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1 | 1 | # -*- coding: utf-8 -*- |
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2 | 2 | """ |
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3 | 3 | ultratb.py -- Spice up your tracebacks! |
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4 | 4 | |
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5 | 5 | * ColorTB |
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6 | 6 | I've always found it a bit hard to visually parse tracebacks in Python. The |
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7 | 7 | ColorTB class is a solution to that problem. It colors the different parts of a |
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8 | 8 | traceback in a manner similar to what you would expect from a syntax-highlighting |
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9 | 9 | text editor. |
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10 | 10 | |
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11 | 11 | Installation instructions for ColorTB: |
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12 | 12 | import sys,ultratb |
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13 | 13 | sys.excepthook = ultratb.ColorTB() |
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14 | 14 | |
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15 | 15 | * VerboseTB |
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16 | 16 | I've also included a port of Ka-Ping Yee's "cgitb.py" that produces all kinds |
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17 | 17 | of useful info when a traceback occurs. Ping originally had it spit out HTML |
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18 | 18 | and intended it for CGI programmers, but why should they have all the fun? I |
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19 | 19 | altered it to spit out colored text to the terminal. It's a bit overwhelming, |
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20 | 20 | but kind of neat, and maybe useful for long-running programs that you believe |
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21 | 21 | are bug-free. If a crash *does* occur in that type of program you want details. |
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22 | 22 | Give it a shot--you'll love it or you'll hate it. |
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23 | 23 | |
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24 | 24 | Note: |
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25 | 25 | |
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26 | 26 | The Verbose mode prints the variables currently visible where the exception |
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27 | 27 | happened (shortening their strings if too long). This can potentially be |
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28 | 28 | very slow, if you happen to have a huge data structure whose string |
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29 | 29 | representation is complex to compute. Your computer may appear to freeze for |
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30 | 30 | a while with cpu usage at 100%. If this occurs, you can cancel the traceback |
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31 | 31 | with Ctrl-C (maybe hitting it more than once). |
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32 | 32 | |
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33 | 33 | If you encounter this kind of situation often, you may want to use the |
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34 | 34 | Verbose_novars mode instead of the regular Verbose, which avoids formatting |
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35 | 35 | variables (but otherwise includes the information and context given by |
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36 | 36 | Verbose). |
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37 | 37 | |
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38 | 38 | |
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39 | 39 | Installation instructions for ColorTB: |
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40 | 40 | import sys,ultratb |
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41 | 41 | sys.excepthook = ultratb.VerboseTB() |
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42 | 42 | |
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43 | 43 | Note: Much of the code in this module was lifted verbatim from the standard |
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44 | 44 | library module 'traceback.py' and Ka-Ping Yee's 'cgitb.py'. |
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45 | 45 | |
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46 | 46 | * Color schemes |
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47 | 47 | The colors are defined in the class TBTools through the use of the |
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48 | 48 | ColorSchemeTable class. Currently the following exist: |
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49 | 49 | |
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50 | 50 | - NoColor: allows all of this module to be used in any terminal (the color |
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51 | 51 | escapes are just dummy blank strings). |
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52 | 52 | |
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53 | 53 | - Linux: is meant to look good in a terminal like the Linux console (black |
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54 | 54 | or very dark background). |
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55 | 55 | |
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56 | 56 | - LightBG: similar to Linux but swaps dark/light colors to be more readable |
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57 | 57 | in light background terminals. |
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58 | 58 | |
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59 | 59 | You can implement other color schemes easily, the syntax is fairly |
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60 | 60 | self-explanatory. Please send back new schemes you develop to the author for |
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61 | 61 | possible inclusion in future releases. |
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62 | 62 | """ |
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63 | 63 | |
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64 | 64 | #***************************************************************************** |
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65 | 65 | # Copyright (C) 2001 Nathaniel Gray <n8gray@caltech.edu> |
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66 | 66 | # Copyright (C) 2001-2004 Fernando Perez <fperez@colorado.edu> |
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67 | 67 | # |
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68 | 68 | # Distributed under the terms of the BSD License. The full license is in |
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69 | 69 | # the file COPYING, distributed as part of this software. |
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70 | 70 | #***************************************************************************** |
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71 | 71 | |
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72 | 72 | from __future__ import with_statement |
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73 | 73 | |
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74 | 74 | import inspect |
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75 | 75 | import keyword |
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76 | 76 | import linecache |
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77 | 77 | import os |
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78 | 78 | import pydoc |
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79 | 79 | import re |
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80 | 80 | import string |
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81 | 81 | import sys |
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82 | 82 | import time |
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83 | 83 | import tokenize |
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84 | 84 | import traceback |
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85 | 85 | import types |
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86 | 86 | |
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87 | 87 | # For purposes of monkeypatching inspect to fix a bug in it. |
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88 | 88 | from inspect import getsourcefile, getfile, getmodule,\ |
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89 | 89 | ismodule, isclass, ismethod, isfunction, istraceback, isframe, iscode |
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90 | 90 | |
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91 | 91 | # IPython's own modules |
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92 | 92 | # Modified pdb which doesn't damage IPython's readline handling |
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93 | 93 | from IPython.utils import PyColorize |
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94 | 94 | from IPython.core import debugger, ipapi |
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95 | 95 | from IPython.core.display_trap import DisplayTrap |
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96 | 96 | from IPython.core.excolors import exception_colors |
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97 | 97 | from IPython.utils.data import uniq_stable |
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98 | 98 | from IPython.utils.io import Term |
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99 | 99 | from IPython.utils.warn import info, error |
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100 | 100 | |
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101 | 101 | # Globals |
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102 | 102 | # amount of space to put line numbers before verbose tracebacks |
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103 | 103 | INDENT_SIZE = 8 |
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104 | 104 | |
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105 | 105 | # Default color scheme. This is used, for example, by the traceback |
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106 | 106 | # formatter. When running in an actual IPython instance, the user's rc.colors |
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107 | 107 | # value is used, but havinga module global makes this functionality available |
