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1 | # -*- coding: utf-8 -*- |
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1 | # -*- coding: utf-8 -*- | |
2 | """ |
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2 | """ | |
3 | Verbose and colourful traceback formatting. |
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3 | Verbose and colourful traceback formatting. | |
4 |
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4 | |||
5 | **ColorTB** |
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5 | **ColorTB** | |
6 |
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6 | |||
7 | I've always found it a bit hard to visually parse tracebacks in Python. The |
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7 | I've always found it a bit hard to visually parse tracebacks in Python. The | |
8 | ColorTB class is a solution to that problem. It colors the different parts of a |
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8 | ColorTB class is a solution to that problem. It colors the different parts of a | |
9 | traceback in a manner similar to what you would expect from a syntax-highlighting |
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9 | traceback in a manner similar to what you would expect from a syntax-highlighting | |
10 | text editor. |
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10 | text editor. | |
11 |
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11 | |||
12 | Installation instructions for ColorTB:: |
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12 | Installation instructions for ColorTB:: | |
13 |
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13 | |||
14 | import sys,ultratb |
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14 | import sys,ultratb | |
15 | sys.excepthook = ultratb.ColorTB() |
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15 | sys.excepthook = ultratb.ColorTB() | |
16 |
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16 | |||
17 | **VerboseTB** |
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17 | **VerboseTB** | |
18 |
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18 | |||
19 | I've also included a port of Ka-Ping Yee's "cgitb.py" that produces all kinds |
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19 | I've also included a port of Ka-Ping Yee's "cgitb.py" that produces all kinds | |
20 | of useful info when a traceback occurs. Ping originally had it spit out HTML |
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20 | of useful info when a traceback occurs. Ping originally had it spit out HTML | |
21 | and intended it for CGI programmers, but why should they have all the fun? I |
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21 | and intended it for CGI programmers, but why should they have all the fun? I | |
22 | altered it to spit out colored text to the terminal. It's a bit overwhelming, |
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22 | altered it to spit out colored text to the terminal. It's a bit overwhelming, | |
23 | but kind of neat, and maybe useful for long-running programs that you believe |
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23 | but kind of neat, and maybe useful for long-running programs that you believe | |
24 | are bug-free. If a crash *does* occur in that type of program you want details. |
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24 | are bug-free. If a crash *does* occur in that type of program you want details. | |
25 | Give it a shot--you'll love it or you'll hate it. |
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25 | Give it a shot--you'll love it or you'll hate it. | |
26 |
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26 | |||
27 | .. note:: |
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27 | .. note:: | |
28 |
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28 | |||
29 | The Verbose mode prints the variables currently visible where the exception |
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29 | The Verbose mode prints the variables currently visible where the exception | |
30 | happened (shortening their strings if too long). This can potentially be |
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30 | happened (shortening their strings if too long). This can potentially be | |
31 | very slow, if you happen to have a huge data structure whose string |
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31 | very slow, if you happen to have a huge data structure whose string | |
32 | representation is complex to compute. Your computer may appear to freeze for |
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32 | representation is complex to compute. Your computer may appear to freeze for | |
33 | a while with cpu usage at 100%. If this occurs, you can cancel the traceback |
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33 | a while with cpu usage at 100%. If this occurs, you can cancel the traceback | |
34 | with Ctrl-C (maybe hitting it more than once). |
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34 | with Ctrl-C (maybe hitting it more than once). | |
35 |
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35 | |||
36 | If you encounter this kind of situation often, you may want to use the |
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36 | If you encounter this kind of situation often, you may want to use the | |
37 | Verbose_novars mode instead of the regular Verbose, which avoids formatting |
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37 | Verbose_novars mode instead of the regular Verbose, which avoids formatting | |
38 | variables (but otherwise includes the information and context given by |
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38 | variables (but otherwise includes the information and context given by | |
39 | Verbose). |
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39 | Verbose). | |
40 |
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40 | |||
41 | .. note:: |
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41 | .. note:: | |
42 |
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42 | |||
43 | The verbose mode print all variables in the stack, which means it can |
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43 | The verbose mode print all variables in the stack, which means it can | |
44 | potentially leak sensitive information like access keys, or unencrypted |
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44 | potentially leak sensitive information like access keys, or unencrypted | |
45 | password. |
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45 | password. | |
46 |
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46 | |||
47 | Installation instructions for VerboseTB:: |
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47 | Installation instructions for VerboseTB:: | |
48 |
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48 | |||
49 | import sys,ultratb |
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49 | import sys,ultratb | |
50 | sys.excepthook = ultratb.VerboseTB() |
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50 | sys.excepthook = ultratb.VerboseTB() | |
51 |
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51 | |||
52 | Note: Much of the code in this module was lifted verbatim from the standard |
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52 | Note: Much of the code in this module was lifted verbatim from the standard | |
53 | library module 'traceback.py' and Ka-Ping Yee's 'cgitb.py'. |
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53 | library module 'traceback.py' and Ka-Ping Yee's 'cgitb.py'. | |
54 |
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54 | |||
55 | Color schemes |
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55 | Color schemes | |
56 | ------------- |
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56 | ------------- | |
57 |
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57 | |||
58 | The colors are defined in the class TBTools through the use of the |
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58 | The colors are defined in the class TBTools through the use of the | |
59 | ColorSchemeTable class. Currently the following exist: |
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59 | ColorSchemeTable class. Currently the following exist: | |
60 |
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60 | |||
61 | - NoColor: allows all of this module to be used in any terminal (the color |
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61 | - NoColor: allows all of this module to be used in any terminal (the color | |
62 | escapes are just dummy blank strings). |
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62 | escapes are just dummy blank strings). | |
63 |
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63 | |||
64 | - Linux: is meant to look good in a terminal like the Linux console (black |
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64 | - Linux: is meant to look good in a terminal like the Linux console (black | |
65 | or very dark background). |
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65 | or very dark background). | |
66 |
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66 | |||
67 | - LightBG: similar to Linux but swaps dark/light colors to be more readable |
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67 | - LightBG: similar to Linux but swaps dark/light colors to be more readable | |
68 | in light background terminals. |
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68 | in light background terminals. | |
69 |
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69 | |||
70 | - Neutral: a neutral color scheme that should be readable on both light and |
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70 | - Neutral: a neutral color scheme that should be readable on both light and | |
71 | dark background |
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71 | dark background | |
72 |
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72 | |||
73 | You can implement other color schemes easily, the syntax is fairly |
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73 | You can implement other color schemes easily, the syntax is fairly | |
74 | self-explanatory. Please send back new schemes you develop to the author for |
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74 | self-explanatory. Please send back new schemes you develop to the author for | |
75 | possible inclusion in future releases. |
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75 | possible inclusion in future releases. | |
76 |
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76 | |||
77 | Inheritance diagram: |
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77 | Inheritance diagram: | |
78 |
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78 | |||
79 | .. inheritance-diagram:: IPython.core.ultratb |
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79 | .. inheritance-diagram:: IPython.core.ultratb | |
80 | :parts: 3 |
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80 | :parts: 3 | |
81 | """ |
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81 | """ | |
82 |
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82 | |||
83 | #***************************************************************************** |
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83 | #***************************************************************************** | |
84 | # Copyright (C) 2001 Nathaniel Gray <n8gray@caltech.edu> |
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84 | # Copyright (C) 2001 Nathaniel Gray <n8gray@caltech.edu> | |
85 | # Copyright (C) 2001-2004 Fernando Perez <fperez@colorado.edu> |
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85 | # Copyright (C) 2001-2004 Fernando Perez <fperez@colorado.edu> | |
86 | # |
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86 | # | |
87 | # Distributed under the terms of the BSD License. The full license is in |
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87 | # Distributed under the terms of the BSD License. The full license is in | |
88 | # the file COPYING, distributed as part of this software. |
|
88 | # the file COPYING, distributed as part of this software. | |
89 | #***************************************************************************** |
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89 | #***************************************************************************** | |
90 |
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90 | |||
91 |
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91 | |||
92 | import inspect |
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92 | import inspect | |
93 | import linecache |
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93 | import linecache | |
