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@@ -1,946 +1,949 b'' | |||
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1 | 1 | # -*- coding: utf-8 -*- |
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2 | 2 | """ |
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3 | 3 | Pdb debugger class. |
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4 | 4 | |
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5 | 5 | Modified from the standard pdb.Pdb class to avoid including readline, so that |
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6 | 6 | the command line completion of other programs which include this isn't |
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7 | 7 | damaged. |
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8 | 8 | |
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9 | 9 | In the future, this class will be expanded with improvements over the standard |
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10 | 10 | pdb. |
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11 | 11 | |
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12 | 12 | The code in this file is mainly lifted out of cmd.py in Python 2.2, with minor |
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13 | 13 | changes. Licensing should therefore be under the standard Python terms. For |
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14 | 14 | details on the PSF (Python Software Foundation) standard license, see: |
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15 | 15 | |
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16 | 16 | https://docs.python.org/2/license.html |
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17 | 17 | """ |
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18 | 18 | |
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19 | 19 | #***************************************************************************** |
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20 | 20 | # |
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21 | 21 | # This file is licensed under the PSF license. |
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22 | 22 | # |
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23 | 23 | # Copyright (C) 2001 Python Software Foundation, www.python.org |
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24 | 24 | # Copyright (C) 2005-2006 Fernando Perez. <fperez@colorado.edu> |
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25 | 25 | # |
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26 | 26 | # |
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27 | 27 | #***************************************************************************** |
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28 | 28 | |
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29 | 29 | import bdb |
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30 | 30 | import functools |
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31 | 31 | import inspect |
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32 | 32 | import linecache |
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33 | 33 | import sys |
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34 | 34 | import warnings |
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35 | 35 | import re |
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36 | 36 | import os |
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37 | 37 | |
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38 | 38 | from IPython import get_ipython |
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39 | 39 | from IPython.utils import PyColorize |
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40 | 40 | from IPython.utils import coloransi, py3compat |
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41 | 41 | from IPython.core.excolors import exception_colors |
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42 | 42 | from IPython.testing.skipdoctest import skip_doctest |
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43 | 43 | |
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44 | 44 | |
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45 | 45 | prompt = 'ipdb> ' |
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46 | 46 | |
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47 | 47 | # We have to check this directly from sys.argv, config struct not yet available |
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48 | 48 | from pdb import Pdb as OldPdb |
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49 | 49 | |
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50 | 50 | # Allow the set_trace code to operate outside of an ipython instance, even if |
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51 | 51 | # it does so with some limitations. The rest of this support is implemented in |
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52 | 52 | # the Tracer constructor. |
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53 | 53 | |
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54 | 54 | |
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55 | 55 | def make_arrow(pad): |
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56 | 56 | """generate the leading arrow in front of traceback or debugger""" |
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57 | 57 | if pad >= 2: |
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58 | 58 | return '-'*(pad-2) + '> ' |
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59 | 59 | elif pad == 1: |
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60 | 60 | return '>' |
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61 | 61 | return '' |
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62 | 62 | |
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63 | 63 | |
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64 | 64 | def BdbQuit_excepthook(et, ev, tb, excepthook=None): |
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65 | 65 | """Exception hook which handles `BdbQuit` exceptions. |
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66 | 66 | |
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67 | 67 | All other exceptions are processed using the `excepthook` |
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68 | 68 | parameter. |
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69 | 69 | """ |
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70 | 70 | warnings.warn("`BdbQuit_excepthook` is deprecated since version 5.1", |
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71 | 71 | DeprecationWarning, stacklevel=2) |
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72 | 72 | if et == bdb.BdbQuit: |
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73 | 73 | print('Exiting Debugger.') |
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74 | 74 | elif excepthook is not None: |
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75 | 75 | excepthook(et, ev, tb) |
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76 | 76 | else: |
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77 | 77 | # Backwards compatibility. Raise deprecation warning? |
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78 | 78 | BdbQuit_excepthook.excepthook_ori(et, ev, tb) |