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108 | 108 | # to users of ultratb who are NOT running inside ipython. |
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109 | 109 | DEFAULT_SCHEME = 'NoColor' |
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110 | 110 | |
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111 | 111 | #--------------------------------------------------------------------------- |
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112 | 112 | # Code begins |
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113 | 113 | |
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114 | 114 | # Utility functions |
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115 | 115 | def inspect_error(): |
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116 | 116 | """Print a message about internal inspect errors. |
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117 | 117 | |
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118 | 118 | These are unfortunately quite common.""" |
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119 | 119 | |
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120 | 120 | error('Internal Python error in the inspect module.\n' |
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121 | 121 | 'Below is the traceback from this internal error.\n') |
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122 | 122 | |
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123 | 123 | |
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124 | 124 | def findsource(object): |
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125 | 125 | """Return the entire source file and starting line number for an object. |
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126 | 126 | |
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127 | 127 | The argument may be a module, class, method, function, traceback, frame, |
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128 | 128 | or code object. The source code is returned as a list of all the lines |
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129 | 129 | in the file and the line number indexes a line in that list. An IOError |
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130 | 130 | is raised if the source code cannot be retrieved. |
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131 | 131 | |
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132 | 132 | FIXED version with which we monkeypatch the stdlib to work around a bug.""" |
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133 | 133 | |
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134 | 134 | file = getsourcefile(object) or getfile(object) |
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135 | 135 | # If the object is a frame, then trying to get the globals dict from its |
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136 | 136 | # module won't work. Instead, the frame object itself has the globals |
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137 | 137 | # dictionary. |
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138 | 138 | globals_dict = None |
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139 | 139 | if inspect.isframe(object): |
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140 | 140 | # XXX: can this ever be false? |
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141 | 141 | globals_dict = object.f_globals |
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142 | 142 | else: |
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143 | 143 | module = getmodule(object, file) |
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144 | 144 | if module: |
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145 | 145 | globals_dict = module.__dict__ |
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146 | 146 | lines = linecache.getlines(file, globals_dict) |
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147 | 147 | if not lines: |
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148 | 148 | raise IOError('could not get source code') |
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149 | 149 | |
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150 | 150 | if ismodule(object): |
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151 | 151 | return lines, 0 |
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152 | 152 | |
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153 | 153 | if isclass(object): |
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154 | 154 | name = object.__name__ |
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155 | 155 | pat = re.compile(r'^(\s*)class\s*' + name + r'\b') |
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156 | 156 | # make some effort to find the best matching class definition: |
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157 | 157 | # use the one with the least indentation, which is the one |
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158 | 158 | # that's most probably not inside a function definition. |
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159 | 159 | candidates = [] |
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160 | 160 | for i in range(len(lines)): |
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161 | 161 | match = pat.match(lines[i]) |
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162 | 162 | if match: |
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163 | 163 | # if it's at toplevel, it's already the best one |
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164 | 164 | if lines[i][0] == 'c': |
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165 | 165 | return lines, i |
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166 | 166 | # else add whitespace to candidate list |
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167 | 167 | candidates.append((match.group(1), i)) |
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168 | 168 | if candidates: |
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169 | 169 | # this will sort by whitespace, and by line number, |
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170 | 170 | # less whitespace first |
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171 | 171 | candidates.sort() |
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172 | 172 | return lines, candidates[0][1] |
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173 | 173 | else: |
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174 | 174 | raise IOError('could not find class definition') |
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175 | 175 | |
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176 | 176 | if ismethod(object): |
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177 | 177 | object = object.im_func |
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178 | 178 | if isfunction(object): |
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179 | 179 | object = object.func_code |
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180 | 180 | if istraceback(object): |
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181 | 181 | object = object.tb_frame |
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182 | 182 | if isframe(object): |
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183 | 183 | object = object.f_code |
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184 | 184 | if iscode(object): |
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185 | 185 | if not hasattr(object, 'co_firstlineno'): |
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186 | 186 | raise IOError('could not find function definition') |
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187 | 187 | pat = re.compile(r'^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)') |
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188 | 188 | pmatch = pat.match |
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189 | 189 | # fperez - fix: sometimes, co_firstlineno can give a number larger than |
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190 | 190 | # the length of lines, which causes an error. Safeguard against that. |
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191 | 191 | lnum = min(object.co_firstlineno,len(lines))-1 |
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192 | 192 | while lnum > 0: |
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193 | 193 | if pmatch(lines[lnum]): break |
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194 | 194 | lnum -= 1 |
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195 | 195 | |
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196 | 196 | return lines, lnum |
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197 | 197 | raise IOError('could not find code object') |
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198 | 198 | |
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199 | 199 | # Monkeypatch inspect to apply our bugfix. This code only works with py25 |
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200 | 200 | if sys.version_info[:2] >= (2,5): |
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201 | 201 | inspect.findsource = findsource |
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202 | 202 | |
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203 | 203 | def fix_frame_records_filenames(records): |
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204 | 204 | """Try to fix the filenames in each record from inspect.getinnerframes(). |
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205 | 205 | |
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206 | 206 | Particularly, modules loaded from within zip files have useless filenames |
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207 | 207 | attached to their code object, and inspect.getinnerframes() just uses it. |
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208 | 208 | """ |
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209 | 209 | fixed_records = [] |
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210 | 210 | for frame, filename, line_no, func_name, lines, index in records: |
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211 | 211 | # Look inside the frame's globals dictionary for __file__, which should |
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212 | 212 | # be better. |
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213 | 213 | better_fn = frame.f_globals.get('__file__', None) |
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214 | 214 | if isinstance(better_fn, str): |
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215 | 215 | # Check the type just in case someone did something weird with |
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216 | 216 | # __file__. It might also be None if the error occurred during |