94 | import pydoc |
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94 | import pydoc | |
95 | import sys |
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95 | import sys | |
96 | import time |
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96 | import time | |
97 | import traceback |
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97 | import traceback | |
98 |
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98 | |||
99 | import stack_data |
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99 | import stack_data | |
100 | from pygments.formatters.terminal256 import Terminal256Formatter |
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100 | from pygments.formatters.terminal256 import Terminal256Formatter | |
101 | from pygments.styles import get_style_by_name |
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101 | from pygments.styles import get_style_by_name | |
102 |
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102 | |||
103 | # IPython's own modules |
|
103 | # IPython's own modules | |
104 | from IPython import get_ipython |
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104 | from IPython import get_ipython | |
105 | from IPython.core import debugger |
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105 | from IPython.core import debugger | |
106 | from IPython.core.display_trap import DisplayTrap |
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106 | from IPython.core.display_trap import DisplayTrap | |
107 | from IPython.core.excolors import exception_colors |
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107 | from IPython.core.excolors import exception_colors | |
108 | from IPython.utils import path as util_path |
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108 | from IPython.utils import path as util_path | |
109 | from IPython.utils import py3compat |
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109 | from IPython.utils import py3compat | |
110 | from IPython.utils.terminal import get_terminal_size |
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110 | from IPython.utils.terminal import get_terminal_size | |
111 |
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111 | |||
112 | import IPython.utils.colorable as colorable |
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112 | import IPython.utils.colorable as colorable | |
113 |
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113 | |||
114 | # Globals |
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114 | # Globals | |
115 | # amount of space to put line numbers before verbose tracebacks |
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115 | # amount of space to put line numbers before verbose tracebacks | |
116 | INDENT_SIZE = 8 |
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116 | INDENT_SIZE = 8 | |
117 |
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117 | |||
118 | # Default color scheme. This is used, for example, by the traceback |
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118 | # Default color scheme. This is used, for example, by the traceback | |
119 | # formatter. When running in an actual IPython instance, the user's rc.colors |
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119 | # formatter. When running in an actual IPython instance, the user's rc.colors | |
120 | # value is used, but having a module global makes this functionality available |
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120 | # value is used, but having a module global makes this functionality available | |
121 | # to users of ultratb who are NOT running inside ipython. |
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121 | # to users of ultratb who are NOT running inside ipython. | |
122 | DEFAULT_SCHEME = 'NoColor' |
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122 | DEFAULT_SCHEME = 'NoColor' | |
123 |
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123 | |||
124 | # --------------------------------------------------------------------------- |
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124 | # --------------------------------------------------------------------------- | |
125 | # Code begins |
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125 | # Code begins | |
126 |
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126 | |||
127 | # Helper function -- largely belongs to VerboseTB, but we need the same |
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127 | # Helper function -- largely belongs to VerboseTB, but we need the same | |
128 | # functionality to produce a pseudo verbose TB for SyntaxErrors, so that they |
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128 | # functionality to produce a pseudo verbose TB for SyntaxErrors, so that they | |
129 | # can be recognized properly by ipython.el's py-traceback-line-re |
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129 | # can be recognized properly by ipython.el's py-traceback-line-re | |
130 | # (SyntaxErrors have to be treated specially because they have no traceback) |
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130 | # (SyntaxErrors have to be treated specially because they have no traceback) | |
131 |
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131 | |||
132 |
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132 | |||
133 | def _format_traceback_lines(lines, Colors, has_colors, lvals): |
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133 | def _format_traceback_lines(lines, Colors, has_colors, lvals): | |
134 | """ |
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134 | """ | |
135 | Format tracebacks lines with pointing arrow, leading numbers... |
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135 | Format tracebacks lines with pointing arrow, leading numbers... | |
136 |
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136 | |||
137 | Parameters |
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137 | Parameters | |
138 | ---------- |
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138 | ---------- | |
139 | lines : list[Line] |
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139 | lines : list[Line] | |
140 | Colors |
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140 | Colors | |
141 | ColorScheme used. |
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141 | ColorScheme used. | |
142 | lvals : str |
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142 | lvals : str | |
143 | Values of local variables, already colored, to inject just after the error line. |
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143 | Values of local variables, already colored, to inject just after the error line. | |
144 | """ |
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144 | """ | |
145 | numbers_width = INDENT_SIZE - 1 |
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145 | numbers_width = INDENT_SIZE - 1 | |
146 | res = [] |
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146 | res = [] | |
147 |
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147 | |||
148 | for stack_line in lines: |
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148 | for stack_line in lines: | |
149 | if stack_line is stack_data.LINE_GAP: |
|
149 | if stack_line is stack_data.LINE_GAP: | |
150 | res.append('%s (...)%s\n' % (Colors.linenoEm, Colors.Normal)) |
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150 | res.append('%s (...)%s\n' % (Colors.linenoEm, Colors.Normal)) | |
151 | continue |
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151 | continue | |
152 |
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152 | |||
153 | line = stack_line.render(pygmented=has_colors).rstrip('\n') + '\n' |
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153 | line = stack_line.render(pygmented=has_colors).rstrip('\n') + '\n' | |
154 | lineno = stack_line.lineno |
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154 | lineno = stack_line.lineno | |
155 | if stack_line.is_current: |
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155 | if stack_line.is_current: | |
156 | # This is the line with the error |
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156 | # This is the line with the error | |
157 | pad = numbers_width - len(str(lineno)) |
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157 | pad = numbers_width - len(str(lineno)) | |
158 | num = '%s%s' % (debugger.make_arrow(pad), str(lineno)) |
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158 | num = '%s%s' % (debugger.make_arrow(pad), str(lineno)) | |
159 | start_color = Colors.linenoEm |
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159 | start_color = Colors.linenoEm | |
160 | else: |
|
160 | else: | |
161 | num = '%*s' % (numbers_width, lineno) |
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161 | num = '%*s' % (numbers_width, lineno) | |
162 | start_color = Colors.lineno |
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162 | start_color = Colors.lineno | |
163 |
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163 | |||
164 | line = '%s%s%s %s' % (start_color, num, Colors.Normal, line) |
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164 | line = '%s%s%s %s' % (start_color, num, Colors.Normal, line) | |
165 |
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165 | |||
166 | res.append(line) |
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166 | res.append(line) | |
167 | if lvals and stack_line.is_current: |
|
167 | if lvals and stack_line.is_current: | |
168 | res.append(lvals + '\n') |
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168 | res.append(lvals + '\n') | |
169 | return res |
|
169 | return res | |
170 |
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170 | |||
171 |
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171 | |||
172 | def _format_filename(file, ColorFilename, ColorNormal): |
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172 | def _format_filename(file, ColorFilename, ColorNormal): | |
173 | """ |
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173 | """ | |
174 | Format filename lines with `In [n]` if it's the nth code cell or `File *.py` if it's a module. |
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174 | Format filename lines with `In [n]` if it's the nth code cell or `File *.py` if it's a module. | |
175 |
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175 | |||
176 | Parameters |
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176 | Parameters | |
177 | ---------- |
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177 | ---------- | |
178 | file : str |
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178 | file : str | |
179 | ColorFilename |
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179 | ColorFilename | |
180 | ColorScheme's filename coloring to be used. |
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180 | ColorScheme's filename coloring to be used. | |
181 | ColorNormal |
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181 | ColorNormal | |
182 | ColorScheme's normal coloring to be used. |
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182 | ColorScheme's normal coloring to be used. | |
183 | """ |
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183 | """ | |
184 | ipinst = get_ipython() |
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184 | ipinst = get_ipython() | |
185 |
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185 | |||
186 | if ipinst is not None and file in ipinst.compile._filename_map: |
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186 | if ipinst is not None and file in ipinst.compile._filename_map: | |
187 | file = "[%s]" % ipinst.compile._filename_map[file] |
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187 | file = "[%s]" % ipinst.compile._filename_map[file] | |
188 | tpl_link = "In %s%%s%s" % (ColorFilename, ColorNormal) |
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188 | tpl_link = "In %s%%s%s" % (ColorFilename, ColorNormal) | |
189 | else: |
|
189 | else: | |
190 | file = util_path.compress_user( |
|
190 | file = util_path.compress_user( | |
191 | py3compat.cast_unicode(file, util_path.fs_encoding) |
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191 | py3compat.cast_unicode(file, util_path.fs_encoding) | |
192 | ) |
|
192 | ) | |
193 | tpl_link = "File %s%%s%s" % (ColorFilename, ColorNormal) |
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193 | tpl_link = "File %s%%s%s" % (ColorFilename, ColorNormal) | |
194 |
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194 | |||
195 | return tpl_link % file |
|
195 | return tpl_link % file | |
196 |
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196 | |||
197 | #--------------------------------------------------------------------------- |
