | |
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273 | 272 | try: |
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274 | 273 | connection_file = get_connection_file() |
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275 | 274 | info = get_connection_info(unpack=False) |
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276 | 275 | except Exception as e: |
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277 | 276 | error("Could not get connection info: %r" % e) |
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278 | 277 | return |
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279 | 278 | |
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280 | 279 | # add profile flag for non-default profile |
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281 | 280 | profile_flag = "--profile %s" % profile if profile != 'default' else "" |
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282 | 281 | |
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283 | 282 | # if it's in the security dir, truncate to basename |
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284 | 283 | if security_dir == os.path.dirname(connection_file): |
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285 | 284 | connection_file = os.path.basename(connection_file) |
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286 | 285 | |
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287 | 286 | |
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288 | 287 | print (info + '\n') |
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289 | 288 | print ("Paste the above JSON into a file, and connect with:\n" |
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290 | 289 | " $> ipython <app> --existing <file>\n" |
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291 | 290 | "or, if you are local, you can connect with just:\n" |
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292 | 291 | " $> ipython <app> --existing {0} {1}\n" |
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293 | 292 | "or even just:\n" |
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294 | 293 | " $> ipython <app> --existing {1}\n" |
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295 | 294 | "if this is the most recent IPython session you have started.".format( |
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296 | 295 | connection_file, profile_flag |
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297 | 296 | ) |
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298 | 297 | ) |
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299 | 298 | |
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300 | 299 | @line_magic |
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301 | 300 | def qtconsole(self, arg_s): |
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302 | 301 | """Open a qtconsole connected to this kernel. |
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303 | 302 | |
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304 | 303 | Useful for connecting a qtconsole to running notebooks, for better |
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305 | 304 | debugging. |
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306 | 305 | """ |
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307 | 306 | |
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308 | 307 | # %qtconsole should imply bind_kernel for engines: |
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309 | 308 | try: |
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310 | 309 | from IPython.parallel import bind_kernel |
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311 | 310 | except ImportError: |
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312 | 311 | # technically possible, because parallel has higher pyzmq min-version |
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313 | 312 | pass |
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314 | 313 | else: |
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315 | 314 | bind_kernel() |
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316 | 315 | |
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317 | 316 | try: |
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318 | 317 | p = connect_qtconsole(argv=arg_split(arg_s, os.name=='posix')) |
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319 | 318 | except Exception as e: |
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320 | 319 | error("Could not start qtconsole: %r" % e) |
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321 | 320 | return |
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322 | 321 | |
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323 | 322 | @line_magic |
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324 | 323 | def autosave(self, arg_s): |
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325 | 324 | """Set the autosave interval in the notebook (in seconds). |
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326 | 325 | |
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327 | 326 | The default value is 120, or two minutes. |
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328 | 327 | ``%autosave 0`` will disable autosave. |
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329 | 328 | |
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330 | 329 | This magic only has an effect when called from the notebook interface. |
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331 | 330 | It has no effect when called in a startup file. |
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332 | 331 | """ |
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333 | 332 | |
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334 | 333 | try: |
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335 | 334 | interval = int(arg_s) |
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336 | 335 | except ValueError: |
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337 | 336 | raise UsageError("%%autosave requires an integer, got %r" % arg_s) |
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338 | 337 | |
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339 | 338 | # javascript wants milliseconds |
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340 | 339 | milliseconds = 1000 * interval |
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341 | 340 | display(Javascript("IPython.notebook.set_autosave_interval(%i)" % milliseconds), |
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342 | 341 | include=['application/javascript'] |
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343 | 342 | ) |
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344 | 343 | if interval: |
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345 | 344 | print("Autosaving every %i seconds" % interval) |
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346 | 345 | else: |
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347 | 346 | print("Autosave disabled") |
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348 | 347 | |
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349 | 348 | |
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350 | 349 | class ZMQInteractiveShell(InteractiveShell): |
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351 | 350 | """A subclass of InteractiveShell for ZMQ.""" |
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352 | 351 | |
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353 | 352 | displayhook_class = Type(ZMQShellDisplayHook) |
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354 | 353 | display_pub_class = Type(ZMQDisplayPublisher) |
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355 | 354 | data_pub_class = Type(ZMQDataPublisher) |
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356 | 355 | kernel = Any() |
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357 | 356 | parent_header = Any() |
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358 | 357 | |
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359 | 358 | def _banner1_default(self): |
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360 | 359 | return default_gui_banner |
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361 | 360 | |
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362 | 361 | # Override the traitlet in the parent class, because there's no point using |
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363 | 362 | # readline for the kernel. Can be removed when the readline code is moved |
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364 | 363 | # to the terminal frontend. |
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365 | 364 | colors_force = CBool(True) |
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366 | 365 | readline_use = CBool(False) |
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367 | 366 | # autoindent has no meaning in a zmqshell, and attempting to enable it |
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368 | 367 | # will print a warning in the absence of readline. |
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369 | 368 | autoindent = CBool(False) |