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217 | 217 | # import. |
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218 | 218 | filename = better_fn |
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219 | 219 | fixed_records.append((frame, filename, line_no, func_name, lines, index)) |
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220 | 220 | return fixed_records |
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221 | 221 | |
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222 | 222 | |
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223 | 223 | def _fixed_getinnerframes(etb, context=1,tb_offset=0): |
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224 | 224 | import linecache |
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225 | 225 | LNUM_POS, LINES_POS, INDEX_POS = 2, 4, 5 |
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226 | 226 | |
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227 | 227 | records = fix_frame_records_filenames(inspect.getinnerframes(etb, context)) |
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228 | 228 | |
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229 | 229 | # If the error is at the console, don't build any context, since it would |
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230 | 230 | # otherwise produce 5 blank lines printed out (there is no file at the |
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231 | 231 | # console) |
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232 | 232 | rec_check = records[tb_offset:] |
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233 | 233 | try: |
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234 | 234 | rname = rec_check[0][1] |
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235 | 235 | if rname == '<ipython console>' or rname.endswith('<string>'): |
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236 | 236 | return rec_check |
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237 | 237 | except IndexError: |
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238 | 238 | pass |
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239 | 239 | |
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240 | 240 | aux = traceback.extract_tb(etb) |
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241 | 241 | assert len(records) == len(aux) |
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242 | 242 | for i, (file, lnum, _, _) in zip(range(len(records)), aux): |
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243 | 243 | maybeStart = lnum-1 - context//2 |
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244 | 244 | start = max(maybeStart, 0) |
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245 | 245 | end = start + context |
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246 | 246 | lines = linecache.getlines(file)[start:end] |
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247 | 247 | # pad with empty lines if necessary |
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248 | 248 | if maybeStart < 0: |
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249 | 249 | lines = (['\n'] * -maybeStart) + lines |
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250 | 250 | if len(lines) < context: |
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251 | 251 | lines += ['\n'] * (context - len(lines)) |
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252 | 252 | buf = list(records[i]) |
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253 | 253 | buf[LNUM_POS] = lnum |
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254 | 254 | buf[INDEX_POS] = lnum - 1 - start |
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255 | 255 | buf[LINES_POS] = lines |
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256 | 256 | records[i] = tuple(buf) |
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257 | 257 | return records[tb_offset:] |
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258 | 258 | |
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259 | 259 | # Helper function -- largely belongs to VerboseTB, but we need the same |
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260 | 260 | # functionality to produce a pseudo verbose TB for SyntaxErrors, so that they |
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261 | 261 | # can be recognized properly by ipython.el's py-traceback-line-re |
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262 | 262 | # (SyntaxErrors have to be treated specially because they have no traceback) |
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263 | 263 | |
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264 | 264 | _parser = PyColorize.Parser() |
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265 | 265 | |
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266 | 266 | def _format_traceback_lines(lnum, index, lines, Colors, lvals=None,scheme=None): |
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267 | 267 | numbers_width = INDENT_SIZE - 1 |
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268 | 268 | res = [] |
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269 | 269 | i = lnum - index |
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270 | 270 | |
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271 | 271 | # This lets us get fully syntax-highlighted tracebacks. |
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272 | 272 | if scheme is None: |
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273 | 273 | ipinst = ipapi.get() |
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274 | 274 | if ipinst is not None: |
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275 | 275 | scheme = ipinst.colors |
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276 | 276 | else: |
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277 | 277 | scheme = DEFAULT_SCHEME |
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278 | 278 | |
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279 | 279 | _line_format = _parser.format2 |
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280 | 280 | |
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281 | 281 | for line in lines: |
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282 | 282 | new_line, err = _line_format(line,'str',scheme) |
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283 | 283 | if not err: line = new_line |
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284 | 284 | |
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285 | 285 | if i == lnum: |
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286 | 286 | # This is the line with the error |
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287 | 287 | pad = numbers_width - len(str(i)) |
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288 | 288 | if pad >= 3: |
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289 | 289 | marker = '-'*(pad-3) + '-> ' |
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290 | 290 | elif pad == 2: |
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291 | 291 | marker = '> ' |
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292 | 292 | elif pad == 1: |
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293 | 293 | marker = '>' |
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294 | 294 | else: |
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295 | 295 | marker = '' |
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296 | 296 | num = marker + str(i) |
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297 | 297 | line = '%s%s%s %s%s' %(Colors.linenoEm, num, |
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298 | 298 | Colors.line, line, Colors.Normal) |
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299 | 299 | else: |
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300 | 300 | num = '%*s' % (numbers_width,i) |
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301 | 301 | line = '%s%s%s %s' %(Colors.lineno, num, |
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302 | 302 | Colors.Normal, line) |
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303 | 303 | |
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304 | 304 | res.append(line) |
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305 | 305 | if lvals and i == lnum: |
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306 | 306 | res.append(lvals + '\n') |
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307 | 307 | i = i + 1 |
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308 | 308 | return res |
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309 | 309 | |
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310 | 310 | |
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311 | 311 | #--------------------------------------------------------------------------- |
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312 | 312 | # Module classes |
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313 | 313 | class TBTools: |
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314 | 314 | """Basic tools used by all traceback printer classes.""" |
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315 | 315 | |
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316 | 316 | #: Default output stream, can be overridden at call time. A special value |
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317 | 317 | #: of 'stdout' *as a string* can be given to force extraction of sys.stdout |
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318 | 318 | #: at runtime. This allows testing exception printing with doctests, that |
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319 | 319 | #: swap sys.stdout just at execution time. |
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320 | 320 | #: Warning: be VERY careful to set this to one of the Term streams, NEVER |
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321 | 321 | #: directly to sys.stdout/err, because under win32 the Term streams come from |
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322 | 322 | #: pyreadline and know how to handle color correctly, whie stdout/err don't. |
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323 | 323 | out_stream = Term.cerr |
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324 | 324 | |
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325 | 325 | def __init__(self,color_scheme = 'NoColor',call_pdb=False): |
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326 | 326 | # Whether to call the interactive pdb debugger after printing |
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327 | 327 | # tracebacks or not |
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328 | 328 | self.call_pdb = call_pdb |
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329 | 329 | |