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197 | #--------------------------------------------------------------------------- | |
198 | # Module classes |
|
198 | # Module classes | |
199 | class TBTools(colorable.Colorable): |
|
199 | class TBTools(colorable.Colorable): | |
200 | """Basic tools used by all traceback printer classes.""" |
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200 | """Basic tools used by all traceback printer classes.""" | |
201 |
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201 | |||
202 | # Number of frames to skip when reporting tracebacks |
|
202 | # Number of frames to skip when reporting tracebacks | |
203 | tb_offset = 0 |
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203 | tb_offset = 0 | |
204 |
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204 | |||
205 | def __init__(self, color_scheme='NoColor', call_pdb=False, ostream=None, parent=None, config=None): |
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205 | def __init__(self, color_scheme='NoColor', call_pdb=False, ostream=None, parent=None, config=None): | |
206 | # Whether to call the interactive pdb debugger after printing |
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206 | # Whether to call the interactive pdb debugger after printing | |
207 | # tracebacks or not |
|
207 | # tracebacks or not | |
208 | super(TBTools, self).__init__(parent=parent, config=config) |
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208 | super(TBTools, self).__init__(parent=parent, config=config) | |
209 | self.call_pdb = call_pdb |
|
209 | self.call_pdb = call_pdb | |
210 |
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210 | |||
211 | # Output stream to write to. Note that we store the original value in |
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211 | # Output stream to write to. Note that we store the original value in | |
212 | # a private attribute and then make the public ostream a property, so |
|
212 | # a private attribute and then make the public ostream a property, so | |
213 | # that we can delay accessing sys.stdout until runtime. The way |
|
213 | # that we can delay accessing sys.stdout until runtime. The way | |
214 | # things are written now, the sys.stdout object is dynamically managed |
|
214 | # things are written now, the sys.stdout object is dynamically managed | |
215 | # so a reference to it should NEVER be stored statically. This |
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215 | # so a reference to it should NEVER be stored statically. This | |
216 | # property approach confines this detail to a single location, and all |
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216 | # property approach confines this detail to a single location, and all | |
217 | # subclasses can simply access self.ostream for writing. |
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217 | # subclasses can simply access self.ostream for writing. | |
218 | self._ostream = ostream |
|
218 | self._ostream = ostream | |
219 |
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219 | |||
220 | # Create color table |
|
220 | # Create color table | |
221 | self.color_scheme_table = exception_colors() |
|
221 | self.color_scheme_table = exception_colors() | |
222 |
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222 | |||
223 | self.set_colors(color_scheme) |
|
223 | self.set_colors(color_scheme) | |
224 | self.old_scheme = color_scheme # save initial value for toggles |
|
224 | self.old_scheme = color_scheme # save initial value for toggles | |
225 |
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225 | |||
226 | if call_pdb: |
|
226 | if call_pdb: | |
227 | self.pdb = debugger.Pdb() |
|
227 | self.pdb = debugger.Pdb() | |
228 | else: |
|
228 | else: | |
229 | self.pdb = None |
|
229 | self.pdb = None | |
230 |
|
230 | |||
231 | def _get_ostream(self): |
|
231 | def _get_ostream(self): | |
232 | """Output stream that exceptions are written to. |
|
232 | """Output stream that exceptions are written to. | |
233 |
|
233 | |||
234 | Valid values are: |
|
234 | Valid values are: | |
235 |
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235 | |||
236 | - None: the default, which means that IPython will dynamically resolve |
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236 | - None: the default, which means that IPython will dynamically resolve | |
237 | to sys.stdout. This ensures compatibility with most tools, including |
|
237 | to sys.stdout. This ensures compatibility with most tools, including | |
238 | Windows (where plain stdout doesn't recognize ANSI escapes). |
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238 | Windows (where plain stdout doesn't recognize ANSI escapes). | |
239 |
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239 | |||
240 | - Any object with 'write' and 'flush' attributes. |
|
240 | - Any object with 'write' and 'flush' attributes. | |
241 | """ |
|
241 | """ | |
242 | return sys.stdout if self._ostream is None else self._ostream |
|
242 | return sys.stdout if self._ostream is None else self._ostream | |
243 |
|
243 | |||
244 | def _set_ostream(self, val): |
|
244 | def _set_ostream(self, val): | |
245 | assert val is None or (hasattr(val, 'write') and hasattr(val, 'flush')) |
|
245 | assert val is None or (hasattr(val, 'write') and hasattr(val, 'flush')) | |
246 | self._ostream = val |
|
246 | self._ostream = val | |
247 |
|
247 | |||
248 | ostream = property(_get_ostream, _set_ostream) |
|
248 | ostream = property(_get_ostream, _set_ostream) | |
249 |
|
249 | |||
250 | def get_parts_of_chained_exception(self, evalue): |
|
250 | def get_parts_of_chained_exception(self, evalue): | |
251 | def get_chained_exception(exception_value): |
|
251 | def get_chained_exception(exception_value): | |
252 | cause = getattr(exception_value, '__cause__', None) |
|
252 | cause = getattr(exception_value, '__cause__', None) | |
253 | if cause: |
|
253 | if cause: | |
254 | return cause |
|
254 | return cause | |
255 | if getattr(exception_value, '__suppress_context__', False): |
|
255 | if getattr(exception_value, '__suppress_context__', False): | |
256 | return None |
|
256 | return None | |
257 | return getattr(exception_value, '__context__', None) |
|
257 | return getattr(exception_value, '__context__', None) | |
258 |
|
258 | |||
259 | chained_evalue = get_chained_exception(evalue) |
|
259 | chained_evalue = get_chained_exception(evalue) | |
260 |
|
260 | |||
261 | if chained_evalue: |
|
261 | if chained_evalue: | |
262 | return chained_evalue.__class__, chained_evalue, chained_evalue.__traceback__ |
|
262 | return chained_evalue.__class__, chained_evalue, chained_evalue.__traceback__ | |
263 |
|
263 | |||
264 | def prepare_chained_exception_message(self, cause): |
|
264 | def prepare_chained_exception_message(self, cause): | |
265 | direct_cause = "\nThe above exception was the direct cause of the following exception:\n" |
|
265 | direct_cause = "\nThe above exception was the direct cause of the following exception:\n" | |
266 | exception_during_handling = "\nDuring handling of the above exception, another exception occurred:\n" |
|
266 | exception_during_handling = "\nDuring handling of the above exception, another exception occurred:\n" | |
267 |
|
267 | |||
268 | if cause: |
|
268 | if cause: | |
269 | message = [[direct_cause]] |
|
269 | message = [[direct_cause]] | |
270 | else: |
|
270 | else: | |
271 | message = [[exception_during_handling]] |
|
271 | message = [[exception_during_handling]] | |
272 | return message |
|
272 | return message | |
273 |
|
273 | |||
274 | @property |
|
274 | @property | |
275 | def has_colors(self): |
|
275 | def has_colors(self): | |
276 | return self.color_scheme_table.active_scheme_name.lower() != "nocolor" |
|
276 | return self.color_scheme_table.active_scheme_name.lower() != "nocolor" | |
277 |
|
277 | |||
278 | def set_colors(self, *args, **kw): |
|
278 | def set_colors(self, *args, **kw): | |
279 | """Shorthand access to the color table scheme selector method.""" |
|
279 | """Shorthand access to the color table scheme selector method.""" | |
280 |
|
280 | |||
281 | # Set own color table |
|
281 | # Set own color table | |
282 | self.color_scheme_table.set_active_scheme(*args, **kw) |
|
282 | self.color_scheme_table.set_active_scheme(*args, **kw) | |
283 | # for convenience, set Colors to the active scheme |
|
283 | # for convenience, set Colors to the active scheme | |
284 | self.Colors = self.color_scheme_table.active_colors |
|
284 | self.Colors = self.color_scheme_table.active_colors | |
285 | # Also set colors of debugger |
|
285 | # Also set colors of debugger | |
286 | if hasattr(self, 'pdb') and self.pdb is not None: |
|
286 | if hasattr(self, 'pdb') and self.pdb is not None: | |
287 | self.pdb.set_colors(*args, **kw) |
|
287 | self.pdb.set_colors(*args, **kw) | |
288 |
|
288 | |||
289 | def color_toggle(self): |
|
289 | def color_toggle(self): | |
290 | """Toggle between the currently active color scheme and NoColor.""" |
|
290 | """Toggle between the currently active color scheme and NoColor.""" | |
291 |
|
291 | |||
292 | if self.color_scheme_table.active_scheme_name == 'NoColor': |
|
292 | if self.color_scheme_table.active_scheme_name == 'NoColor': | |
293 | self.color_scheme_table.set_active_scheme(self.old_scheme) |
|
293 | self.color_scheme_table.set_active_scheme(self.old_scheme) | |
294 | self.Colors = self.color_scheme_table.active_colors |
|
294 | self.Colors = self.color_scheme_table.active_colors | |
295 | else: |
|
295 | else: | |
296 | self.old_scheme = self.color_scheme_table.active_scheme_name |
|
296 | self.old_scheme = self.color_scheme_table.active_scheme_name | |
297 | self.color_scheme_table.set_active_scheme('NoColor') |
|
297 | self.color_scheme_table.set_active_scheme('NoColor') | |
298 | self.Colors = self.color_scheme_table.active_colors |
|
298 | self.Colors = self.color_scheme_table.active_colors | |
299 |
|
299 | |||
300 | def stb2text(self, stb): |
|
300 | def stb2text(self, stb): | |
301 | """Convert a structured traceback (a list) to a string.""" |
|
301 | """Convert a structured traceback (a list) to a string.""" | |
302 | return '\n'.join(stb) |
|
302 | return '\n'.join(stb) | |
303 |
|
303 | |||
304 | def text(self, etype, value, tb, tb_offset=None, context=5): |
|
304 | def text(self, etype, value, tb, tb_offset=None, context=5): | |
305 | """Return formatted traceback. |
|
305 | """Return formatted traceback. | |
306 |
|
306 | |||
307 | Subclasses may override this if they add extra arguments. |
|
307 | Subclasses may override this if they add extra arguments. | |
308 | """ |
|
308 | """ | |
309 | tb_list = self.structured_traceback(etype, value, tb, |
|
309 | tb_list = self.structured_traceback(etype, value, tb, | |
310 | tb_offset, context) |
|
310 | tb_offset, context) | |
311 | return self.stb2text(tb_list) |
|
311 | return self.stb2text(tb_list) | |
312 |
|
312 | |||
313 | def structured_traceback(self, etype, evalue, tb, tb_offset=None, |
|
313 | def structured_traceback(self, etype, evalue, tb, tb_offset=None, | |
314 | context=5, mode=None): |
|
314 | context=5, mode=None): | |
315 | """Return a list of traceback frames. |
|
315 | """Return a list of traceback frames. | |
316 |
|
316 | |||
317 | Must be implemented by each class. |
|
317 | Must be implemented by each class. | |
318 | """ |
|
318 | """ | |
319 | raise NotImplementedError() |
|
319 | raise NotImplementedError() | |
320 |
|
320 | |||
321 |
|
321 | |||
322 | #--------------------------------------------------------------------------- |
|
322 | #--------------------------------------------------------------------------- | |
323 | class ListTB(TBTools): |
|
323 | class ListTB(TBTools): | |
324 | """Print traceback information from a traceback list, with optional color. |
|
324 | """Print traceback information from a traceback list, with optional color. | |
325 |
|
325 | |||
326 | Calling requires 3 arguments: (etype, evalue, elist) |
|
326 | Calling requires 3 arguments: (etype, evalue, elist) | |
327 | as would be obtained by:: |
|
327 | as would be obtained by:: | |
328 |
|
328 | |||
329 | etype, evalue, tb = sys.exc_info() |
|
329 | etype, evalue, tb = sys.exc_info() | |
330 | if tb: |
|
330 | if tb: | |
331 | elist = traceback.extract_tb(tb) |
|
331 | elist = traceback.extract_tb(tb) | |
332 | else: |
|
332 | else: | |
333 | elist = None |
|
333 | elist = None | |
334 |
|
334 | |||
335 | It can thus be used by programs which need to process the traceback before |
|
335 | It can thus be used by programs which need to process the traceback before | |
336 | printing (such as console replacements based on the code module from the |
|
336 | printing (such as console replacements based on the code module from the | |
337 | standard library). |
|
337 | standard library). | |
338 |
|
338 | |||