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370 | 369 | |
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371 | 370 | exiter = Instance(ZMQExitAutocall) |
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372 | 371 | def _exiter_default(self): |
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373 | 372 | return ZMQExitAutocall(self) |
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374 | 373 | |
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375 | 374 | def _exit_now_changed(self, name, old, new): |
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376 | 375 | """stop eventloop when exit_now fires""" |
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377 | 376 | if new: |
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378 | 377 | loop = ioloop.IOLoop.instance() |
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379 | 378 | loop.add_timeout(time.time()+0.1, loop.stop) |
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380 | 379 | |
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381 | 380 | keepkernel_on_exit = None |
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382 | 381 | |
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383 | 382 | # Over ZeroMQ, GUI control isn't done with PyOS_InputHook as there is no |
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384 | 383 | # interactive input being read; we provide event loop support in ipkernel |
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385 | 384 | @staticmethod |
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386 | 385 | def enable_gui(gui): |
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387 | 386 | from .eventloops import enable_gui as real_enable_gui |
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388 | 387 | try: |
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389 | 388 | real_enable_gui(gui) |
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390 | 389 | except ValueError as e: |
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391 | 390 | raise UsageError("%s" % e) |
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392 | 391 | |
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393 | 392 | def init_environment(self): |
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394 | 393 | """Configure the user's environment.""" |
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395 | 394 | env = os.environ |
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396 | 395 | # These two ensure 'ls' produces nice coloring on BSD-derived systems |
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397 | 396 | env['TERM'] = 'xterm-color' |
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398 | 397 | env['CLICOLOR'] = '1' |
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399 | 398 | # Since normal pagers don't work at all (over pexpect we don't have |
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400 | 399 | # single-key control of the subprocess), try to disable paging in |
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401 | 400 | # subprocesses as much as possible. |
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402 | 401 | env['PAGER'] = 'cat' |
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403 | 402 | env['GIT_PAGER'] = 'cat' |
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404 | 403 | |
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405 | 404 | def init_hooks(self): |
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406 | 405 | super(ZMQInteractiveShell, self).init_hooks() |
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407 | 406 | self.set_hook('show_in_pager', page.as_hook(payloadpage.page), 99) |
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408 | 407 | |
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409 | 408 | def ask_exit(self): |
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410 | 409 | """Engage the exit actions.""" |
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411 | 410 | self.exit_now = (not self.keepkernel_on_exit) |
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412 | 411 | payload = dict( |
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413 | 412 | source='ask_exit', |
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414 | 413 | keepkernel=self.keepkernel_on_exit, |
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415 | 414 | ) |
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416 | 415 | self.payload_manager.write_payload(payload) |
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417 | 416 | |
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418 | 417 | def _showtraceback(self, etype, evalue, stb): |
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419 | 418 | # try to preserve ordering of tracebacks and print statements |
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420 | 419 | sys.stdout.flush() |
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421 | 420 | sys.stderr.flush() |
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422 | 421 | |
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423 | 422 | exc_content = { |
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424 | 423 | u'traceback' : stb, |
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425 | 424 | u'ename' : unicode_type(etype.__name__), |
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426 | 425 | u'evalue' : py3compat.safe_unicode(evalue), |
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427 | 426 | } |
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428 | 427 | |
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429 | 428 | dh = self.displayhook |
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430 | 429 | # Send exception info over pub socket for other clients than the caller |
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431 | 430 | # to pick up |
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432 | 431 | topic = None |
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433 | 432 | if dh.topic: |
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434 | 433 | topic = dh.topic.replace(b'execute_result', b'error') |
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435 | 434 | |
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436 | 435 | exc_msg = dh.session.send(dh.pub_socket, u'error', json_clean(exc_content), dh.parent_header, ident=topic) |
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437 | 436 | |
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438 | 437 | # FIXME - Hack: store exception info in shell object. Right now, the |
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439 | 438 | # caller is reading this info after the fact, we need to fix this logic |
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440 | 439 | # to remove this hack. Even uglier, we need to store the error status |
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441 | 440 | # here, because in the main loop, the logic that sets it is being |
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442 | 441 | # skipped because runlines swallows the exceptions. |
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443 | 442 | exc_content[u'status'] = u'error' |
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444 | 443 | self._reply_content = exc_content |
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445 | 444 | # /FIXME |
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446 | 445 | |
|
447 | 446 | return exc_content |
|
448 | 447 | |
|
449 | 448 | def set_next_input(self, text, replace=False): |
|
450 | 449 | """Send the specified text to the frontend to be presented at the next |
|
451 | 450 | input cell.""" |
|
452 | 451 | payload = dict( |
|
453 | 452 | source='set_next_input', |
|
454 | 453 | text=text, |
|
455 | 454 | replace=replace, |
|
456 | 455 | ) |
|
457 | 456 | self.payload_manager.write_payload(payload) |
|
458 | 457 | |
|
459 | 458 | def set_parent(self, parent): |
|
460 | 459 | """Set the parent header for associating output with its triggering input""" |
|
461 | 460 | self.parent_header = parent |
|
462 | 461 | self.displayhook.set_parent(parent) |
|
463 | 462 | self.display_pub.set_parent(parent) |
|
464 | 463 | self.data_pub.set_parent(parent) |
|
465 | 464 | try: |
|
466 | 465 | sys.stdout.set_parent(parent) |
|
467 | 466 | except AttributeError: |
|
468 | 467 | pass |
|
469 | 468 | try: |
|
470 | 469 | sys.stderr.set_parent(parent) |
|
471 | 470 | except AttributeError: |
|
472 | 471 | pass |
|
473 | 472 | |
|
474 | 473 | def get_parent(self): |
|
475 | 474 | return self.parent_header |
|
476 | 475 | |
|
477 | 476 | #------------------------------------------------------------------------- |
|
478 | 477 | # Things related to magics |
|
479 | 478 | #------------------------------------------------------------------------- |
|
480 | 479 | |
|
481 | 480 | def init_magics(self): |
|
482 | 481 | super(ZMQInteractiveShell, self).init_magics() |
|
483 | 482 | self.register_magics(KernelMagics) |
|
484 | 483 | self.magics_manager.register_alias('ed', 'edit') |
|
485 | 484 | |
|
486 | 485 | |
|
487 | 486 | InteractiveShellABC.register(ZMQInteractiveShell) |
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