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330 | 330 | # Create color table |
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331 | 331 | self.color_scheme_table = exception_colors() |
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332 | 332 | |
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333 | 333 | self.set_colors(color_scheme) |
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334 | 334 | self.old_scheme = color_scheme # save initial value for toggles |
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335 | 335 | |
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336 | 336 | if call_pdb: |
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337 | 337 | self.pdb = debugger.Pdb(self.color_scheme_table.active_scheme_name) |
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338 | 338 | else: |
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339 | 339 | self.pdb = None |
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340 | 340 | |
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341 | 341 | def set_colors(self,*args,**kw): |
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342 | 342 | """Shorthand access to the color table scheme selector method.""" |
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343 | 343 | |
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344 | 344 | # Set own color table |
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345 | 345 | self.color_scheme_table.set_active_scheme(*args,**kw) |
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346 | 346 | # for convenience, set Colors to the active scheme |
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347 | 347 | self.Colors = self.color_scheme_table.active_colors |
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348 | 348 | # Also set colors of debugger |
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349 | 349 | if hasattr(self,'pdb') and self.pdb is not None: |
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350 | 350 | self.pdb.set_colors(*args,**kw) |
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351 | 351 | |
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352 | 352 | def color_toggle(self): |
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353 | 353 | """Toggle between the currently active color scheme and NoColor.""" |
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354 | 354 | |
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355 | 355 | if self.color_scheme_table.active_scheme_name == 'NoColor': |
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356 | 356 | self.color_scheme_table.set_active_scheme(self.old_scheme) |
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357 | 357 | self.Colors = self.color_scheme_table.active_colors |
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358 | 358 | else: |
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359 | 359 | self.old_scheme = self.color_scheme_table.active_scheme_name |
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360 | 360 | self.color_scheme_table.set_active_scheme('NoColor') |
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361 | 361 | self.Colors = self.color_scheme_table.active_colors |
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362 | 362 | |
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363 | 363 | #--------------------------------------------------------------------------- |
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364 | 364 | class ListTB(TBTools): |
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365 | 365 | """Print traceback information from a traceback list, with optional color. |
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366 | 366 | |
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367 | 367 | Calling: requires 3 arguments: |
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368 | 368 | (etype, evalue, elist) |
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369 | 369 | as would be obtained by: |
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370 | 370 | etype, evalue, tb = sys.exc_info() |
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371 | 371 | if tb: |
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372 | 372 | elist = traceback.extract_tb(tb) |
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373 | 373 | else: |
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374 | 374 | elist = None |
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375 | 375 | |
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376 | 376 | It can thus be used by programs which need to process the traceback before |
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377 | 377 | printing (such as console replacements based on the code module from the |
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378 | 378 | standard library). |
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379 | 379 | |
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380 | 380 | Because they are meant to be called without a full traceback (only a |
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381 | 381 | list), instances of this class can't call the interactive pdb debugger.""" |
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382 | 382 | |
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383 | 383 | def __init__(self,color_scheme = 'NoColor'): |
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384 | 384 | TBTools.__init__(self,color_scheme = color_scheme,call_pdb=0) |
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385 | 385 | |
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386 | 386 | def __call__(self, etype, value, elist): |
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387 | 387 | Term.cout.flush() |
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388 |
Term.cerr.write |
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388 | Term.cerr.write(self.text(etype,value,elist)) | |
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389 | Term.cerr.write('\n') | |
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389 | 390 | |
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390 | 391 | def text(self, etype, value, elist, context=5): |
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391 | 392 | """Return a color formatted string with the traceback info. |
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392 | 393 | |
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393 | 394 | Parameters |
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394 | 395 | ---------- |
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395 | 396 | etype : exception type |
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396 | 397 | Type of the exception raised. |
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397 | 398 | |
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398 | 399 | value : object |
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399 | 400 | Data stored in the exception |
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400 | 401 | |
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401 | 402 | elist : list |
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402 | 403 | List of frames, see class docstring for details. |
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403 | 404 | |
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404 | 405 | Returns |
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405 | 406 | ------- |
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406 | 407 | String with formatted exception. |
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407 | 408 | """ |
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408 | 409 | |
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409 | 410 | Colors = self.Colors |
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410 | 411 | out_string = [] |
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411 | 412 | if elist: |
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412 | 413 | out_string.append('Traceback %s(most recent call last)%s:' % |
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413 | 414 | (Colors.normalEm, Colors.Normal) + '\n') |
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414 | 415 | out_string.extend(self._format_list(elist)) |
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415 | 416 | lines = self._format_exception_only(etype, value) |
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416 | 417 | for line in lines[:-1]: |
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417 | 418 | out_string.append(" "+line) |
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418 | 419 | out_string.append(lines[-1]) |
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419 | 420 | return ''.join(out_string) |
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420 | 421 | |
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421 | 422 | def _format_list(self, extracted_list): |
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422 | 423 | """Format a list of traceback entry tuples for printing. |
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423 | 424 | |
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424 | 425 | Given a list of tuples as returned by extract_tb() or |
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425 | 426 | extract_stack(), return a list of strings ready for printing. |
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426 | 427 | Each string in the resulting list corresponds to the item with the |
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427 | 428 | same index in the argument list. Each string ends in a newline; |
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428 | 429 | the strings may contain internal newlines as well, for those items |
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429 | 430 | whose source text line is not None. |
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430 | 431 | |
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431 | 432 | Lifted almost verbatim from traceback.py |
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432 | 433 | """ |
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433 | 434 | |
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434 | 435 | Colors = self.Colors |
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435 | 436 | list = [] |
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436 | 437 | for filename, lineno, name, line in extracted_list[:-1]: |
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437 | 438 | item = ' File %s"%s"%s, line %s%d%s, in %s%s%s\n' % \ |
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438 | 439 | (Colors.filename, filename, Colors.Normal, |
|
439 | 440 | Colors.lineno, lineno, Colors.Normal, |
|
440 | 441 | Colors.name, name, Colors.Normal) |
|
441 | 442 | if line: |
|
442 | 443 | item = item + ' %s\n' % line.strip() |