339 | Because they are meant to be called without a full traceback (only a |
|
339 | Because they are meant to be called without a full traceback (only a | |
340 | list), instances of this class can't call the interactive pdb debugger.""" |
|
340 | list), instances of this class can't call the interactive pdb debugger.""" | |
341 |
|
341 | |||
342 | def __init__(self, color_scheme='NoColor', call_pdb=False, ostream=None, parent=None, config=None): |
|
342 | def __init__(self, color_scheme='NoColor', call_pdb=False, ostream=None, parent=None, config=None): | |
343 | TBTools.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, |
|
343 | TBTools.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, | |
344 | ostream=ostream, parent=parent,config=config) |
|
344 | ostream=ostream, parent=parent,config=config) | |
345 |
|
345 | |||
346 | def __call__(self, etype, value, elist): |
|
346 | def __call__(self, etype, value, elist): | |
347 | self.ostream.flush() |
|
347 | self.ostream.flush() | |
348 | self.ostream.write(self.text(etype, value, elist)) |
|
348 | self.ostream.write(self.text(etype, value, elist)) | |
349 | self.ostream.write('\n') |
|
349 | self.ostream.write('\n') | |
350 |
|
350 | |||
351 | def _extract_tb(self, tb): |
|
351 | def _extract_tb(self, tb): | |
352 | if tb: |
|
352 | if tb: | |
353 | return traceback.extract_tb(tb) |
|
353 | return traceback.extract_tb(tb) | |
354 | else: |
|
354 | else: | |
355 | return None |
|
355 | return None | |
356 |
|
356 | |||
357 | def structured_traceback(self, etype, evalue, etb=None, tb_offset=None, |
|
357 | def structured_traceback(self, etype, evalue, etb=None, tb_offset=None, | |
358 | context=5): |
|
358 | context=5): | |
359 | """Return a color formatted string with the traceback info. |
|
359 | """Return a color formatted string with the traceback info. | |
360 |
|
360 | |||
361 | Parameters |
|
361 | Parameters | |
362 | ---------- |
|
362 | ---------- | |
363 | etype : exception type |
|
363 | etype : exception type | |
364 | Type of the exception raised. |
|
364 | Type of the exception raised. | |
365 | evalue : object |
|
365 | evalue : object | |
366 | Data stored in the exception |
|
366 | Data stored in the exception | |
367 | etb : object |
|
367 | etb : object | |
368 | If list: List of frames, see class docstring for details. |
|
368 | If list: List of frames, see class docstring for details. | |
369 | If Traceback: Traceback of the exception. |
|
369 | If Traceback: Traceback of the exception. | |
370 | tb_offset : int, optional |
|
370 | tb_offset : int, optional | |
371 | Number of frames in the traceback to skip. If not given, the |
|
371 | Number of frames in the traceback to skip. If not given, the | |
372 | instance evalue is used (set in constructor). |
|
372 | instance evalue is used (set in constructor). | |
373 | context : int, optional |
|
373 | context : int, optional | |
374 | Number of lines of context information to print. |
|
374 | Number of lines of context information to print. | |
375 |
|
375 | |||
376 | Returns |
|
376 | Returns | |
377 | ------- |
|
377 | ------- | |
378 | String with formatted exception. |
|
378 | String with formatted exception. | |
379 | """ |
|
379 | """ | |
380 | # This is a workaround to get chained_exc_ids in recursive calls |
|
380 | # This is a workaround to get chained_exc_ids in recursive calls | |
381 | # etb should not be a tuple if structured_traceback is not recursive |
|
381 | # etb should not be a tuple if structured_traceback is not recursive | |
382 | if isinstance(etb, tuple): |
|
382 | if isinstance(etb, tuple): | |
383 | etb, chained_exc_ids = etb |
|
383 | etb, chained_exc_ids = etb | |
384 | else: |
|
384 | else: | |
385 | chained_exc_ids = set() |
|
385 | chained_exc_ids = set() | |
386 |
|
386 | |||
387 | if isinstance(etb, list): |
|
387 | if isinstance(etb, list): | |
388 | elist = etb |
|
388 | elist = etb | |
389 | elif etb is not None: |
|
389 | elif etb is not None: | |
390 | elist = self._extract_tb(etb) |
|
390 | elist = self._extract_tb(etb) | |
391 | else: |
|
391 | else: | |
392 | elist = [] |
|
392 | elist = [] | |
393 | tb_offset = self.tb_offset if tb_offset is None else tb_offset |
|
393 | tb_offset = self.tb_offset if tb_offset is None else tb_offset | |
394 | Colors = self.Colors |
|
394 | Colors = self.Colors | |
395 | out_list = [] |
|
395 | out_list = [] | |
396 | if elist: |
|
396 | if elist: | |
397 |
|
397 | |||
398 | if tb_offset and len(elist) > tb_offset: |
|
398 | if tb_offset and len(elist) > tb_offset: | |
399 | elist = elist[tb_offset:] |
|
399 | elist = elist[tb_offset:] | |
400 |
|
400 | |||
401 | out_list.append('Traceback %s(most recent call last)%s:' % |
|
401 | out_list.append('Traceback %s(most recent call last)%s:' % | |
402 | (Colors.normalEm, Colors.Normal) + '\n') |
|
402 | (Colors.normalEm, Colors.Normal) + '\n') | |
403 | out_list.extend(self._format_list(elist)) |
|
403 | out_list.extend(self._format_list(elist)) | |
404 | # The exception info should be a single entry in the list. |
|
404 | # The exception info should be a single entry in the list. | |
405 | lines = ''.join(self._format_exception_only(etype, evalue)) |
|
405 | lines = ''.join(self._format_exception_only(etype, evalue)) | |
406 | out_list.append(lines) |
|
406 | out_list.append(lines) | |
407 |
|
407 | |||
408 | exception = self.get_parts_of_chained_exception(evalue) |
|
408 | exception = self.get_parts_of_chained_exception(evalue) | |
409 |
|
409 | |||
410 | if exception and not id(exception[1]) in chained_exc_ids: |
|
410 | if exception and not id(exception[1]) in chained_exc_ids: | |
411 | chained_exception_message = self.prepare_chained_exception_message( |
|
411 | chained_exception_message = self.prepare_chained_exception_message( | |
412 | evalue.__cause__)[0] |
|
412 | evalue.__cause__)[0] | |
413 | etype, evalue, etb = exception |
|
413 | etype, evalue, etb = exception | |
414 | # Trace exception to avoid infinite 'cause' loop |
|
414 | # Trace exception to avoid infinite 'cause' loop | |
415 | chained_exc_ids.add(id(exception[1])) |
|
415 | chained_exc_ids.add(id(exception[1])) | |
416 | chained_exceptions_tb_offset = 0 |
|
416 | chained_exceptions_tb_offset = 0 | |
417 | out_list = ( |
|
417 | out_list = ( | |
418 | self.structured_traceback( |
|
418 | self.structured_traceback( | |
419 | etype, evalue, (etb, chained_exc_ids), |
|
419 | etype, evalue, (etb, chained_exc_ids), | |
420 | chained_exceptions_tb_offset, context) |
|
420 | chained_exceptions_tb_offset, context) | |
421 | + chained_exception_message |
|
421 | + chained_exception_message | |
422 | + out_list) |
|
422 | + out_list) | |
423 |
|
423 | |||
424 | return out_list |
|
424 | return out_list | |
425 |
|
425 | |||
426 | def _format_list(self, extracted_list): |
|
426 | def _format_list(self, extracted_list): | |
427 | """Format a list of traceback entry tuples for printing. |
|
427 | """Format a list of traceback entry tuples for printing. | |
428 |
|
428 | |||
429 | Given a list of tuples as returned by extract_tb() or |
|
429 | Given a list of tuples as returned by extract_tb() or | |
430 | extract_stack(), return a list of strings ready for printing. |
|
430 | extract_stack(), return a list of strings ready for printing. | |
431 | Each string in the resulting list corresponds to the item with the |
|
431 | Each string in the resulting list corresponds to the item with the | |
432 | same index in the argument list. Each string ends in a newline; |
|
432 | same index in the argument list. Each string ends in a newline; | |
433 | the strings may contain internal newlines as well, for those items |
|
433 | the strings may contain internal newlines as well, for those items | |
434 | whose source text line is not None. |
|
434 | whose source text line is not None. | |
435 |
|
435 | |||
436 | Lifted almost verbatim from traceback.py |
|
436 | Lifted almost verbatim from traceback.py | |
437 | """ |
|
437 | """ | |
438 |
|
438 | |||
439 | Colors = self.Colors |
|
439 | Colors = self.Colors | |
440 | list = [] |
|
440 | list = [] | |
441 | for filename, lineno, name, line in extracted_list[:-1]: |
|
441 | for filename, lineno, name, line in extracted_list[:-1]: | |
442 | item = " %s, line %s%d%s, in %s%s%s\n" % ( |
|
442 | item = " %s, line %s%d%s, in %s%s%s\n" % ( | |
443 | _format_filename(filename, Colors.filename, Colors.Normal), |
|
443 | _format_filename(filename, Colors.filename, Colors.Normal), | |
444 | Colors.lineno, |
|
444 | Colors.lineno, | |
445 | lineno, |
|
445 | lineno, | |
446 | Colors.Normal, |
|
446 | Colors.Normal, | |
447 | Colors.name, |
|
447 | Colors.name, | |
448 | name, |
|
448 | name, | |
449 | Colors.Normal, |
|
449 | Colors.Normal, | |
450 | ) |
|
450 | ) | |
451 | if line: |
|
451 | if line: | |
452 | item += ' %s\n' % line.strip() |
|
452 | item += ' %s\n' % line.strip() | |
453 | list.append(item) |
|
453 | list.append(item) | |
454 | # Emphasize the last entry |
|
454 | # Emphasize the last entry | |
455 | filename, lineno, name, line = extracted_list[-1] |
|
455 | filename, lineno, name, line = extracted_list[-1] | |
456 | item = "%s %s, line %s%d%s, in %s%s%s%s\n" % ( |
|
456 | item = "%s %s, line %s%d%s, in %s%s%s%s\n" % ( | |
457 | Colors.normalEm, |
|
457 | Colors.normalEm, | |
458 | _format_filename(filename, Colors.filenameEm, Colors.normalEm), |
|
458 | _format_filename(filename, Colors.filenameEm, Colors.normalEm), | |
459 | Colors.linenoEm, |
|
459 | Colors.linenoEm, | |
460 | lineno, |
|
460 | lineno, | |
461 | Colors.normalEm, |
|
461 | Colors.normalEm, | |
462 | Colors.nameEm, |
|
462 | Colors.nameEm, | |
463 | name, |
|
463 | name, | |
464 | Colors.normalEm, |
|
464 | Colors.normalEm, | |
465 | Colors.Normal, |
|
465 | Colors.Normal, | |
466 | ) |
|
466 | ) | |
467 | if line: |
|
467 | if line: | |
468 | item += '%s %s%s\n' % (Colors.line, line.strip(), |
|
468 | item += '%s %s%s\n' % (Colors.line, line.strip(), | |
469 | Colors.Normal) |
|
469 | Colors.Normal) | |
470 | list.append(item) |
|
470 | list.append(item) | |
471 | return list |
|
471 | return list | |
472 |
|
472 | |||
473 | def _format_exception_only(self, etype, value): |
|
473 | def _format_exception_only(self, etype, value): | |
474 | """Format the exception part of a traceback. |
|
474 | """Format the exception part of a traceback. | |
475 |
|
475 | |||
476 | The arguments are the exception type and value such as given by |
|
476 | The arguments are the exception type and value such as given by | |
477 | sys.exc_info()[:2]. The return value is a list of strings, each ending |
|
477 | sys.exc_info()[:2]. The return value is a list of strings, each ending | |
478 | in a newline. Normally, the list contains a single string; however, |
|
478 | in a newline. Normally, the list contains a single string; however, | |
479 | for SyntaxError exceptions, it contains several lines that (when |
|
479 | for SyntaxError exceptions, it contains several lines that (when | |
480 | printed) display detailed information about where the syntax error |
|
480 | printed) display detailed information about where the syntax error | |
481 | occurred. The message indicating which exception occurred is the |
|
481 | occurred. The message indicating which exception occurred is the | |
482 | always last string in the list. |
|
482 | always last string in the list. | |
483 |
|
483 | |||
484 | Also lifted nearly verbatim from traceback.py |
|
484 | Also lifted nearly verbatim from traceback.py | |
485 | """ |
|
485 | """ | |
486 | have_filedata = False |
|
486 | have_filedata = False | |
487 | Colors = self.Colors |
|
487 | Colors = self.Colors | |
488 | list = [] |
|
488 | list = [] | |
489 | stype = py3compat.cast_unicode(Colors.excName + etype.__name__ + Colors.Normal) |
|
489 | stype = py3compat.cast_unicode(Colors.excName + etype.__name__ + Colors.Normal) | |
490 | if value is None: |
|
490 | if value is None: | |
491 | # Not sure if this can still happen in Python 2.6 and above |
|
491 | # Not sure if this can still happen in Python 2.6 and above | |
492 | list.append(stype + '\n') |
|
492 | list.append(stype + '\n') | |
493 | else: |
|
493 | else: | |
494 | if issubclass(etype, SyntaxError): |
|
494 | if issubclass(etype, SyntaxError): | |
495 | have_filedata = True |
|
495 | have_filedata = True | |
496 | if not value.filename: value.filename = "<string>" |
|
496 | if not value.filename: value.filename = "<string>" | |
497 | if value.lineno: |
|
497 | if value.lineno: | |
498 | lineno = value.lineno |
|
498 | lineno = value.lineno | |
499 | textline = linecache.getline(value.filename, value.lineno) |
|
499 | textline = linecache.getline(value.filename, value.lineno) | |
500 | else: |
|
500 | else: | |
501 | lineno = "unknown" |
|
501 | lineno = "unknown" | |
502 | textline = "" |
|
502 | textline = "" | |
503 | list.append( |
|