|
443 | 444 | list.append(item) |
|
444 | 445 | # Emphasize the last entry |
|
445 | 446 | filename, lineno, name, line = extracted_list[-1] |
|
446 | 447 | item = '%s File %s"%s"%s, line %s%d%s, in %s%s%s%s\n' % \ |
|
447 | 448 | (Colors.normalEm, |
|
448 | 449 | Colors.filenameEm, filename, Colors.normalEm, |
|
449 | 450 | Colors.linenoEm, lineno, Colors.normalEm, |
|
450 | 451 | Colors.nameEm, name, Colors.normalEm, |
|
451 | 452 | Colors.Normal) |
|
452 | 453 | if line: |
|
453 | 454 | item = item + '%s %s%s\n' % (Colors.line, line.strip(), |
|
454 | 455 | Colors.Normal) |
|
455 | 456 | list.append(item) |
|
456 | 457 | return list |
|
457 | 458 | |
|
458 | 459 | def _format_exception_only(self, etype, value): |
|
459 | 460 | """Format the exception part of a traceback. |
|
460 | 461 | |
|
461 | 462 | The arguments are the exception type and value such as given by |
|
462 | 463 | sys.exc_info()[:2]. The return value is a list of strings, each ending |
|
463 | 464 | in a newline. Normally, the list contains a single string; however, |
|
464 | 465 | for SyntaxError exceptions, it contains several lines that (when |
|
465 | 466 | printed) display detailed information about where the syntax error |
|
466 | 467 | occurred. The message indicating which exception occurred is the |
|
467 | 468 | always last string in the list. |
|
468 | 469 | |
|
469 | 470 | Also lifted nearly verbatim from traceback.py |
|
470 | 471 | """ |
|
471 | 472 | |
|
472 | 473 | have_filedata = False |
|
473 | 474 | Colors = self.Colors |
|
474 | 475 | list = [] |
|
475 | 476 | try: |
|
476 | 477 | stype = Colors.excName + etype.__name__ + Colors.Normal |
|
477 | 478 | except AttributeError: |
|
478 | 479 | stype = etype # String exceptions don't get special coloring |
|
479 | 480 | if value is None: |
|
480 | 481 | list.append( str(stype) + '\n') |
|
481 | 482 | else: |
|
482 | 483 | if etype is SyntaxError: |
|
483 | 484 | try: |
|
484 | 485 | msg, (filename, lineno, offset, line) = value |
|
485 | 486 | except: |
|
486 | 487 | have_filedata = False |
|
487 | 488 | else: |
|
488 | 489 | have_filedata = True |
|
489 | 490 | #print 'filename is',filename # dbg |
|
490 | 491 | if not filename: filename = "<string>" |
|
491 | 492 | list.append('%s File %s"%s"%s, line %s%d%s\n' % \ |
|
492 | 493 | (Colors.normalEm, |
|
493 | 494 | Colors.filenameEm, filename, Colors.normalEm, |
|
494 | 495 | Colors.linenoEm, lineno, Colors.Normal )) |
|
495 | 496 | if line is not None: |
|
496 | 497 | i = 0 |
|
497 | 498 | while i < len(line) and line[i].isspace(): |
|
498 | 499 | i = i+1 |
|
499 | 500 | list.append('%s %s%s\n' % (Colors.line, |
|
500 | 501 | line.strip(), |
|
501 | 502 | Colors.Normal)) |
|
502 | 503 | if offset is not None: |
|
503 | 504 | s = ' ' |
|
504 | 505 | for c in line[i:offset-1]: |
|
505 | 506 | if c.isspace(): |
|
506 | 507 | s = s + c |
|
507 | 508 | else: |
|
508 | 509 | s = s + ' ' |
|
509 | 510 | list.append('%s%s^%s\n' % (Colors.caret, s, |
|
510 | 511 | Colors.Normal) ) |
|
511 | 512 | value = msg |
|
512 | 513 | s = self._some_str(value) |
|
513 | 514 | if s: |
|
514 | 515 | list.append('%s%s:%s %s\n' % (str(stype), Colors.excName, |
|
515 | 516 | Colors.Normal, s)) |
|
516 | 517 | else: |
|
517 | 518 | list.append('%s\n' % str(stype)) |
|
518 | 519 | |
|
519 | 520 | # sync with user hooks |
|
520 | 521 | if have_filedata: |
|
521 | 522 | ipinst = ipapi.get() |
|
522 | 523 | if ipinst is not None: |
|
523 | 524 | ipinst.hooks.synchronize_with_editor(filename, lineno, 0) |
|
524 | 525 | |
|
525 | 526 | return list |
|
526 | 527 | |
|
527 | 528 | def show_exception_only(self, etype, value): |
|
528 | 529 | """Only print the exception type and message, without a traceback. |
|
529 | 530 | |
|
530 | 531 | Parameters |
|
531 | 532 | ---------- |
|
532 | 533 | etype : exception type |
|
533 | 534 | value : exception value |
|
534 | 535 | """ |
|
535 | 536 | # This method needs to use __call__ from *this* class, not the one from |
|
536 | 537 | # a subclass whose signature or behavior may be different |
|
537 | 538 | Term.cout.flush() |
|
538 | 539 | ostream = sys.stdout if self.out_stream == 'stdout' else Term.cerr |
|
539 | 540 | ostream.write(ListTB.text(self, etype, value, [])) |
|
540 | 541 | ostream.flush() |
|
541 | 542 | |
|
542 | 543 | def _some_str(self, value): |
|
543 | 544 | # Lifted from traceback.py |
|
544 | 545 | try: |
|
545 | 546 | return str(value) |
|
546 | 547 | except: |
|
547 | 548 | return '<unprintable %s object>' % type(value).__name__ |
|
548 | 549 | |
|
549 | 550 | #---------------------------------------------------------------------------- |
|
550 | 551 | class VerboseTB(TBTools): |
|
551 | 552 | """A port of Ka-Ping Yee's cgitb.py module that outputs color text instead |
|
552 | 553 | of HTML. Requires inspect and pydoc. Crazy, man. |
|
553 | 554 | |
|
554 | 555 | Modified version which optionally strips the topmost entries from the |
|
555 | 556 | traceback, to be used with alternate interpreters (because their own code |
|
556 | 557 | would appear in the traceback).""" |
|
557 | 558 | |
|
558 | 559 | def __init__(self,color_scheme = 'Linux',tb_offset=0,long_header=0, |
|
559 | 560 | call_pdb = 0, include_vars=1): |
|
560 | 561 | """Specify traceback offset, headers and color scheme. |
|
561 | 562 | |
|
562 | 563 | Define how many frames to drop from the tracebacks. Calling it with |
|
563 | 564 | tb_offset=1 allows use of this handler in interpreters which will have |
|
564 | 565 | their own code at the top of the traceback (VerboseTB will first |
|
565 | 566 | remove that frame before printing the traceback info).""" |
|
566 | 567 | TBTools.__init__(self,color_scheme=color_scheme,call_pdb=call_pdb) |
|
567 | 568 | self.tb_offset = tb_offset |
|
568 | 569 | self.long_header = long_header |
|
569 | 570 | self.include_vars = include_vars |
|
570 | 571 | |
|
571 | 572 | def text(self, etype, evalue, etb, context=5): |
|
572 | 573 | """Return a nice text document describing the traceback.""" |
|
573 | 574 | |
|
574 | 575 | # some locals |
|
575 | 576 | try: |
|
576 | 577 | etype = etype.__name__ |
|
577 | 578 | except AttributeError: |
|
578 | 579 | pass |
|
579 | 580 | Colors = self.Colors # just a shorthand + quicker name lookup |
|
580 | 581 | ColorsNormal = Colors.Normal # used a lot |
|
581 | 582 | col_scheme = self.color_scheme_table.active_scheme_name |
|
582 | 583 | indent = ' '*INDENT_SIZE |
|
583 | 584 | em_normal = '%s\n%s%s' % (Colors.valEm, indent,ColorsNormal) |
|
584 | 585 | undefined = '%sundefined%s' % (Colors.em, ColorsNormal) |
|
585 | 586 | exc = '%s%s%s' % (Colors.excName,etype,ColorsNormal) |
|
586 | 587 | |
|
587 | 588 | # some internal-use functions |
|
588 | 589 | def text_repr(value): |
|
589 | 590 | """Hopefully pretty robust repr equivalent.""" |
|
590 | 591 | # this is pretty horrible but should always return *something* |
|
591 | 592 | try: |
|
592 | 593 | return pydoc.text.repr(value) |
|
593 | 594 | except KeyboardInterrupt: |
|
594 | 595 | raise |
|
595 | 596 | except: |
|
596 | 597 | try: |
|
597 | 598 | return repr(value) |
|
598 | 599 | except KeyboardInterrupt: |
|
599 | 600 | raise |
|
600 | 601 | except: |
|
601 | 602 | try: |
|
602 | 603 | # all still in an except block so we catch |
|
603 | 604 | # getattr raising |
|
604 | 605 | name = getattr(value, '__name__', None) |
|
605 | 606 | if name: |
|
606 | 607 | # ick, recursion |
|
607 | 608 | return text_repr(name) |
|
608 | 609 | klass = getattr(value, '__class__', None) |
|
609 | 610 | if klass: |
|
610 | 611 | return '%s instance' % text_repr(klass) |
|
611 | 612 | except KeyboardInterrupt: |
|
612 | 613 | raise |
|
613 | 614 | except: |
|
614 | 615 | return 'UNRECOVERABLE REPR FAILURE' |
|
615 | 616 | def eqrepr(value, repr=text_repr): return '=%s' % repr(value) |
|
616 | 617 | def nullrepr(value, repr=text_repr): return '' |
|
617 | 618 | |
|
618 | 619 | # meat of the code begins |
|
619 | 620 | try: |
|
620 | 621 | etype = etype.__name__ |
|
621 | 622 | except AttributeError: |
|
622 | 623 | pass |
|
623 | 624 | |
|
624 | 625 | if self.long_header: |
|
625 | 626 | # Header with the exception type, python version, and date |
|
626 | 627 | pyver = 'Python ' + string.split(sys.version)[0] + ': ' + sys.executable |
|
627 | 628 | date = time.ctime(time.time()) |
|
628 | 629 | |
|
629 | 630 | head = '%s%s%s\n%s%s%s\n%s' % (Colors.topline, '-'*75, ColorsNormal, |
|
630 | 631 | exc, ' '*(75-len(str(etype))-len(pyver)), |
|
631 | 632 | pyver, string.rjust(date, 75) ) |
|
632 | 633 | head += "\nA problem occured executing Python code. Here is the sequence of function"\ |
|
633 | 634 | "\ncalls leading up to the error, with the most recent (innermost) call last." |
|
634 | 635 | else: |
|
635 | 636 | # Simplified header |
|
636 | 637 | head = '%s%s%s\n%s%s' % (Colors.topline, '-'*75, ColorsNormal,exc, |
|
637 | 638 | string.rjust('Traceback (most recent call last)', |
|
638 | 639 | 75 - len(str(etype)) ) ) |
|
639 | 640 | frames = [] |
|
640 | 641 | # Flush cache before calling inspect. This helps alleviate some of the |
|
641 | 642 | # problems with python 2.3's inspect.py. |
|
642 | 643 | linecache.checkcache() |
|
643 | 644 | # Drop topmost frames if requested |
|
644 | 645 | try: |
|
645 | 646 | # Try the default getinnerframes and Alex's: Alex's fixes some |
|
646 | 647 | # problems, but it generates empty tracebacks for console errors |
|
647 | 648 | # (5 blanks lines) where none should be returned. |
|
648 | 649 | #records = inspect.getinnerframes(etb, context)[self.tb_offset:] |
|
649 | 650 | #print 'python records:', records # dbg |
|
650 | 651 | records = _fixed_getinnerframes(etb, context,self.tb_offset) |
|
651 | 652 | #print 'alex records:', records # dbg |
|
652 | 653 | except: |
|
653 | 654 | |
|
654 | 655 | # FIXME: I've been getting many crash reports from python 2.3 |
|
655 | 656 | # users, traceable to inspect.py. If I can find a small test-case |
|
656 | 657 | # to reproduce this, I should either write a better workaround or |
|
657 | 658 | # file a bug report against inspect (if that's the real problem). |
|
658 | 659 | # So far, I haven't been able to find an isolated example to |
|
659 | 660 | # reproduce the problem. |
|
660 | 661 | inspect_error() |
|
661 | 662 | traceback.print_exc(file=Term.cerr) |
|
662 | 663 | info('\nUnfortunately, your original traceback can not be constructed.\n') |
|
663 | 664 | return '' |
|
664 | 665 | |
|
665 | 666 | # build some color string templates outside these nested loops |
|
666 | 667 | tpl_link = '%s%%s%s' % (Colors.filenameEm,ColorsNormal) |
|
667 | 668 | tpl_call = 'in %s%%s%s%%s%s' % (Colors.vName, Colors.valEm, |
|
668 | 669 | ColorsNormal) |
|
669 | 670 | tpl_call_fail = 'in %s%%s%s(***failed resolving arguments***)%s' % \ |
|
670 | 671 | (Colors.vName, Colors.valEm, ColorsNormal) |
|
671 | 672 | tpl_local_var = '%s%%s%s' % (Colors.vName, ColorsNormal) |
|
672 | 673 | tpl_global_var = '%sglobal%s %s%%s%s' % (Colors.em, ColorsNormal, |
|
673 | 674 | Colors.vName, ColorsNormal) |
|
674 | 675 | tpl_name_val = '%%s %s= %%s%s' % (Colors.valEm, ColorsNormal) |
|
675 | 676 | tpl_line = '%s%%s%s %%s' % (Colors.lineno, ColorsNormal) |
|
676 | 677 | tpl_line_em = '%s%%s%s %%s%s' % (Colors.linenoEm,Colors.line, |
|
677 | 678 | ColorsNormal) |
|
678 | 679 | |
|
679 | 680 | # now, loop over all records printing context and info |
|
680 | 681 | abspath = os.path.abspath |
|
681 | 682 | for frame, file, lnum, func, lines, index in records: |
|
682 | 683 | #print '*** record:',file,lnum,func,lines,index # dbg |
|
683 | 684 | try: |
|
684 | 685 | file = file and abspath(file) or '?' |
|
685 | 686 | except OSError: |
|
686 | 687 | # if file is '<console>' or something not in the filesystem, |
|
687 | 688 | # the abspath call will throw an OSError. Just ignore it and |
|
688 | 689 | # keep the original file string. |
|
689 | 690 | pass |
|
690 | 691 | link = tpl_link % file |
|
691 | 692 | try: |
|
692 | 693 | args, varargs, varkw, locals = inspect.getargvalues(frame) |
|
693 | 694 | except: |
|
694 | 695 | # This can happen due to a bug in python2.3. We should be |
|
695 | 696 | # able to remove this try/except when 2.4 becomes a |
|
696 | 697 | # requirement. Bug details at http://python.org/sf/1005466 |
|
697 | 698 | inspect_error() |
|
698 | 699 | traceback.print_exc(file=Term.cerr) |
|
699 | 700 | info("\nIPython's exception reporting continues...\n") |
|
700 | 701 | |
|
701 | 702 | if func == '?': |
|
702 | 703 | call = '' |
|
703 | 704 | else: |
|
704 | 705 | # Decide whether to include variable details or not |
|
705 | 706 | var_repr = self.include_vars and eqrepr or nullrepr |
|
706 | 707 | try: |
|
707 | 708 | call = tpl_call % (func,inspect.formatargvalues(args, |
|
708 | 709 | varargs, varkw, |
|
709 | 710 | locals,formatvalue=var_repr)) |
|
710 | 711 | except KeyError: |
|
711 | 712 | # Very odd crash from inspect.formatargvalues(). The |
|
712 | 713 | # scenario under which it appeared was a call to |
|
713 | 714 | # view(array,scale) in NumTut.view.view(), where scale had |
|
714 | 715 | # been defined as a scalar (it should be a tuple). Somehow |
|
715 | 716 | # inspect messes up resolving the argument list of view() |
|
716 | 717 | # and barfs out. At some point I should dig into this one |
|
717 | 718 | # and file a bug report about it. |
|
718 | 719 | inspect_error() |
|
719 | 720 | traceback.print_exc(file=Term.cerr) |
|
720 | 721 | info("\nIPython's exception reporting continues...\n") |
|
721 | 722 | call = tpl_call_fail % func |
|
722 | 723 | |
|
723 | 724 | # Initialize a list of names on the current line, which the |
|
724 | 725 | # tokenizer below will populate. |
|
725 | 726 | names = [] |
|
726 | 727 | |
|
727 | 728 | def tokeneater(token_type, token, start, end, line): |
|
728 | 729 | """Stateful tokeneater which builds dotted names. |
|
729 | 730 | |
|
730 | 731 | The list of names it appends to (from the enclosing scope) can |
|
731 | 732 | contain repeated composite names. This is unavoidable, since |
|
732 | 733 | there is no way to disambguate partial dotted structures until |
|
733 | 734 | the full list is known. The caller is responsible for pruning |
|
734 | 735 | the final list of duplicates before using it.""" |
|
735 | 736 | |
|
736 | 737 | # build composite names |
|
737 | 738 | if token == '.': |
|
738 | 739 | try: |
|
739 | 740 | names[-1] += '.' |
|
740 | 741 | # store state so the next token is added for x.y.z names |
|
741 | 742 | tokeneater.name_cont = True |
|
742 | 743 | return |
|
743 | 744 | except IndexError: |
|
744 | 745 | pass |
|
745 | 746 | if token_type == tokenize.NAME and token not in keyword.kwlist: |
|
746 | 747 | if tokeneater.name_cont: |
|
747 | 748 | # Dotted names |
|
748 | 749 | names[-1] += token |
|
749 | 750 | tokeneater.name_cont = False |
|
750 | 751 | else: |
|
751 | 752 | # Regular new names. We append everything, the caller |
|
752 | 753 | # will be responsible for pruning the list later. It's |
|
753 | 754 | # very tricky to try to prune as we go, b/c composite |
|
754 | 755 | # names can fool us. The pruning at the end is easy |
|
755 | 756 | # to do (or the caller can print a list with repeated |
|
756 | 757 | # names if so desired. |
|
757 | 758 | names.append(token) |
|
758 | 759 | elif token_type == tokenize.NEWLINE: |
|
759 | 760 | raise IndexError |
|
760 | 761 | # we need to store a bit of state in the tokenizer to build |
|
761 | 762 | # dotted names |
|
762 | 763 | tokeneater.name_cont = False |
|
763 | 764 | |
|
764 | 765 | def linereader(file=file, lnum=[lnum], getline=linecache.getline): |
|
765 | 766 | line = getline(file, lnum[0]) |
|
766 | 767 | lnum[0] += 1 |
|
767 | 768 | return line |
|
768 | 769 | |
|
769 | 770 | # Build the list of names on this line of code where the exception |
|
770 | 771 | # occurred. |
|
771 | 772 | try: |
|
772 | 773 | # This builds the names list in-place by capturing it from the |
|
773 | 774 | # enclosing scope. |
|
774 | 775 | tokenize.tokenize(linereader, tokeneater) |
|
775 | 776 | except IndexError: |
|
776 | 777 | # signals exit of tokenizer |
|
777 | 778 | pass |
|
778 | 779 | except tokenize.TokenError,msg: |
|
779 | 780 | _m = ("An unexpected error occurred while tokenizing input\n" |
|
780 | 781 | "The following traceback may be corrupted or invalid\n" |
|
781 | 782 | "The error message is: %s\n" % msg) |
|
782 | 783 | error(_m) |
|
783 | 784 | |
|
784 | 785 | # prune names list of duplicates, but keep the right order |
|
785 | 786 | unique_names = uniq_stable(names) |
|
786 | 787 | |
|
787 | 788 | # Start loop over vars |
|
788 | 789 | lvals = [] |
|
789 | 790 | if self.include_vars: |
|
790 | 791 | for name_full in unique_names: |
|
791 | 792 | name_base = name_full.split('.',1)[0] |
|
792 | 793 | if name_base in frame.f_code.co_varnames: |
|
793 | 794 | if locals.has_key(name_base): |
|
794 | 795 | try: |
|
795 | 796 | value = repr(eval(name_full,locals)) |
|
796 | 797 | except: |
|
797 | 798 | value = undefined |
|
798 | 799 | else: |
|
799 | 800 | value = undefined |
|
800 | 801 | name = tpl_local_var % name_full |
|
801 | 802 | else: |
|
802 | 803 | if frame.f_globals.has_key(name_base): |
|
803 | 804 | try: |
|
804 | 805 | value = repr(eval(name_full,frame.f_globals)) |
|
805 | 806 | except: |
|
806 | 807 | value = undefined |
|
807 | 808 | else: |
|
808 | 809 | value = undefined |
|
809 | 810 | name = tpl_global_var % name_full |
|
810 | 811 | lvals.append(tpl_name_val % (name,value)) |
|
811 | 812 | if lvals: |
|
812 | 813 | lvals = '%s%s' % (indent,em_normal.join(lvals)) |
|
813 | 814 | else: |
|
814 | 815 | lvals = '' |
|
815 | 816 | |
|
816 | 817 | level = '%s %s\n' % (link,call) |
|
817 | 818 | |
|
818 | 819 | if index is None: |
|
819 | 820 | frames.append(level) |
|
820 | 821 | else: |
|
821 | 822 | frames.append('%s%s' % (level,''.join( |
|
822 | 823 | _format_traceback_lines(lnum,index,lines,Colors,lvals, |
|
823 | 824 | col_scheme)))) |
|
824 | 825 | |
|
825 | 826 | # Get (safely) a string form of the exception info |
|
826 | 827 | try: |
|
827 | 828 | etype_str,evalue_str = map(str,(etype,evalue)) |
|
828 | 829 | except: |
|
829 | 830 | # User exception is improperly defined. |
|
830 | 831 | etype,evalue = str,sys.exc_info()[:2] |
|
831 | 832 | etype_str,evalue_str = map(str,(etype,evalue)) |
|
832 | 833 | # ... and format it |
|
833 | 834 | exception = ['%s%s%s: %s' % (Colors.excName, etype_str, |
|
834 | 835 | ColorsNormal, evalue_str)] |
|
835 | 836 | if type(evalue) is types.InstanceType: |
|
836 | 837 | try: |
|
837 | 838 | names = [w for w in dir(evalue) if isinstance(w, basestring)] |
|
838 | 839 | except: |
|
839 | 840 | # Every now and then, an object with funny inernals blows up |
|
840 | 841 | # when dir() is called on it. We do the best we can to report |
|
841 | 842 | # the problem and continue |
|
842 | 843 | _m = '%sException reporting error (object with broken dir())%s:' |
|
843 | 844 | exception.append(_m % (Colors.excName,ColorsNormal)) |
|
844 | 845 | etype_str,evalue_str = map(str,sys.exc_info()[:2]) |
|
845 | 846 | exception.append('%s%s%s: %s' % (Colors.excName,etype_str, |
|
846 | 847 | ColorsNormal, evalue_str)) |
|
847 | 848 | names = [] |
|
848 | 849 | for name in names: |
|
849 | 850 | value = text_repr(getattr(evalue, name)) |
|
850 | 851 | exception.append('\n%s%s = %s' % (indent, name, value)) |
|
851 | 852 | |
|
852 | 853 | # vds: >> |
|
853 | 854 | if records: |
|
854 | 855 | filepath, lnum = records[-1][1:3] |
|
855 | 856 | #print "file:", str(file), "linenb", str(lnum) # dbg |
|
856 | 857 | filepath = os.path.abspath(filepath) |
|
857 | 858 | ipinst = ipapi.get() |
|
858 | 859 | if ipinst is not None: |
|
859 | 860 | ipinst.hooks.synchronize_with_editor(filepath, lnum, 0) |
|
860 | 861 | # vds: << |
|
861 | 862 | |
|
862 | 863 | # return all our info assembled as a single string |
|
863 | 864 | return '%s\n\n%s\n%s' % (head,'\n'.join(frames),''.join(exception[0]) ) |
|
864 | 865 | |
|
865 | 866 | def debugger(self,force=False): |
|
866 | 867 | """Call up the pdb debugger if desired, always clean up the tb |
|
867 | 868 | reference. |
|
868 | 869 | |
|
869 | 870 | Keywords: |
|
870 | 871 | |
|
871 | 872 | - force(False): by default, this routine checks the instance call_pdb |
|
872 | 873 | flag and does not actually invoke the debugger if the flag is false. |
|
873 | 874 | The 'force' option forces the debugger to activate even if the flag |
|
874 | 875 | is false. |
|
875 | 876 | |
|
876 | 877 | If the call_pdb flag is set, the pdb interactive debugger is |
|
877 | 878 | invoked. In all cases, the self.tb reference to the current traceback |
|
878 | 879 | is deleted to prevent lingering references which hamper memory |
|
879 | 880 | management. |
|
880 | 881 | |
|
881 | 882 | Note that each call to pdb() does an 'import readline', so if your app |
|
882 | 883 | requires a special setup for the readline completers, you'll have to |
|
883 | 884 | fix that by hand after invoking the exception handler.""" |
|
884 | 885 | |
|
885 | 886 | if force or self.call_pdb: |
|
886 | 887 | if self.pdb is None: |
|
887 | 888 | self.pdb = debugger.Pdb( |
|
888 | 889 | self.color_scheme_table.active_scheme_name) |
|
889 | 890 | # the system displayhook may have changed, restore the original |
|
890 | 891 | # for pdb |
|
891 | 892 | display_trap = DisplayTrap(None, sys.__displayhook__) |
|
892 | 893 | with display_trap: |
|
893 | 894 | self.pdb.reset() |
|
894 | 895 | # Find the right frame so we don't pop up inside ipython itself |
|
895 | 896 | if hasattr(self,'tb') and self.tb is not None: |
|
896 | 897 | etb = self.tb |
|
897 | 898 | else: |
|
898 | 899 | etb = self.tb = sys.last_traceback |
|
899 | 900 | while self.tb is not None and self.tb.tb_next is not None: |
|