503 | list.append( | |
504 | "%s %s, line %s%s%s\n" |
|
504 | "%s %s, line %s%s%s\n" | |
505 | % ( |
|
505 | % ( | |
506 | Colors.normalEm, |
|
506 | Colors.normalEm, | |
507 |
_format_filename( |
|
507 | _format_filename( | |
|
508 | value.filename, Colors.filenameEm, Colors.normalEm | |||
|
509 | ), | |||
508 | Colors.linenoEm, |
|
510 | Colors.linenoEm, | |
509 | lineno, |
|
511 | lineno, | |
510 | Colors.Normal, |
|
512 | Colors.Normal, | |
511 | ) |
|
513 | ) | |
512 | ) |
|
514 | ) | |
513 | if textline == "": |
|
515 | if textline == "": | |
514 | textline = py3compat.cast_unicode(value.text, "utf-8") |
|
516 | textline = py3compat.cast_unicode(value.text, "utf-8") | |
515 |
|
517 | |||
516 | if textline is not None: |
|
518 | if textline is not None: | |
517 | i = 0 |
|
519 | i = 0 | |
518 | while i < len(textline) and textline[i].isspace(): |
|
520 | while i < len(textline) and textline[i].isspace(): | |
519 | i += 1 |
|
521 | i += 1 | |
520 | list.append('%s %s%s\n' % (Colors.line, |
|
522 | list.append('%s %s%s\n' % (Colors.line, | |
521 | textline.strip(), |
|
523 | textline.strip(), | |
522 | Colors.Normal)) |
|
524 | Colors.Normal)) | |
523 | if value.offset is not None: |
|
525 | if value.offset is not None: | |
524 | s = ' ' |
|
526 | s = ' ' | |
525 | for c in textline[i:value.offset - 1]: |
|
527 | for c in textline[i:value.offset - 1]: | |
526 | if c.isspace(): |
|
528 | if c.isspace(): | |
527 | s += c |
|
529 | s += c | |
528 | else: |
|
530 | else: | |
529 | s += ' ' |
|
531 | s += ' ' | |
530 | list.append('%s%s^%s\n' % (Colors.caret, s, |
|
532 | list.append('%s%s^%s\n' % (Colors.caret, s, | |
531 | Colors.Normal)) |
|
533 | Colors.Normal)) | |
532 |
|
534 | |||
533 | try: |
|
535 | try: | |
534 | s = value.msg |
|
536 | s = value.msg | |
535 | except Exception: |
|
537 | except Exception: | |
536 | s = self._some_str(value) |
|
538 | s = self._some_str(value) | |
537 | if s: |
|
539 | if s: | |
538 | list.append('%s%s:%s %s\n' % (stype, Colors.excName, |
|
540 | list.append('%s%s:%s %s\n' % (stype, Colors.excName, | |
539 | Colors.Normal, s)) |
|
541 | Colors.Normal, s)) | |
540 | else: |
|
542 | else: | |
541 | list.append('%s\n' % stype) |
|
543 | list.append('%s\n' % stype) | |
542 |
|
544 | |||
543 | # sync with user hooks |
|
545 | # sync with user hooks | |
544 | if have_filedata: |
|
546 | if have_filedata: | |
545 | ipinst = get_ipython() |
|
547 | ipinst = get_ipython() | |
546 | if ipinst is not None: |
|
548 | if ipinst is not None: | |
547 | ipinst.hooks.synchronize_with_editor(value.filename, value.lineno, 0) |
|
549 | ipinst.hooks.synchronize_with_editor(value.filename, value.lineno, 0) | |
548 |
|
550 | |||
549 | return list |
|
551 | return list | |
550 |
|
552 | |||
551 | def get_exception_only(self, etype, value): |
|
553 | def get_exception_only(self, etype, value): | |
552 | """Only print the exception type and message, without a traceback. |
|
554 | """Only print the exception type and message, without a traceback. | |
553 |
|
555 | |||
554 | Parameters |
|
556 | Parameters | |
555 | ---------- |
|
557 | ---------- | |
556 | etype : exception type |
|
558 | etype : exception type | |
557 | evalue : exception value |
|
559 | evalue : exception value | |
558 | """ |
|
560 | """ | |
559 | return ListTB.structured_traceback(self, etype, value) |
|
561 | return ListTB.structured_traceback(self, etype, value) | |
560 |
|
562 | |||
561 | def show_exception_only(self, etype, evalue): |
|
563 | def show_exception_only(self, etype, evalue): | |
562 | """Only print the exception type and message, without a traceback. |
|
564 | """Only print the exception type and message, without a traceback. | |
563 |
|
565 | |||
564 | Parameters |
|
566 | Parameters | |
565 | ---------- |
|
567 | ---------- | |
566 | etype : exception type |
|
568 | etype : exception type | |
567 | evalue : exception value |
|
569 | evalue : exception value | |
568 | """ |
|
570 | """ | |
569 | # This method needs to use __call__ from *this* class, not the one from |
|
571 | # This method needs to use __call__ from *this* class, not the one from | |
570 | # a subclass whose signature or behavior may be different |
|
572 | # a subclass whose signature or behavior may be different | |
571 | ostream = self.ostream |
|
573 | ostream = self.ostream | |
572 | ostream.flush() |
|
574 | ostream.flush() | |
573 | ostream.write('\n'.join(self.get_exception_only(etype, evalue))) |
|
575 | ostream.write('\n'.join(self.get_exception_only(etype, evalue))) | |
574 | ostream.flush() |
|
576 | ostream.flush() | |
575 |
|
577 | |||
576 | def _some_str(self, value): |
|
578 | def _some_str(self, value): | |
577 | # Lifted from traceback.py |
|
579 | # Lifted from traceback.py | |
578 | try: |
|
580 | try: | |
579 | return py3compat.cast_unicode(str(value)) |
|
581 | return py3compat.cast_unicode(str(value)) | |
580 | except: |
|
582 | except: | |
581 | return u'<unprintable %s object>' % type(value).__name__ |
|
583 | return u'<unprintable %s object>' % type(value).__name__ | |
582 |
|
584 | |||
583 |
|
585 | |||
584 | #---------------------------------------------------------------------------- |
|
586 | #---------------------------------------------------------------------------- | |
585 | class VerboseTB(TBTools): |
|
587 | class VerboseTB(TBTools): | |
586 | """A port of Ka-Ping Yee's cgitb.py module that outputs color text instead |
|
588 | """A port of Ka-Ping Yee's cgitb.py module that outputs color text instead | |
587 | of HTML. Requires inspect and pydoc. Crazy, man. |
|
589 | of HTML. Requires inspect and pydoc. Crazy, man. | |
588 |
|
590 | |||
589 | Modified version which optionally strips the topmost entries from the |
|
591 | Modified version which optionally strips the topmost entries from the | |
590 | traceback, to be used with alternate interpreters (because their own code |
|
592 | traceback, to be used with alternate interpreters (because their own code | |
591 | would appear in the traceback).""" |
|
593 | would appear in the traceback).""" | |
592 |
|
594 | |||
593 | def __init__(self, color_scheme='Linux', call_pdb=False, ostream=None, |
|
595 | def __init__(self, color_scheme='Linux', call_pdb=False, ostream=None, | |
594 | tb_offset=0, long_header=False, include_vars=True, |
|
596 | tb_offset=0, long_header=False, include_vars=True, | |
595 | check_cache=None, debugger_cls = None, |
|
597 | check_cache=None, debugger_cls = None, | |
596 | parent=None, config=None): |
|
598 | parent=None, config=None): | |
597 | """Specify traceback offset, headers and color scheme. |
|
599 | """Specify traceback offset, headers and color scheme. | |
598 |
|
600 | |||
599 | Define how many frames to drop from the tracebacks. Calling it with |
|
601 | Define how many frames to drop from the tracebacks. Calling it with | |
600 | tb_offset=1 allows use of this handler in interpreters which will have |
|
602 | tb_offset=1 allows use of this handler in interpreters which will have | |
601 | their own code at the top of the traceback (VerboseTB will first |
|
603 | their own code at the top of the traceback (VerboseTB will first | |
602 | remove that frame before printing the traceback info).""" |
|
604 | remove that frame before printing the traceback info).""" | |
603 | TBTools.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, |
|
605 | TBTools.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, | |
604 | ostream=ostream, parent=parent, config=config) |
|
606 | ostream=ostream, parent=parent, config=config) | |
605 | self.tb_offset = tb_offset |
|
607 | self.tb_offset = tb_offset | |
606 | self.long_header = long_header |
|
608 | self.long_header = long_header | |
607 | self.include_vars = include_vars |
|
609 | self.include_vars = include_vars | |
608 | # By default we use linecache.checkcache, but the user can provide a |
|
610 | # By default we use linecache.checkcache, but the user can provide a | |
609 | # different check_cache implementation. This is used by the IPython |
|
611 | # different check_cache implementation. This is used by the IPython | |
610 | # kernel to provide tracebacks for interactive code that is cached, |
|
612 | # kernel to provide tracebacks for interactive code that is cached, | |
611 | # by a compiler instance that flushes the linecache but preserves its |
|
613 | # by a compiler instance that flushes the linecache but preserves its | |
612 | # own code cache. |
|
614 | # own code cache. | |
613 | if check_cache is None: |
|
615 | if check_cache is None: | |
614 | check_cache = linecache.checkcache |
|
616 | check_cache = linecache.checkcache | |
615 | self.check_cache = check_cache |
|
617 | self.check_cache = check_cache | |
616 |
|
618 | |||
617 | self.debugger_cls = debugger_cls or debugger.Pdb |
|
619 | self.debugger_cls = debugger_cls or debugger.Pdb | |
618 | self.skip_hidden = True |
|
620 | self.skip_hidden = True | |
619 |
|
621 | |||
620 | def format_record(self, frame_info): |
|
622 | def format_record(self, frame_info): | |
621 | """Format a single stack frame""" |
|
623 | """Format a single stack frame""" | |
622 | Colors = self.Colors # just a shorthand + quicker name lookup |
|
624 | Colors = self.Colors # just a shorthand + quicker name lookup | |
623 | ColorsNormal = Colors.Normal # used a lot |
|
625 | ColorsNormal = Colors.Normal # used a lot | |
624 |
|
626 | |||
625 | if isinstance(frame_info, stack_data.RepeatedFrames): |
|
627 | if isinstance(frame_info, stack_data.RepeatedFrames): | |
626 | return ' %s[... skipping similar frames: %s]%s\n' % ( |
|
628 | return ' %s[... skipping similar frames: %s]%s\n' % ( | |
627 | Colors.excName, frame_info.description, ColorsNormal) |
|
629 | Colors.excName, frame_info.description, ColorsNormal) | |
628 |
|
630 | |||
629 | indent = ' ' * INDENT_SIZE |
|
631 | indent = ' ' * INDENT_SIZE | |
630 | em_normal = '%s\n%s%s' % (Colors.valEm, indent, ColorsNormal) |
|
632 | em_normal = '%s\n%s%s' % (Colors.valEm, indent, ColorsNormal) | |
631 | tpl_call = 'in %s%%s%s%%s%s' % (Colors.vName, Colors.valEm, |
|
633 | tpl_call = 'in %s%%s%s%%s%s' % (Colors.vName, Colors.valEm, | |
632 | ColorsNormal) |
|
634 | ColorsNormal) | |
633 | tpl_call_fail = 'in %s%%s%s(***failed resolving arguments***)%s' % \ |
|
635 | tpl_call_fail = 'in %s%%s%s(***failed resolving arguments***)%s' % \ | |
634 | (Colors.vName, Colors.valEm, ColorsNormal) |
|
636 | (Colors.vName, Colors.valEm, ColorsNormal) | |
635 | tpl_name_val = '%%s %s= %%s%s' % (Colors.valEm, ColorsNormal) |
|
637 | tpl_name_val = '%%s %s= %%s%s' % (Colors.valEm, ColorsNormal) | |
636 |
|
638 | |||
637 | link = _format_filename(frame_info.filename, Colors.filenameEm, ColorsNormal) |
|
639 | link = _format_filename(frame_info.filename, Colors.filenameEm, ColorsNormal) | |
638 | args, varargs, varkw, locals_ = inspect.getargvalues(frame_info.frame) |
|
640 | args, varargs, varkw, locals_ = inspect.getargvalues(frame_info.frame) | |
639 |
|
641 | |||
640 | func = frame_info.executing.code_qualname() |
|
642 | func = frame_info.executing.code_qualname() | |
641 | if func == '<module>': |
|
643 | if func == '<module>': | |
642 | call = tpl_call % (func, '') |
|
644 | call = tpl_call % (func, '') | |
643 | else: |
|
645 | else: | |
644 | # Decide whether to include variable details or not |
|
646 | # Decide whether to include variable details or not | |
645 | var_repr = eqrepr if self.include_vars else nullrepr |
|
647 | var_repr = eqrepr if self.include_vars else nullrepr | |
646 | try: |
|
648 | try: | |
647 | call = tpl_call % (func, inspect.formatargvalues(args, |
|
649 | call = tpl_call % (func, inspect.formatargvalues(args, | |
648 | varargs, varkw, |
|
650 | varargs, varkw, | |
649 | locals_, formatvalue=var_repr)) |
|
651 | locals_, formatvalue=var_repr)) | |
650 | except KeyError: |
|
652 | except KeyError: | |
651 | # This happens in situations like errors inside generator |
|
653 | # This happens in situations like errors inside generator | |
652 | # expressions, where local variables are listed in the |
|
654 | # expressions, where local variables are listed in the | |
653 | # line, but can't be extracted from the frame. I'm not |
|
655 | # line, but can't be extracted from the frame. I'm not | |
654 | # 100% sure this isn't actually a bug in inspect itself, |
|
656 | # 100% sure this isn't actually a bug in inspect itself, | |
655 | # but since there's no info for us to compute with, the |
|
657 | # but since there's no info for us to compute with, the | |
656 | # best we can do is report the failure and move on. Here |
|
658 | # best we can do is report the failure and move on. Here | |
657 | # we must *not* call any traceback construction again, |
|
659 | # we must *not* call any traceback construction again, | |
658 | # because that would mess up use of %debug later on. So we |
|