900 | 901 | self.tb = self.tb.tb_next |
|
901 | 902 | if etb and etb.tb_next: |
|
902 | 903 | etb = etb.tb_next |
|
903 | 904 | self.pdb.botframe = etb.tb_frame |
|
904 | 905 | self.pdb.interaction(self.tb.tb_frame, self.tb) |
|
905 | 906 | |
|
906 | 907 | if hasattr(self,'tb'): |
|
907 | 908 | del self.tb |
|
908 | 909 | |
|
909 | 910 | def handler(self, info=None): |
|
910 | 911 | (etype, evalue, etb) = info or sys.exc_info() |
|
911 | 912 | self.tb = etb |
|
912 | 913 | Term.cout.flush() |
|
913 |
Term.cerr.write |
|
|
914 | Term.cerr.write(self.text(etype, evalue, etb)) | |
|
915 | Term.cerr.write('\n') | |
|
914 | 916 | |
|
915 | 917 | # Changed so an instance can just be called as VerboseTB_inst() and print |
|
916 | 918 | # out the right info on its own. |
|
917 | 919 | def __call__(self, etype=None, evalue=None, etb=None): |
|
918 | 920 | """This hook can replace sys.excepthook (for Python 2.1 or higher).""" |
|
919 | 921 | if etb is None: |
|
920 | 922 | self.handler() |
|
921 | 923 | else: |
|
922 | 924 | self.handler((etype, evalue, etb)) |
|
923 | 925 | try: |
|
924 | 926 | self.debugger() |
|
925 | 927 | except KeyboardInterrupt: |
|
926 | 928 | print "\nKeyboardInterrupt" |
|
927 | 929 | |
|
928 | 930 | #---------------------------------------------------------------------------- |
|
929 | 931 | class FormattedTB(VerboseTB,ListTB): |
|
930 | 932 | """Subclass ListTB but allow calling with a traceback. |
|
931 | 933 | |
|
932 | 934 | It can thus be used as a sys.excepthook for Python > 2.1. |
|
933 | 935 | |
|
934 | 936 | Also adds 'Context' and 'Verbose' modes, not available in ListTB. |
|
935 | 937 | |
|
936 | 938 | Allows a tb_offset to be specified. This is useful for situations where |
|
937 | 939 | one needs to remove a number of topmost frames from the traceback (such as |
|
938 | 940 | occurs with python programs that themselves execute other python code, |
|
939 | 941 | like Python shells). """ |
|
940 | 942 | |
|
941 | 943 | def __init__(self, mode = 'Plain', color_scheme='Linux', |
|
942 | 944 | tb_offset = 0,long_header=0,call_pdb=0,include_vars=0): |
|
943 | 945 | |
|
944 | 946 | # NEVER change the order of this list. Put new modes at the end: |
|
945 | 947 | self.valid_modes = ['Plain','Context','Verbose'] |
|
946 | 948 | self.verbose_modes = self.valid_modes[1:3] |
|
947 | 949 | |
|
948 | 950 | VerboseTB.__init__(self,color_scheme,tb_offset,long_header, |
|
949 | 951 | call_pdb=call_pdb,include_vars=include_vars) |
|
950 | 952 | self.set_mode(mode) |
|
951 | 953 | |
|
952 | 954 | def _extract_tb(self,tb): |
|
953 | 955 | if tb: |
|
954 | 956 | return traceback.extract_tb(tb) |
|
955 | 957 | else: |
|
956 | 958 | return None |
|
957 | 959 | |
|
958 | 960 | def text(self, etype, value, tb,context=5,mode=None): |
|
959 | 961 | """Return formatted traceback. |
|
960 | 962 | |
|
961 | 963 | If the optional mode parameter is given, it overrides the current |
|
962 | 964 | mode.""" |
|
963 | 965 | |
|
964 | 966 | if mode is None: |
|
965 | 967 | mode = self.mode |
|
966 | 968 | if mode in self.verbose_modes: |
|
967 | 969 | # verbose modes need a full traceback |
|
968 | 970 | return VerboseTB.text(self,etype, value, tb,context=5) |
|
969 | 971 | else: |
|
970 | 972 | # We must check the source cache because otherwise we can print |
|
971 | 973 | # out-of-date source code. |
|
972 | 974 | linecache.checkcache() |
|
973 | 975 | # Now we can extract and format the exception |
|
974 | 976 | elist = self._extract_tb(tb) |
|
975 | 977 | if len(elist) > self.tb_offset: |
|
976 | 978 | del elist[:self.tb_offset] |
|
977 | 979 | return ListTB.text(self,etype,value,elist) |
|
978 | 980 | |
|
979 | 981 | def set_mode(self,mode=None): |
|
980 | 982 | """Switch to the desired mode. |
|
981 | 983 | |
|
982 | 984 | If mode is not specified, cycles through the available modes.""" |
|
983 | 985 | |
|
984 | 986 | if not mode: |
|
985 | 987 | new_idx = ( self.valid_modes.index(self.mode) + 1 ) % \ |
|
986 | 988 | len(self.valid_modes) |
|
987 | 989 | self.mode = self.valid_modes[new_idx] |
|
988 | 990 | elif mode not in self.valid_modes: |
|
989 | 991 | raise ValueError, 'Unrecognized mode in FormattedTB: <'+mode+'>\n'\ |
|
990 | 992 | 'Valid modes: '+str(self.valid_modes) |
|
991 | 993 | else: |
|
992 | 994 | self.mode = mode |
|
993 | 995 | # include variable details only in 'Verbose' mode |
|
994 | 996 | self.include_vars = (self.mode == self.valid_modes[2]) |
|
995 | 997 | |
|
996 | 998 | # some convenient shorcuts |
|
997 | 999 | def plain(self): |
|
998 | 1000 | self.set_mode(self.valid_modes[0]) |
|
999 | 1001 | |
|
1000 | 1002 | def context(self): |
|
1001 | 1003 | self.set_mode(self.valid_modes[1]) |
|
1002 | 1004 | |
|
1003 | 1005 | def verbose(self): |
|
1004 | 1006 | self.set_mode(self.valid_modes[2]) |
|
1005 | 1007 | |
|
1006 | 1008 | #---------------------------------------------------------------------------- |
|
1007 | 1009 | class AutoFormattedTB(FormattedTB): |
|
1008 | 1010 | """A traceback printer which can be called on the fly. |
|
1009 | 1011 | |
|
1010 | 1012 | It will find out about exceptions by itself. |
|
1011 | 1013 | |
|
1012 | 1014 | A brief example: |
|
1013 | 1015 | |
|
1014 | 1016 | AutoTB = AutoFormattedTB(mode = 'Verbose',color_scheme='Linux') |
|
1015 | 1017 | try: |
|
1016 | 1018 | ... |
|
1017 | 1019 | except: |
|
1018 | 1020 | AutoTB() # or AutoTB(out=logfile) where logfile is an open file object |
|
1019 | 1021 | """ |
|
1020 | 1022 | |
|
1021 | 1023 | def __call__(self,etype=None,evalue=None,etb=None, |
|
1022 | 1024 | out=None,tb_offset=None): |
|
1023 | 1025 | """Print out a formatted exception traceback. |
|
1024 | 1026 | |
|
1025 | 1027 | Optional arguments: |
|
1026 | 1028 | - out: an open file-like object to direct output to. |
|
1027 | 1029 | |
|
1028 | 1030 | - tb_offset: the number of frames to skip over in the stack, on a |
|
1029 | 1031 | per-call basis (this overrides temporarily the instance's tb_offset |
|
1030 | 1032 | given at initialization time. """ |
|
1031 | 1033 | |
|
1032 | 1034 | if out is None: |
|
1033 | 1035 | out = sys.stdout if self.out_stream=='stdout' else self.out_stream |
|
1034 | 1036 | Term.cout.flush() |
|
1035 | 1037 | if tb_offset is not None: |
|
1036 | 1038 | tb_offset, self.tb_offset = self.tb_offset, tb_offset |
|
1037 | 1039 | out.write(self.text(etype, evalue, etb)) |
|
1038 | 1040 | out.write('\n') |
|
1039 | 1041 | self.tb_offset = tb_offset |
|
1040 | 1042 | else: |
|
1041 | 1043 | out.write(self.text(etype, evalue, etb)) |
|
1042 | 1044 | out.write('\n') |
|
1043 | 1045 | out.flush() |
|
1044 | 1046 | try: |
|
1045 | 1047 | self.debugger() |
|
1046 | 1048 | except KeyboardInterrupt: |
|
1047 | 1049 | print "\nKeyboardInterrupt" |
|
1048 | 1050 | |
|
1049 | 1051 | def text(self,etype=None,value=None,tb=None,context=5,mode=None): |
|
1050 | 1052 | if etype is None: |
|
1051 | 1053 | etype,value,tb = sys.exc_info() |
|
1052 | 1054 | self.tb = tb |
|
1053 | 1055 | return FormattedTB.text(self,etype,value,tb,context=5,mode=mode) |
|
1054 | 1056 | |
|
1055 | 1057 | #--------------------------------------------------------------------------- |
|
1056 | 1058 | # A simple class to preserve Nathan's original functionality. |
|
1057 | 1059 | class ColorTB(FormattedTB): |
|
1058 | 1060 | """Shorthand to initialize a FormattedTB in Linux colors mode.""" |
|
1059 | 1061 | def __init__(self,color_scheme='Linux',call_pdb=0): |
|
1060 | 1062 | FormattedTB.__init__(self,color_scheme=color_scheme, |
|
1061 | 1063 | call_pdb=call_pdb) |
|
1062 | 1064 | |
|
1063 | 1065 | #---------------------------------------------------------------------------- |
|
1064 | 1066 | # module testing (minimal) |
|
1065 | 1067 | if __name__ == "__main__": |
|
1066 | 1068 | def spam(c, (d, e)): |
|
1067 | 1069 | x = c + d |
|
1068 | 1070 | y = c * d |
|
1069 | 1071 | foo(x, y) |
|
1070 | 1072 | |
|
1071 | 1073 | def foo(a, b, bar=1): |
|
1072 | 1074 | eggs(a, b + bar) |
|
1073 | 1075 | |
|
1074 | 1076 | def eggs(f, g, z=globals()): |
|
1075 | 1077 | h = f + g |
|
1076 | 1078 | i = f - g |
|
1077 | 1079 | return h / i |
|
1078 | 1080 | |
|
1079 | 1081 | print '' |
|
1080 | 1082 | print '*** Before ***' |
|
1081 | 1083 | try: |
|
1082 | 1084 | print spam(1, (2, 3)) |
|
1083 | 1085 | except: |
|
1084 | 1086 | traceback.print_exc() |
|
1085 | 1087 | print '' |
|
1086 | 1088 | |
|
1087 | 1089 | handler = ColorTB() |
|
1088 | 1090 | print '*** ColorTB ***' |
|
1089 | 1091 | try: |
|
1090 | 1092 | print spam(1, (2, 3)) |
|
1091 | 1093 | except: |
|
1092 | 1094 | apply(handler, sys.exc_info() ) |
|
1093 | 1095 | print '' |
|
1094 | 1096 | |
|
1095 | 1097 | handler = VerboseTB() |
|
1096 | 1098 | print '*** VerboseTB ***' |
|
1097 | 1099 | try: |
|
1098 | 1100 | print spam(1, (2, 3)) |
|
1099 | 1101 | except: |
|
1100 | 1102 | apply(handler, sys.exc_info() ) |
|
1101 | 1103 | print '' |
|
1102 | 1104 |
@@ -1,292 +1,292 | |||
|
1 | 1 | # encoding: utf-8 |
|
2 | 2 | """ |
|
3 | 3 | IO related utilities. |
|
4 | 4 | """ |
|
5 | 5 | |
|
6 | 6 | #----------------------------------------------------------------------------- |
|
7 | 7 | # Copyright (C) 2008-2009 The IPython Development Team |
|
8 | 8 | # |
|
9 | 9 | # Distributed under the terms of the BSD License. The full license is in |
|
10 | 10 | # the file COPYING, distributed as part of this software. |
|
11 | 11 | #----------------------------------------------------------------------------- |
|
12 | 12 | |
|
13 | 13 | #----------------------------------------------------------------------------- |
|
14 | 14 | # Imports |
|
15 | 15 | #----------------------------------------------------------------------------- |
|
16 | 16 | |
|
17 | 17 | import sys |
|
18 | 18 | import tempfile |
|
19 | 19 | |
|
20 | 20 | from IPython.external.Itpl import itpl, printpl |
|
21 | 21 | |
|
22 | 22 | #----------------------------------------------------------------------------- |
|
23 | 23 | # Code |
|
24 | 24 | #----------------------------------------------------------------------------- |
|
25 | 25 | |
|
26 | 26 | |
|
27 | 27 | class IOStream: |
|
28 | 28 | |
|
29 | 29 | def __init__(self,stream,fallback): |
|
30 | 30 | if not hasattr(stream,'write') or not hasattr(stream,'flush'): |
|
31 | 31 | stream = fallback |
|
32 | 32 | self.stream = stream |
|
33 | 33 | self._swrite = stream.write |
|
34 | 34 | self.flush = stream.flush |
|
35 | 35 | |
|
36 | 36 | def write(self,data): |
|
37 | 37 | try: |
|
38 | 38 | self._swrite(data) |
|
39 | 39 | except: |
|
40 | 40 | try: |
|
41 | 41 | # print handles some unicode issues which may trip a plain |
|
42 | 42 | # write() call. Attempt to emulate write() by using a |
|
43 | 43 | # trailing comma |
|
44 | 44 | print >> self.stream, data, |
|
45 | 45 | except: |
|
46 | 46 | # if we get here, something is seriously broken. |
|
47 | 47 | print >> sys.stderr, \ |
|
48 | 48 | 'ERROR - failed to write data to stream:', self.stream |
|
49 | 49 | |
|
50 | def writeln(self, data): | |
|
51 | self.write(data) | |
|
52 | self.write('\n') | |
|
50 | # This class used to have a writeln method, but regular files and streams | |
|
51 | # in Python don't have this method. We need to keep this completely | |
|
52 | # compatible so we removed it. | |
|
53 | 53 | |
|
54 | 54 | def close(self): |
|
55 | 55 | pass |
|
56 | 56 | |
|
57 | 57 | |
|
58 | 58 | class IOTerm: |
|
59 | 59 | """ Term holds the file or file-like objects for handling I/O operations. |
|
60 | 60 | |
|
61 | 61 | These are normally just sys.stdin, sys.stdout and sys.stderr but for |
|
62 | 62 | Windows they can can replaced to allow editing the strings before they are |
|
63 | 63 | displayed.""" |
|
64 | 64 | |
|
65 | 65 | # In the future, having IPython channel all its I/O operations through |
|
66 | 66 | # this class will make it easier to embed it into other environments which |
|
67 | 67 | # are not a normal terminal (such as a GUI-based shell) |
|
68 | 68 | def __init__(self,cin=None,cout=None,cerr=None): |
|
69 | 69 | self.cin = IOStream(cin,sys.stdin) |
|
70 | 70 | self.cout = IOStream(cout,sys.stdout) |
|
71 | 71 | self.cerr = IOStream(cerr,sys.stderr) |
|
72 | 72 | |
|
73 | 73 | |
|
74 | 74 | # Global variable to be used for all I/O |
|
75 | 75 | Term = IOTerm() |
|
76 | 76 | |
|
77 | 77 | |
|
78 | 78 | import IPython.utils.rlineimpl as readline |
|
79 | 79 | # Remake Term to use the readline i/o facilities |
|
80 | 80 | if sys.platform == 'win32' and readline.have_readline: |
|
81 | 81 | |
|
82 | 82 | Term = IOTerm(cout=readline._outputfile,cerr=readline._outputfile) |
|
83 | 83 | |
|
84 | 84 | |
|
85 | 85 | class Tee(object): |
|
86 | 86 | """A class to duplicate an output stream to stdout/err. |
|
87 | 87 | |
|
88 | 88 | This works in a manner very similar to the Unix 'tee' command. |
|
89 | 89 | |
|
90 | 90 | When the object is closed or deleted, it closes the original file given to |
|
91 | 91 | it for duplication. |
|
92 | 92 | """ |
|
93 | 93 | # Inspired by: |
|
94 | 94 | # http://mail.python.org/pipermail/python-list/2007-May/442737.html |
|
95 | 95 | |
|
96 | 96 | def __init__(self, file_or_name, mode=None, channel='stdout'): |
|
97 | 97 | """Construct a new Tee object. |
|
98 | 98 | |
|
99 | 99 | Parameters |
|
100 | 100 | ---------- |
|
101 | 101 | file_or_name : filename or open filehandle (writable) |
|
102 | 102 | File that will be duplicated |
|
103 | 103 | |
|
104 | 104 | mode : optional, valid mode for open(). |
|
105 | 105 | If a filename was give, open with this mode. |
|
106 | 106 | |
|
107 | 107 | channel : str, one of ['stdout', 'stderr'] |
|
108 | 108 | """ |
|
109 | 109 | if channel not in ['stdout', 'stderr']: |
|
110 | 110 | raise ValueError('Invalid channel spec %s' % channel) |
|
111 | 111 | |
|
112 | 112 | if hasattr(file, 'write') and hasattr(file, 'seek'): |
|
113 | 113 | self.file = file_or_name |
|
114 | 114 | else: |
|
115 | 115 | self.file = open(file_or_name, mode) |
|
116 | 116 | self.channel = channel |
|
117 | 117 | self.ostream = getattr(sys, channel) |
|
118 | 118 | setattr(sys, channel, self) |
|
119 | 119 | self._closed = False |
|
120 | 120 | |
|
121 | 121 | def close(self): |
|
122 | 122 | """Close the file and restore the channel.""" |
|
123 | 123 | self.flush() |
|
124 | 124 | setattr(sys, self.channel, self.ostream) |
|
125 | 125 | self.file.close() |
|
126 | 126 | self._closed = True |
|
127 | 127 | |
|
128 | 128 | def write(self, data): |
|
129 | 129 | """Write data to both channels.""" |
|
130 | 130 | self.file.write(data) |
|
131 | 131 | self.ostream.write(data) |
|
132 | 132 | self.ostream.flush() |
|
133 | 133 | |
|
134 | 134 | def flush(self): |
|
135 | 135 | """Flush both channels.""" |
|
136 | 136 | self.file.flush() |
|
137 | 137 | self.ostream.flush() |
|
138 | 138 | |
|
139 | 139 | def __del__(self): |
|
140 | 140 | if not self._closed: |
|
141 | 141 | self.close() |
|
142 | 142 | |
|
143 | 143 | |
|
144 | 144 | def file_read(filename): |
|
145 | 145 | """Read a file and close it. Returns the file source.""" |
|
146 | 146 | fobj = open(filename,'r'); |
|
147 | 147 | source = fobj.read(); |
|
148 | 148 | fobj.close() |
|
149 | 149 | return source |
|
150 | 150 | |
|
151 | 151 | |
|
152 | 152 | def file_readlines(filename): |
|
153 | 153 | """Read a file and close it. Returns the file source using readlines().""" |
|
154 | 154 | fobj = open(filename,'r'); |
|
155 | 155 | lines = fobj.readlines(); |
|
156 | 156 | fobj.close() |
|
157 | 157 | return lines |
|
158 | 158 | |
|
159 | 159 | |
|
160 | 160 | def raw_input_multi(header='', ps1='==> ', ps2='..> ',terminate_str = '.'): |
|
161 | 161 | """Take multiple lines of input. |
|
162 | 162 | |
|
163 | 163 | A list with each line of input as a separate element is returned when a |
|
164 | 164 | termination string is entered (defaults to a single '.'). Input can also |
|
165 | 165 | terminate via EOF (^D in Unix, ^Z-RET in Windows). |
|
166 | 166 | |
|
167 | 167 | Lines of input which end in \\ are joined into single entries (and a |
|
168 | 168 | secondary continuation prompt is issued as long as the user terminates |
|
169 | 169 | lines with \\). This allows entering very long strings which are still |
|
170 | 170 | meant to be treated as single entities. |
|
171 | 171 | """ |
|
172 | 172 | |
|
173 | 173 | try: |
|
174 | 174 | if header: |
|
175 | 175 | header += '\n' |
|
176 | 176 | lines = [raw_input(header + ps1)] |
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177 | 177 | except EOFError: |
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178 | 178 | return [] |
|
179 | 179 | terminate = [terminate_str] |
|
180 | 180 | try: |
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181 | 181 | while lines[-1:] != terminate: |
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182 | 182 | new_line = raw_input(ps1) |
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183 | 183 | while new_line.endswith('\\'): |
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184 | 184 | new_line = new_line[:-1] + raw_input(ps2) |
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185 | 185 | lines.append(new_line) |
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186 | 186 | |
|
187 | 187 | return lines[:-1] # don't return the termination command |
|
188 | 188 | except EOFError: |
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189 | 189 | |
|
190 | 190 | return lines |
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191 | 191 | |
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192 | 192 | |
|
193 | 193 | def raw_input_ext(prompt='', ps2='... '): |
|
194 | 194 | """Similar to raw_input(), but accepts extended lines if input ends with \\.""" |
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195 | 195 | |
|
196 | 196 | line = raw_input(prompt) |
|
197 | 197 | while line.endswith('\\'): |
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198 | 198 | line = line[:-1] + raw_input(ps2) |
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199 | 199 | return line |
|
200 | 200 | |
|
201 | 201 | |
|
202 | 202 | def ask_yes_no(prompt,default=None): |
|
203 | 203 | """Asks a question and returns a boolean (y/n) answer. |
|
204 | 204 | |
|
205 | 205 | If default is given (one of 'y','n'), it is used if the user input is |
|
206 | 206 | empty. Otherwise the question is repeated until an answer is given. |
|
207 | 207 | |
|
208 | 208 | An EOF is treated as the default answer. If there is no default, an |
|
209 | 209 | exception is raised to prevent infinite loops. |
|
210 | 210 | |
|
211 | 211 | Valid answers are: y/yes/n/no (match is not case sensitive).""" |
|
212 | 212 | |
|
213 | 213 | answers = {'y':True,'n':False,'yes':True,'no':False} |
|
214 | 214 | ans = None |
|
215 | 215 | while ans not in answers.keys(): |
|
216 | 216 | try: |
|
217 | 217 | ans = raw_input(prompt+' ').lower() |
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218 | 218 | if not ans: # response was an empty string |
|
219 | 219 | ans = default |
|
220 | 220 | except KeyboardInterrupt: |
|
221 | 221 | pass |
|
222 | 222 | except EOFError: |
|
223 | 223 | if default in answers.keys(): |
|
224 | 224 | ans = default |
|
225 | 225 | |
|
226 | 226 | else: |
|
227 | 227 | raise |
|
228 | 228 | |
|
229 | 229 | return answers[ans] |
|
230 | 230 | |
|
231 | 231 | |
|
232 | 232 | class NLprinter: |
|
233 | 233 | """Print an arbitrarily nested list, indicating index numbers. |
|
234 | 234 | |
|
235 | 235 | An instance of this class called nlprint is available and callable as a |
|
236 | 236 | function. |
|
237 | 237 | |
|
238 | 238 | nlprint(list,indent=' ',sep=': ') -> prints indenting each level by 'indent' |
|
239 | 239 | and using 'sep' to separate the index from the value. """ |
|
240 | 240 | |
|
241 | 241 | def __init__(self): |
|
242 | 242 | self.depth = 0 |
|
243 | 243 | |
|
244 | 244 | def __call__(self,lst,pos='',**kw): |
|
245 | 245 | """Prints the nested list numbering levels.""" |
|
246 | 246 | kw.setdefault('indent',' ') |
|
247 | 247 | kw.setdefault('sep',': ') |
|
248 | 248 | kw.setdefault('start',0) |
|
249 | 249 | kw.setdefault('stop',len(lst)) |
|
250 | 250 | # we need to remove start and stop from kw so they don't propagate |
|
251 | 251 | # into a recursive call for a nested list. |
|
252 | 252 | start = kw['start']; del kw['start'] |
|
253 | 253 | stop = kw['stop']; del kw['stop'] |
|
254 | 254 | if self.depth == 0 and 'header' in kw.keys(): |
|
255 | 255 | print kw['header'] |
|
256 | 256 | |
|
257 | 257 | for idx in range(start,stop): |
|
258 | 258 | elem = lst[idx] |
|
259 | 259 | if type(elem)==type([]): |
|
260 | 260 | self.depth += 1 |
|
261 | 261 | self.__call__(elem,itpl('$pos$idx,'),**kw) |
|
262 | 262 | self.depth -= 1 |
|
263 | 263 | else: |
|
264 | 264 | printpl(kw['indent']*self.depth+'$pos$idx$kw["sep"]$elem') |
|
265 | 265 | |
|
266 | 266 | nlprint = NLprinter() |
|
267 | 267 | |
|
268 | 268 | |
|
269 | 269 | def temp_pyfile(src, ext='.py'): |
|
270 | 270 | """Make a temporary python file, return filename and filehandle. |
|
271 | 271 | |
|
272 | 272 | Parameters |
|
273 | 273 | ---------- |
|
274 | 274 | src : string or list of strings (no need for ending newlines if list) |
|
275 | 275 | Source code to be written to the file. |
|
276 | 276 | |
|
277 | 277 | ext : optional, string |
|
278 | 278 | Extension for the generated file. |
|
279 | 279 | |
|
280 | 280 | Returns |
|
281 | 281 | ------- |
|
282 | 282 | (filename, open filehandle) |
|
283 | 283 | It is the caller's responsibility to close the open file and unlink it. |
|
284 | 284 | """ |
|
285 | 285 | fname = tempfile.mkstemp(ext)[1] |
|
286 | 286 | f = open(fname,'w') |
|
287 | 287 | f.write(src) |
|
288 | 288 | f.flush() |
|
289 | 289 | return fname, f |
|
290 | 290 | |
|
291 | 291 | |
|
292 | 292 |
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