660 | # because that would mess up use of %debug later on. So we | |
659 | # simply report the failure and move on. The only |
|
661 | # simply report the failure and move on. The only | |
660 | # limitation will be that this frame won't have locals |
|
662 | # limitation will be that this frame won't have locals | |
661 | # listed in the call signature. Quite subtle problem... |
|
663 | # listed in the call signature. Quite subtle problem... | |
662 | # I can't think of a good way to validate this in a unit |
|
664 | # I can't think of a good way to validate this in a unit | |
663 | # test, but running a script consisting of: |
|
665 | # test, but running a script consisting of: | |
664 | # dict( (k,v.strip()) for (k,v) in range(10) ) |
|
666 | # dict( (k,v.strip()) for (k,v) in range(10) ) | |
665 | # will illustrate the error, if this exception catch is |
|
667 | # will illustrate the error, if this exception catch is | |
666 | # disabled. |
|
668 | # disabled. | |
667 | call = tpl_call_fail % func |
|
669 | call = tpl_call_fail % func | |
668 |
|
670 | |||
669 | lvals = '' |
|
671 | lvals = '' | |
670 | lvals_list = [] |
|
672 | lvals_list = [] | |
671 | if self.include_vars: |
|
673 | if self.include_vars: | |
672 | for var in frame_info.variables_in_executing_piece: |
|
674 | for var in frame_info.variables_in_executing_piece: | |
673 | lvals_list.append(tpl_name_val % (var.name, repr(var.value))) |
|
675 | lvals_list.append(tpl_name_val % (var.name, repr(var.value))) | |
674 | if lvals_list: |
|
676 | if lvals_list: | |
675 | lvals = '%s%s' % (indent, em_normal.join(lvals_list)) |
|
677 | lvals = '%s%s' % (indent, em_normal.join(lvals_list)) | |
676 |
|
678 | |||
677 | result = "%s, %s\n" % (link, call) |
|
679 | result = "%s, %s\n" % (link, call) | |
678 |
|
680 | |||
679 | result += ''.join(_format_traceback_lines(frame_info.lines, Colors, self.has_colors, lvals)) |
|
681 | result += ''.join(_format_traceback_lines(frame_info.lines, Colors, self.has_colors, lvals)) | |
680 | return result |
|
682 | return result | |
681 |
|
683 | |||
682 | def prepare_header(self, etype, long_version=False): |
|
684 | def prepare_header(self, etype, long_version=False): | |
683 | colors = self.Colors # just a shorthand + quicker name lookup |
|
685 | colors = self.Colors # just a shorthand + quicker name lookup | |
684 | colorsnormal = colors.Normal # used a lot |
|
686 | colorsnormal = colors.Normal # used a lot | |
685 | exc = '%s%s%s' % (colors.excName, etype, colorsnormal) |
|
687 | exc = '%s%s%s' % (colors.excName, etype, colorsnormal) | |
686 | width = min(75, get_terminal_size()[0]) |
|
688 | width = min(75, get_terminal_size()[0]) | |
687 | if long_version: |
|
689 | if long_version: | |
688 | # Header with the exception type, python version, and date |
|
690 | # Header with the exception type, python version, and date | |
689 | pyver = 'Python ' + sys.version.split()[0] + ': ' + sys.executable |
|
691 | pyver = 'Python ' + sys.version.split()[0] + ': ' + sys.executable | |
690 | date = time.ctime(time.time()) |
|
692 | date = time.ctime(time.time()) | |
691 |
|
693 | |||
692 | head = '%s%s%s\n%s%s%s\n%s' % (colors.topline, '-' * width, colorsnormal, |
|
694 | head = '%s%s%s\n%s%s%s\n%s' % (colors.topline, '-' * width, colorsnormal, | |
693 | exc, ' ' * (width - len(str(etype)) - len(pyver)), |
|
695 | exc, ' ' * (width - len(str(etype)) - len(pyver)), | |
694 | pyver, date.rjust(width) ) |
|
696 | pyver, date.rjust(width) ) | |
695 | head += "\nA problem occurred executing Python code. Here is the sequence of function" \ |
|
697 | head += "\nA problem occurred executing Python code. Here is the sequence of function" \ | |
696 | "\ncalls leading up to the error, with the most recent (innermost) call last." |
|
698 | "\ncalls leading up to the error, with the most recent (innermost) call last." | |
697 | else: |
|
699 | else: | |
698 | # Simplified header |
|
700 | # Simplified header | |
699 | head = '%s%s' % (exc, 'Traceback (most recent call last)'. \ |
|
701 | head = '%s%s' % (exc, 'Traceback (most recent call last)'. \ | |
700 | rjust(width - len(str(etype))) ) |
|
702 | rjust(width - len(str(etype))) ) | |
701 |
|
703 | |||
702 | return head |
|
704 | return head | |
703 |
|
705 | |||
704 | def format_exception(self, etype, evalue): |
|
706 | def format_exception(self, etype, evalue): | |
705 | colors = self.Colors # just a shorthand + quicker name lookup |
|
707 | colors = self.Colors # just a shorthand + quicker name lookup | |
706 | colorsnormal = colors.Normal # used a lot |
|
708 | colorsnormal = colors.Normal # used a lot | |
707 | # Get (safely) a string form of the exception info |
|
709 | # Get (safely) a string form of the exception info | |
708 | try: |
|
710 | try: | |
709 | etype_str, evalue_str = map(str, (etype, evalue)) |
|
711 | etype_str, evalue_str = map(str, (etype, evalue)) | |
710 | except: |
|
712 | except: | |
711 | # User exception is improperly defined. |
|
713 | # User exception is improperly defined. | |
712 | etype, evalue = str, sys.exc_info()[:2] |
|
714 | etype, evalue = str, sys.exc_info()[:2] | |
713 | etype_str, evalue_str = map(str, (etype, evalue)) |
|
715 | etype_str, evalue_str = map(str, (etype, evalue)) | |
714 | # ... and format it |
|
716 | # ... and format it | |
715 | return ['%s%s%s: %s' % (colors.excName, etype_str, |
|
717 | return ['%s%s%s: %s' % (colors.excName, etype_str, | |
716 | colorsnormal, py3compat.cast_unicode(evalue_str))] |
|
718 | colorsnormal, py3compat.cast_unicode(evalue_str))] | |
717 |
|
719 | |||
718 | def format_exception_as_a_whole(self, etype, evalue, etb, number_of_lines_of_context, tb_offset): |
|
720 | def format_exception_as_a_whole(self, etype, evalue, etb, number_of_lines_of_context, tb_offset): | |
719 | """Formats the header, traceback and exception message for a single exception. |
|
721 | """Formats the header, traceback and exception message for a single exception. | |
720 |
|
722 | |||
721 | This may be called multiple times by Python 3 exception chaining |
|
723 | This may be called multiple times by Python 3 exception chaining | |
722 | (PEP 3134). |
|
724 | (PEP 3134). | |
723 | """ |
|
725 | """ | |
724 | # some locals |
|
726 | # some locals | |
725 | orig_etype = etype |
|
727 | orig_etype = etype | |
726 | try: |
|
728 | try: | |
727 | etype = etype.__name__ |
|
729 | etype = etype.__name__ | |
728 | except AttributeError: |
|
730 | except AttributeError: | |
729 | pass |
|
731 | pass | |
730 |
|
732 | |||
731 | tb_offset = self.tb_offset if tb_offset is None else tb_offset |
|
733 | tb_offset = self.tb_offset if tb_offset is None else tb_offset | |
732 | head = self.prepare_header(etype, self.long_header) |
|
734 | head = self.prepare_header(etype, self.long_header) | |
733 | records = self.get_records(etb, number_of_lines_of_context, tb_offset) |
|
735 | records = self.get_records(etb, number_of_lines_of_context, tb_offset) | |
734 |
|
736 | |||
735 | frames = [] |
|
737 | frames = [] | |
736 | skipped = 0 |
|
738 | skipped = 0 | |
737 | lastrecord = len(records) - 1 |
|
739 | lastrecord = len(records) - 1 | |
738 | for i, r in enumerate(records): |
|
740 | for i, r in enumerate(records): | |
739 | if not isinstance(r, stack_data.RepeatedFrames) and self.skip_hidden: |
|
741 | if not isinstance(r, stack_data.RepeatedFrames) and self.skip_hidden: | |
740 | if r.frame.f_locals.get("__tracebackhide__", 0) and i != lastrecord: |
|
742 | if r.frame.f_locals.get("__tracebackhide__", 0) and i != lastrecord: | |
741 | skipped += 1 |
|
743 | skipped += 1 | |
742 | continue |
|
744 | continue | |
743 | if skipped: |
|
745 | if skipped: | |
744 | Colors = self.Colors # just a shorthand + quicker name lookup |
|
746 | Colors = self.Colors # just a shorthand + quicker name lookup | |
745 | ColorsNormal = Colors.Normal # used a lot |
|
747 | ColorsNormal = Colors.Normal # used a lot | |
746 | frames.append( |
|
748 | frames.append( | |
747 | " %s[... skipping hidden %s frame]%s\n" |
|
749 | " %s[... skipping hidden %s frame]%s\n" | |
748 | % (Colors.excName, skipped, ColorsNormal) |
|
750 | % (Colors.excName, skipped, ColorsNormal) | |
749 | ) |
|
751 | ) | |
750 | skipped = 0 |
|
752 | skipped = 0 | |
751 | frames.append(self.format_record(r)) |
|
753 | frames.append(self.format_record(r)) | |
752 | if skipped: |
|
754 | if skipped: | |
753 | Colors = self.Colors # just a shorthand + quicker name lookup |
|
755 | Colors = self.Colors # just a shorthand + quicker name lookup | |
754 | ColorsNormal = Colors.Normal # used a lot |
|
756 | ColorsNormal = Colors.Normal # used a lot | |
755 | frames.append( |
|
757 | frames.append( | |
756 | " %s[... skipping hidden %s frame]%s\n" |
|
758 | " %s[... skipping hidden %s frame]%s\n" | |
757 | % (Colors.excName, skipped, ColorsNormal) |
|
759 | % (Colors.excName, skipped, ColorsNormal) | |
758 | ) |
|
760 | ) | |
759 |
|
761 | |||
760 | formatted_exception = self.format_exception(etype, evalue) |
|
762 | formatted_exception = self.format_exception(etype, evalue) | |
761 | if records: |
|
763 | if records: | |
762 | frame_info = records[-1] |
|
764 | frame_info = records[-1] | |
763 | ipinst = get_ipython() |
|
765 | ipinst = get_ipython() | |
764 | if ipinst is not None: |
|
766 | if ipinst is not None: | |
765 | ipinst.hooks.synchronize_with_editor(frame_info.filename, frame_info.lineno, 0) |
|
767 | ipinst.hooks.synchronize_with_editor(frame_info.filename, frame_info.lineno, 0) | |
766 |
|
768 | |||
767 | return [[head] + frames + [''.join(formatted_exception[0])]] |
|
769 | return [[head] + frames + [''.join(formatted_exception[0])]] | |
768 |
|
770 | |||
769 | def get_records(self, etb, number_of_lines_of_context, tb_offset): |
|
771 | def get_records(self, etb, number_of_lines_of_context, tb_offset): | |
770 | context = number_of_lines_of_context - 1 |
|
772 | context = number_of_lines_of_context - 1 | |
771 | after = context // 2 |
|
773 | after = context // 2 | |
772 | before = context - after |
|
774 | before = context - after | |
773 | if self.has_colors: |
|
775 | if self.has_colors: | |
774 | style = get_style_by_name('default') |
|
776 | style = get_style_by_name('default') | |
775 | style = stack_data.style_with_executing_node(style, 'bg:#00005f') |
|
777 | style = stack_data.style_with_executing_node(style, 'bg:#00005f') | |
776 | formatter = Terminal256Formatter(style=style) |
|
778 | formatter = Terminal256Formatter(style=style) | |
777 | else: |
|
779 | else: | |
778 | formatter = None |
|
780 | formatter = None | |
779 | options = stack_data.Options( |
|
781 | options = stack_data.Options( | |
780 | before=before, |
|
782 | before=before, | |
781 | after=after, |
|
783 | after=after, | |
782 | pygments_formatter=formatter, |
|
784 | pygments_formatter=formatter, | |
783 | ) |
|
785 | ) | |
784 | return list(stack_data.FrameInfo.stack_data(etb, options=options))[tb_offset:] |
|
786 | return list(stack_data.FrameInfo.stack_data(etb, options=options))[tb_offset:] | |
785 |
|
787 | |||
786 | def structured_traceback(self, etype, evalue, etb, tb_offset=None, |
|
788 | def structured_traceback(self, etype, evalue, etb, tb_offset=None, | |
787 | number_of_lines_of_context=5): |
|
789 | number_of_lines_of_context=5): | |
788 | """Return a nice text document describing the traceback.""" |
|
790 | """Return a nice text document describing the traceback.""" | |
789 |
|
791 | |||
790 | formatted_exception = self.format_exception_as_a_whole(etype, evalue, etb, number_of_lines_of_context, |
|
792 | formatted_exception = self.format_exception_as_a_whole(etype, evalue, etb, number_of_lines_of_context, | |
791 | tb_offset) |
|
793 | tb_offset) | |
792 |
|
794 | |||
793 | colors = self.Colors # just a shorthand + quicker name lookup |
|
795 | colors = self.Colors # just a shorthand + quicker name lookup | |
794 | colorsnormal = colors.Normal # used a lot |
|
796 | colorsnormal = colors.Normal # used a lot | |
795 | head = '%s%s%s' % (colors.topline, '-' * min(75, get_terminal_size()[0]), colorsnormal) |
|
797 | head = '%s%s%s' % (colors.topline, '-' * min(75, get_terminal_size()[0]), colorsnormal) | |
796 | structured_traceback_parts = [head] |
|
798 | structured_traceback_parts = [head] | |
797 | chained_exceptions_tb_offset = 0 |
|
799 | chained_exceptions_tb_offset = 0 | |
798 | lines_of_context = 3 |
|
800 | lines_of_context = 3 | |
799 | formatted_exceptions = formatted_exception |
|
801 | formatted_exceptions = formatted_exception | |
800 | exception = self.get_parts_of_chained_exception(evalue) |
|
802 | exception = self.get_parts_of_chained_exception(evalue) | |
801 | if exception: |
|
803 | if exception: | |
802 | formatted_exceptions += self.prepare_chained_exception_message(evalue.__cause__) |
|
804 | formatted_exceptions += self.prepare_chained_exception_message(evalue.__cause__) | |
803 | etype, evalue, etb = exception |
|
805 | etype, evalue, etb = exception | |
804 | else: |
|
806 | else: | |
805 | evalue = None |
|
807 | evalue = None | |
806 | chained_exc_ids = set() |
|
808 | chained_exc_ids = set() | |
807 | while evalue: |
|
809 | while evalue: | |
808 | formatted_exceptions += self.format_exception_as_a_whole(etype, evalue, etb, lines_of_context, |
|
810 | formatted_exceptions += self.format_exception_as_a_whole(etype, evalue, etb, lines_of_context, | |
809 | chained_exceptions_tb_offset) |
|
811 | chained_exceptions_tb_offset) | |
810 | exception = self.get_parts_of_chained_exception(evalue) |
|
812 | exception = self.get_parts_of_chained_exception(evalue) | |
811 |
|
813 | |||
812 | if exception and not id(exception[1]) in chained_exc_ids: |
|
814 | if exception and not id(exception[1]) in chained_exc_ids: | |
813 | chained_exc_ids.add(id(exception[1])) # trace exception to avoid infinite 'cause' loop |
|
815 | chained_exc_ids.add(id(exception[1])) # trace exception to avoid infinite 'cause' loop | |
814 | formatted_exceptions += self.prepare_chained_exception_message(evalue.__cause__) |
|
816 | formatted_exceptions += self.prepare_chained_exception_message(evalue.__cause__) | |
815 | etype, evalue, etb = exception |
|
817 | etype, evalue, etb = exception | |
816 | else: |
|
818 | else: | |
817 | evalue = None |
|
819 | evalue = None | |
818 |
|
820 | |||
819 | # we want to see exceptions in a reversed order: |
|
821 | # we want to see exceptions in a reversed order: | |
820 | # the first exception should be on top |
|
822 | # the first exception should be on top | |
821 | for formatted_exception in reversed(formatted_exceptions): |
|
823 | for formatted_exception in reversed(formatted_exceptions): | |
822 | structured_traceback_parts += formatted_exception |
|
824 | structured_traceback_parts += formatted_exception | |
823 |
|
825 | |||
824 | return structured_traceback_parts |
|
826 | return structured_traceback_parts | |
825 |
|
827 | |||
826 | def debugger(self, force=False): |
|
828 | def debugger(self, force=False): | |
827 | """Call up the pdb debugger if desired, always clean up the tb |
|
829 | """Call up the pdb debugger if desired, always clean up the tb | |
828 | reference. |
|
830 | reference. | |
829 |
|
831 | |||
830 | Keywords: |
|
832 | Keywords: | |
831 |
|
833 | |||
832 | - force(False): by default, this routine checks the instance call_pdb |
|
834 | - force(False): by default, this routine checks the instance call_pdb | |
833 | flag and does not actually invoke the debugger if the flag is false. |
|
835 | flag and does not actually invoke the debugger if the flag is false. | |
834 | The 'force' option forces the debugger to activate even if the flag |
|
836 | The 'force' option forces the debugger to activate even if the flag | |
835 | is false. |
|
837 | is false. | |
836 |
|
838 | |||
837 | If the call_pdb flag is set, the pdb interactive debugger is |
|
839 | If the call_pdb flag is set, the pdb interactive debugger is | |
838 | invoked. In all cases, the self.tb reference to the current traceback |
|
840 | invoked. In all cases, the self.tb reference to the current traceback | |
839 | is deleted to prevent lingering references which hamper memory |
|
841 | is deleted to prevent lingering references which hamper memory | |
840 | management. |
|
842 | management. | |
841 |
|
843 | |||
842 | Note that each call to pdb() does an 'import readline', so if your app |
|
844 | Note that each call to pdb() does an 'import readline', so if your app | |
843 | requires a special setup for the readline completers, you'll have to |
|
845 | requires a special setup for the readline completers, you'll have to | |
844 | fix that by hand after invoking the exception handler.""" |
|
846 | fix that by hand after invoking the exception handler.""" | |
845 |
|
847 | |||
846 | if force or self.call_pdb: |
|
848 | if force or self.call_pdb: | |
847 | if self.pdb is None: |
|
849 | if self.pdb is None: | |
848 | self.pdb = self.debugger_cls() |
|
850 | self.pdb = self.debugger_cls() | |
849 | # the system displayhook may have changed, restore the original |
|
851 | # the system displayhook may have changed, restore the original | |
850 | # for pdb |
|
852 | # for pdb | |
851 | display_trap = DisplayTrap(hook=sys.__displayhook__) |
|
853 | display_trap = DisplayTrap(hook=sys.__displayhook__) | |
852 | with display_trap: |
|
854 | with display_trap: | |
853 | self.pdb.reset() |
|
855 | self.pdb.reset() | |
854 | # Find the right frame so we don't pop up inside ipython itself |
|
856 | # Find the right frame so we don't pop up inside ipython itself | |
855 | if hasattr(self, 'tb') and self.tb is not None: |
|
857 | if hasattr(self, 'tb') and self.tb is not None: | |
856 | etb = self.tb |
|
858 | etb = self.tb | |
857 | else: |
|
859 | else: | |
858 | etb = self.tb = sys.last_traceback |
|
860 | etb = self.tb = sys.last_traceback | |
859 | while self.tb is not None and self.tb.tb_next is not None: |
|
861 | while self.tb is not None and self.tb.tb_next is not None: | |
860 | self.tb = self.tb.tb_next |
|
862 | self.tb = self.tb.tb_next | |
861 | if etb and etb.tb_next: |
|
863 | if etb and etb.tb_next: | |
862 | etb = etb.tb_next |
|
864 | etb = etb.tb_next | |
863 | self.pdb.botframe = etb.tb_frame |
|
865 | self.pdb.botframe = etb.tb_frame | |
864 | self.pdb.interaction(None, etb) |
|
866 | self.pdb.interaction(None, etb) | |
865 |
|
867 | |||
866 | if hasattr(self, 'tb'): |
|
868 | if hasattr(self, 'tb'): | |
867 | del self.tb |
|
869 | del self.tb | |
868 |
|
870 | |||
869 | def handler(self, info=None): |
|
871 | def handler(self, info=None): | |
870 | (etype, evalue, etb) = info or sys.exc_info() |
|
872 | (etype, evalue, etb) = info or sys.exc_info() | |
871 | self.tb = etb |
|
873 | self.tb = etb | |
872 | ostream = self.ostream |
|
874 | ostream = self.ostream | |
873 | ostream.flush() |
|
875 | ostream.flush() | |
874 | ostream.write(self.text(etype, evalue, etb)) |
|
876 | ostream.write(self.text(etype, evalue, etb)) | |
875 | ostream.write('\n') |
|
877 | ostream.write('\n') | |
876 | ostream.flush() |
|
878 | ostream.flush() | |
877 |
|
879 | |||
878 | # Changed so an instance can just be called as VerboseTB_inst() and print |
|
880 | # Changed so an instance can just be called as VerboseTB_inst() and print | |
879 | # out the right info on its own. |
|
881 | # out the right info on its own. | |
880 | def __call__(self, etype=None, evalue=None, etb=None): |
|
882 | def __call__(self, etype=None, evalue=None, etb=None): | |
881 | """This hook can replace sys.excepthook (for Python 2.1 or higher).""" |
|
883 | """This hook can replace sys.excepthook (for Python 2.1 or higher).""" | |
882 | if etb is None: |
|
884 | if etb is None: | |
883 | self.handler() |
|
885 | self.handler() | |
884 | else: |
|
886 | else: | |
885 | self.handler((etype, evalue, etb)) |
|
887 | self.handler((etype, evalue, etb)) | |
886 | try: |
|
888 | try: | |
887 | self.debugger() |
|
889 | self.debugger() | |
888 | except KeyboardInterrupt: |
|
890 | except KeyboardInterrupt: | |
889 | print("\nKeyboardInterrupt") |
|
891 | print("\nKeyboardInterrupt") | |
890 |
|
892 | |||
891 |
|
893 | |||
892 | #---------------------------------------------------------------------------- |
|
894 | #---------------------------------------------------------------------------- | |
893 | class FormattedTB(VerboseTB, ListTB): |
|
895 | class FormattedTB(VerboseTB, ListTB): | |
894 | """Subclass ListTB but allow calling with a traceback. |
|
896 | """Subclass ListTB but allow calling with a traceback. | |
895 |
|
897 | |||
896 | It can thus be used as a sys.excepthook for Python > 2.1. |
|
898 | It can thus be used as a sys.excepthook for Python > 2.1. | |
897 |
|
899 | |||
898 | Also adds 'Context' and 'Verbose' modes, not available in ListTB. |
|
900 | Also adds 'Context' and 'Verbose' modes, not available in ListTB. | |
899 |
|
901 | |||
900 | Allows a tb_offset to be specified. This is useful for situations where |
|
902 | Allows a tb_offset to be specified. This is useful for situations where | |
901 | one needs to remove a number of topmost frames from the traceback (such as |
|
903 | one needs to remove a number of topmost frames from the traceback (such as | |
902 | occurs with python programs that themselves execute other python code, |
|
904 | occurs with python programs that themselves execute other python code, | |
903 | like Python shells). """ |
|
905 | like Python shells). """ | |
904 |
|
906 | |||
905 | def __init__(self, mode='Plain', color_scheme='Linux', call_pdb=False, |
|
907 | def __init__(self, mode='Plain', color_scheme='Linux', call_pdb=False, | |
906 | ostream=None, |
|
908 | ostream=None, | |
907 | tb_offset=0, long_header=False, include_vars=False, |
|
909 | tb_offset=0, long_header=False, include_vars=False, | |
908 | check_cache=None, debugger_cls=None, |
|
910 | check_cache=None, debugger_cls=None, | |
909 | parent=None, config=None): |
|
911 | parent=None, config=None): | |
910 |
|
912 | |||
911 | # NEVER change the order of this list. Put new modes at the end: |
|
913 | # NEVER change the order of this list. Put new modes at the end: | |
912 | self.valid_modes = ['Plain', 'Context', 'Verbose', 'Minimal'] |
|
914 | self.valid_modes = ['Plain', 'Context', 'Verbose', 'Minimal'] | |
913 | self.verbose_modes = self.valid_modes[1:3] |
|
915 | self.verbose_modes = self.valid_modes[1:3] | |
914 |
|
916 | |||
915 | VerboseTB.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, |
|
917 | VerboseTB.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, | |
916 | ostream=ostream, tb_offset=tb_offset, |
|
918 | ostream=ostream, tb_offset=tb_offset, | |
917 | long_header=long_header, include_vars=include_vars, |
|
919 | long_header=long_header, include_vars=include_vars, | |
918 | check_cache=check_cache, debugger_cls=debugger_cls, |
|
920 | check_cache=check_cache, debugger_cls=debugger_cls, | |
919 | parent=parent, config=config) |
|
921 | parent=parent, config=config) | |
920 |
|
922 | |||
921 | # Different types of tracebacks are joined with different separators to |
|
923 | # Different types of tracebacks are joined with different separators to | |
922 | # form a single string. They are taken from this dict |
|
924 | # form a single string. They are taken from this dict | |
923 | self._join_chars = dict(Plain='', Context='\n', Verbose='\n', |
|
925 | self._join_chars = dict(Plain='', Context='\n', Verbose='\n', | |
924 | Minimal='') |
|
926 | Minimal='') | |
925 | # set_mode also sets the tb_join_char attribute |
|
927 | # set_mode also sets the tb_join_char attribute | |
926 | self.set_mode(mode) |
|
928 | self.set_mode(mode) | |
927 |
|
929 | |||
928 | def structured_traceback(self, etype, value, tb, tb_offset=None, number_of_lines_of_context=5): |
|
930 | def structured_traceback(self, etype, value, tb, tb_offset=None, number_of_lines_of_context=5): | |
929 | tb_offset = self.tb_offset if tb_offset is None else tb_offset |
|
931 | tb_offset = self.tb_offset if tb_offset is None else tb_offset | |
930 | mode = self.mode |
|
932 | mode = self.mode | |
931 | if mode in self.verbose_modes: |
|
933 | if mode in self.verbose_modes: | |
932 | # Verbose modes need a full traceback |
|
934 | # Verbose modes need a full traceback | |
933 | return VerboseTB.structured_traceback( |
|
935 | return VerboseTB.structured_traceback( | |
934 | self, etype, value, tb, tb_offset, number_of_lines_of_context |
|
936 | self, etype, value, tb, tb_offset, number_of_lines_of_context | |
935 | ) |
|
937 | ) | |
936 | elif mode == 'Minimal': |
|
938 | elif mode == 'Minimal': | |
937 | return ListTB.get_exception_only(self, etype, value) |
|
939 | return ListTB.get_exception_only(self, etype, value) | |
938 | else: |
|
940 | else: | |
939 | # We must check the source cache because otherwise we can print |
|
941 | # We must check the source cache because otherwise we can print | |
940 | # out-of-date source code. |
|
942 | # out-of-date source code. | |
941 | self.check_cache() |
|
943 | self.check_cache() | |
942 | # Now we can extract and format the exception |
|
944 | # Now we can extract and format the exception | |
943 | return ListTB.structured_traceback( |
|
945 | return ListTB.structured_traceback( | |
944 | self, etype, value, tb, tb_offset, number_of_lines_of_context |
|
946 | self, etype, value, tb, tb_offset, number_of_lines_of_context | |
945 | ) |
|
947 | ) | |
946 |
|
948 | |||
947 | def stb2text(self, stb): |
|
949 | def stb2text(self, stb): | |
948 | """Convert a structured traceback (a list) to a string.""" |
|
950 | """Convert a structured traceback (a list) to a string.""" | |
949 | return self.tb_join_char.join(stb) |
|
951 | return self.tb_join_char.join(stb) | |
950 |
|
952 | |||
951 |
|
953 | |||
952 | def set_mode(self, mode=None): |
|
954 | def set_mode(self, mode=None): | |
953 | """Switch to the desired mode. |
|
955 | """Switch to the desired mode. | |
954 |
|
956 | |||
955 | If mode is not specified, cycles through the available modes.""" |
|
957 | If mode is not specified, cycles through the available modes.""" | |
956 |
|
958 | |||
957 | if not mode: |
|
959 | if not mode: | |
958 | new_idx = (self.valid_modes.index(self.mode) + 1 ) % \ |
|
960 | new_idx = (self.valid_modes.index(self.mode) + 1 ) % \ | |
959 | len(self.valid_modes) |
|
961 | len(self.valid_modes) | |
960 | self.mode = self.valid_modes[new_idx] |
|
962 | self.mode = self.valid_modes[new_idx] | |
961 | elif mode not in self.valid_modes: |
|
963 | elif mode not in self.valid_modes: | |
962 | raise ValueError('Unrecognized mode in FormattedTB: <' + mode + '>\n' |
|
964 | raise ValueError('Unrecognized mode in FormattedTB: <' + mode + '>\n' | |
963 | 'Valid modes: ' + str(self.valid_modes)) |
|
965 | 'Valid modes: ' + str(self.valid_modes)) | |
964 | else: |
|
966 | else: | |
965 | self.mode = mode |
|
967 | self.mode = mode | |
966 | # include variable details only in 'Verbose' mode |
|
968 | # include variable details only in 'Verbose' mode | |
967 | self.include_vars = (self.mode == self.valid_modes[2]) |
|
969 | self.include_vars = (self.mode == self.valid_modes[2]) | |
968 | # Set the join character for generating text tracebacks |
|
970 | # Set the join character for generating text tracebacks | |
969 | self.tb_join_char = self._join_chars[self.mode] |
|
971 | self.tb_join_char = self._join_chars[self.mode] | |
970 |
|
972 | |||
971 | # some convenient shortcuts |
|
973 | # some convenient shortcuts | |
972 | def plain(self): |
|
974 | def plain(self): | |
973 | self.set_mode(self.valid_modes[0]) |
|
975 | self.set_mode(self.valid_modes[0]) | |
974 |
|
976 | |||
975 | def context(self): |
|
977 | def context(self): | |
976 | self.set_mode(self.valid_modes[1]) |
|
978 | self.set_mode(self.valid_modes[1]) | |
977 |
|
979 | |||
978 | def verbose(self): |
|
980 | def verbose(self): | |
979 | self.set_mode(self.valid_modes[2]) |
|
981 | self.set_mode(self.valid_modes[2]) | |
980 |
|
982 | |||
981 | def minimal(self): |
|
983 | def minimal(self): | |
982 | self.set_mode(self.valid_modes[3]) |
|
984 | self.set_mode(self.valid_modes[3]) | |
983 |
|
985 | |||
984 |
|
986 | |||
985 | #---------------------------------------------------------------------------- |
|
987 | #---------------------------------------------------------------------------- | |
986 | class AutoFormattedTB(FormattedTB): |
|
988 | class AutoFormattedTB(FormattedTB): | |
987 | """A traceback printer which can be called on the fly. |
|
989 | """A traceback printer which can be called on the fly. | |
988 |
|
990 | |||
989 | It will find out about exceptions by itself. |
|
991 | It will find out about exceptions by itself. | |
990 |
|
992 | |||
991 | A brief example:: |
|
993 | A brief example:: | |
992 |
|
994 | |||
993 | AutoTB = AutoFormattedTB(mode = 'Verbose',color_scheme='Linux') |
|
995 | AutoTB = AutoFormattedTB(mode = 'Verbose',color_scheme='Linux') | |
994 | try: |
|
996 | try: | |
995 | ... |
|
997 | ... | |
996 | except: |
|
998 | except: | |
997 | AutoTB() # or AutoTB(out=logfile) where logfile is an open file object |
|
999 | AutoTB() # or AutoTB(out=logfile) where logfile is an open file object | |
998 | """ |
|
1000 | """ | |
999 |
|
1001 | |||
1000 | def __call__(self, etype=None, evalue=None, etb=None, |
|
1002 | def __call__(self, etype=None, evalue=None, etb=None, | |
1001 | out=None, tb_offset=None): |
|
1003 | out=None, tb_offset=None): | |
1002 | """Print out a formatted exception traceback. |
|
1004 | """Print out a formatted exception traceback. | |
1003 |
|
1005 | |||
1004 | Optional arguments: |
|
1006 | Optional arguments: | |
1005 | - out: an open file-like object to direct output to. |
|
1007 | - out: an open file-like object to direct output to. | |
1006 |
|
1008 | |||
1007 | - tb_offset: the number of frames to skip over in the stack, on a |
|
1009 | - tb_offset: the number of frames to skip over in the stack, on a | |
1008 | per-call basis (this overrides temporarily the instance's tb_offset |
|
1010 | per-call basis (this overrides temporarily the instance's tb_offset | |
1009 | given at initialization time.""" |
|
1011 | given at initialization time.""" | |
1010 |
|
1012 | |||
1011 | if out is None: |
|
1013 | if out is None: | |
1012 | out = self.ostream |
|
1014 | out = self.ostream | |
1013 | out.flush() |
|
1015 | out.flush() | |
1014 | out.write(self.text(etype, evalue, etb, tb_offset)) |
|
1016 | out.write(self.text(etype, evalue, etb, tb_offset)) | |
1015 | out.write('\n') |
|
1017 | out.write('\n') | |
1016 | out.flush() |
|
1018 | out.flush() | |
1017 | # FIXME: we should remove the auto pdb behavior from here and leave |
|
1019 | # FIXME: we should remove the auto pdb behavior from here and leave | |
1018 | # that to the clients. |
|
1020 | # that to the clients. | |
1019 | try: |
|
1021 | try: | |
1020 | self.debugger() |
|
1022 | self.debugger() | |
1021 | except KeyboardInterrupt: |
|
1023 | except KeyboardInterrupt: | |
1022 | print("\nKeyboardInterrupt") |
|
1024 | print("\nKeyboardInterrupt") | |
1023 |
|
1025 | |||
1024 | def structured_traceback(self, etype=None, value=None, tb=None, |
|
1026 | def structured_traceback(self, etype=None, value=None, tb=None, | |
1025 | tb_offset=None, number_of_lines_of_context=5): |
|
1027 | tb_offset=None, number_of_lines_of_context=5): | |
1026 | if etype is None: |
|
1028 | if etype is None: | |
1027 | etype, value, tb = sys.exc_info() |
|
1029 | etype, value, tb = sys.exc_info() | |
1028 | if isinstance(tb, tuple): |
|
1030 | if isinstance(tb, tuple): | |
1029 | # tb is a tuple if this is a chained exception. |
|
1031 | # tb is a tuple if this is a chained exception. | |
1030 | self.tb = tb[0] |
|
1032 | self.tb = tb[0] | |
1031 | else: |
|
1033 | else: | |
1032 | self.tb = tb |
|
1034 | self.tb = tb | |
1033 | return FormattedTB.structured_traceback( |
|
1035 | return FormattedTB.structured_traceback( | |
1034 | self, etype, value, tb, tb_offset, number_of_lines_of_context) |
|
1036 | self, etype, value, tb, tb_offset, number_of_lines_of_context) | |
1035 |
|
1037 | |||
1036 |
|
1038 | |||
1037 | #--------------------------------------------------------------------------- |
|
1039 | #--------------------------------------------------------------------------- | |
1038 |
|
1040 | |||
1039 | # A simple class to preserve Nathan's original functionality. |
|
1041 | # A simple class to preserve Nathan's original functionality. | |
1040 | class ColorTB(FormattedTB): |
|
1042 | class ColorTB(FormattedTB): | |
1041 | """Shorthand to initialize a FormattedTB in Linux colors mode.""" |
|
1043 | """Shorthand to initialize a FormattedTB in Linux colors mode.""" | |
1042 |
|
1044 | |||
1043 | def __init__(self, color_scheme='Linux', call_pdb=0, **kwargs): |
|
1045 | def __init__(self, color_scheme='Linux', call_pdb=0, **kwargs): | |
1044 | FormattedTB.__init__(self, color_scheme=color_scheme, |
|
1046 | FormattedTB.__init__(self, color_scheme=color_scheme, | |
1045 | call_pdb=call_pdb, **kwargs) |
|
1047 | call_pdb=call_pdb, **kwargs) | |
1046 |
|
1048 | |||
1047 |
|
1049 | |||
1048 | class SyntaxTB(ListTB): |
|
1050 | class SyntaxTB(ListTB): | |
1049 | """Extension which holds some state: the last exception value""" |
|
1051 | """Extension which holds some state: the last exception value""" | |
1050 |
|
1052 | |||
1051 | def __init__(self, color_scheme='NoColor', parent=None, config=None): |
|
1053 | def __init__(self, color_scheme='NoColor', parent=None, config=None): | |
1052 | ListTB.__init__(self, color_scheme, parent=parent, config=config) |
|
1054 | ListTB.__init__(self, color_scheme, parent=parent, config=config) | |
1053 | self.last_syntax_error = None |
|
1055 | self.last_syntax_error = None | |
1054 |
|
1056 | |||
1055 | def __call__(self, etype, value, elist): |
|
1057 | def __call__(self, etype, value, elist): | |
1056 | self.last_syntax_error = value |
|
1058 | self.last_syntax_error = value | |
1057 |
|
1059 | |||
1058 | ListTB.__call__(self, etype, value, elist) |
|
1060 | ListTB.__call__(self, etype, value, elist) | |
1059 |
|
1061 | |||
1060 | def structured_traceback(self, etype, value, elist, tb_offset=None, |
|
1062 | def structured_traceback(self, etype, value, elist, tb_offset=None, | |
1061 | context=5): |
|
1063 | context=5): | |
1062 | # If the source file has been edited, the line in the syntax error can |
|
1064 | # If the source file has been edited, the line in the syntax error can | |
1063 | # be wrong (retrieved from an outdated cache). This replaces it with |
|
1065 | # be wrong (retrieved from an outdated cache). This replaces it with | |
1064 | # the current value. |
|
1066 | # the current value. | |
1065 | if isinstance(value, SyntaxError) \ |
|
1067 | if isinstance(value, SyntaxError) \ | |
1066 | and isinstance(value.filename, str) \ |
|
1068 | and isinstance(value.filename, str) \ | |
1067 | and isinstance(value.lineno, int): |
|
1069 | and isinstance(value.lineno, int): | |
1068 | linecache.checkcache(value.filename) |
|
1070 | linecache.checkcache(value.filename) | |
1069 | newtext = linecache.getline(value.filename, value.lineno) |
|
1071 | newtext = linecache.getline(value.filename, value.lineno) | |
1070 | if newtext: |
|
1072 | if newtext: | |
1071 | value.text = newtext |
|
1073 | value.text = newtext | |
1072 | self.last_syntax_error = value |
|
1074 | self.last_syntax_error = value | |
1073 | return super(SyntaxTB, self).structured_traceback(etype, value, elist, |
|
1075 | return super(SyntaxTB, self).structured_traceback(etype, value, elist, | |
1074 | tb_offset=tb_offset, context=context) |
|
1076 | tb_offset=tb_offset, context=context) | |
1075 |
|
1077 | |||
1076 | def clear_err_state(self): |
|
1078 | def clear_err_state(self): | |
1077 | """Return the current error state and clear it""" |
|
1079 | """Return the current error state and clear it""" | |
1078 | e = self.last_syntax_error |
|
1080 | e = self.last_syntax_error | |
1079 | self.last_syntax_error = None |
|
1081 | self.last_syntax_error = None | |
1080 | return e |
|
1082 | return e | |
1081 |
|
1083 | |||
1082 | def stb2text(self, stb): |
|
1084 | def stb2text(self, stb): | |
1083 | """Convert a structured traceback (a list) to a string.""" |
|
1085 | """Convert a structured traceback (a list) to a string.""" | |
1084 | return ''.join(stb) |
|
1086 | return ''.join(stb) | |
1085 |
|
1087 | |||
1086 |
|
1088 | |||
1087 | # some internal-use functions |
|
1089 | # some internal-use functions | |
1088 | def text_repr(value): |
|
1090 | def text_repr(value): | |
1089 | """Hopefully pretty robust repr equivalent.""" |
|
1091 | """Hopefully pretty robust repr equivalent.""" | |
1090 | # this is pretty horrible but should always return *something* |
|
1092 | # this is pretty horrible but should always return *something* | |
1091 | try: |
|
1093 | try: | |
1092 | return pydoc.text.repr(value) |
|
1094 | return pydoc.text.repr(value) | |
1093 | except KeyboardInterrupt: |
|
1095 | except KeyboardInterrupt: | |
1094 | raise |
|
1096 | raise | |
1095 | except: |
|
1097 | except: | |
1096 | try: |
|
1098 | try: | |
1097 | return repr(value) |
|
1099 | return repr(value) | |
1098 | except KeyboardInterrupt: |
|
1100 | except KeyboardInterrupt: | |
1099 | raise |
|
1101 | raise | |
1100 | except: |
|
1102 | except: | |
1101 | try: |
|
1103 | try: | |
1102 | # all still in an except block so we catch |
|
1104 | # all still in an except block so we catch | |
1103 | # getattr raising |
|
1105 | # getattr raising | |
1104 | name = getattr(value, '__name__', None) |
|
1106 | name = getattr(value, '__name__', None) | |
1105 | if name: |
|
1107 | if name: | |
1106 | # ick, recursion |
|
1108 | # ick, recursion | |
1107 | return text_repr(name) |
|
1109 | return text_repr(name) | |
1108 | klass = getattr(value, '__class__', None) |
|
1110 | klass = getattr(value, '__class__', None) | |
1109 | if klass: |
|
1111 | if klass: | |
1110 | return '%s instance' % text_repr(klass) |
|
1112 | return '%s instance' % text_repr(klass) | |
1111 | except KeyboardInterrupt: |
|
1113 | except KeyboardInterrupt: | |
1112 | raise |
|
1114 | raise | |
1113 | except: |
|
1115 | except: | |
1114 | return 'UNRECOVERABLE REPR FAILURE' |
|
1116 | return 'UNRECOVERABLE REPR FAILURE' | |
1115 |
|
1117 | |||
1116 |
|
1118 | |||
1117 | def eqrepr(value, repr=text_repr): |
|
1119 | def eqrepr(value, repr=text_repr): | |
1118 | return '=%s' % repr(value) |
|
1120 | return '=%s' % repr(value) | |
1119 |
|
1121 | |||
1120 |
|
1122 | |||
1121 | def nullrepr(value, repr=text_repr): |
|
1123 | def nullrepr(value, repr=text_repr): | |
1122 | return '' |
|
1124 | return '' |
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