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79 | 79 | |
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80 | 80 | |
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81 | 81 | def BdbQuit_IPython_excepthook(self, et, ev, tb, tb_offset=None): |
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82 | 82 | warnings.warn( |
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83 | 83 | "`BdbQuit_IPython_excepthook` is deprecated since version 5.1", |
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84 | 84 | DeprecationWarning, stacklevel=2) |
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85 | 85 | print('Exiting Debugger.') |
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86 | 86 | |
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87 | 87 | |
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88 | 88 | class Tracer(object): |
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89 | 89 | """ |
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90 | 90 | DEPRECATED |
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91 | 91 | |
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92 | 92 | Class for local debugging, similar to pdb.set_trace. |
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93 | 93 | |
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94 | 94 | Instances of this class, when called, behave like pdb.set_trace, but |
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95 | 95 | providing IPython's enhanced capabilities. |
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96 | 96 | |
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97 | 97 | This is implemented as a class which must be initialized in your own code |
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98 | 98 | and not as a standalone function because we need to detect at runtime |
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99 | 99 | whether IPython is already active or not. That detection is done in the |
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100 | 100 | constructor, ensuring that this code plays nicely with a running IPython, |
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101 | 101 | while functioning acceptably (though with limitations) if outside of it. |
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102 | 102 | """ |
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103 | 103 | |
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104 | 104 | @skip_doctest |
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105 | 105 | def __init__(self, colors=None): |
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106 | 106 | """ |
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107 | 107 | DEPRECATED |
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108 | 108 | |
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109 | 109 | Create a local debugger instance. |
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110 | 110 | |
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111 | 111 | Parameters |
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112 | 112 | ---------- |
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113 | 113 | colors : str, optional |
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114 | 114 | The name of the color scheme to use, it must be one of IPython's |
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115 | 115 | valid color schemes. If not given, the function will default to |
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116 | 116 | the current IPython scheme when running inside IPython, and to |
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117 | 117 | 'NoColor' otherwise. |
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118 | 118 | |
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119 | 119 | Examples |
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120 | 120 | -------- |
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121 | 121 | :: |
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122 | 122 | |
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123 | 123 | from IPython.core.debugger import Tracer; debug_here = Tracer() |
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124 | 124 | |
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125 | 125 | Later in your code:: |
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126 | 126 | |
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127 | 127 | debug_here() # -> will open up the debugger at that point. |
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128 | 128 | |
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129 | 129 | Once the debugger activates, you can use all of its regular commands to |
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130 | 130 | step through code, set breakpoints, etc. See the pdb documentation |
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131 | 131 | from the Python standard library for usage details. |
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132 | 132 | """ |
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133 | 133 | warnings.warn("`Tracer` is deprecated since version 5.1, directly use " |
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134 | 134 | "`IPython.core.debugger.Pdb.set_trace()`", |
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135 | 135 | DeprecationWarning, stacklevel=2) |
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136 | 136 | |
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137 | 137 | ip = get_ipython() |
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138 | 138 | if ip is None: |
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139 | 139 | # Outside of ipython, we set our own exception hook manually |
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140 | 140 | sys.excepthook = functools.partial(BdbQuit_excepthook, |
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141 | 141 | excepthook=sys.excepthook) |
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142 | 142 | def_colors = 'NoColor' |
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143 | 143 | else: |
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144 | 144 | # In ipython, we use its custom exception handler mechanism |
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145 | 145 | def_colors = ip.colors |
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146 | 146 | ip.set_custom_exc((bdb.BdbQuit,), BdbQuit_IPython_excepthook) |
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147 | 147 | |
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148 | 148 | if colors is None: |
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149 | 149 | colors = def_colors |
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150 | 150 | |
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151 | 151 | # The stdlib debugger internally uses a modified repr from the `repr` |
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152 | 152 | # module, that limits the length of printed strings to a hardcoded |
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153 | 153 | # limit of 30 characters. That much trimming is too aggressive, let's |
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154 | 154 | # at least raise that limit to 80 chars, which should be enough for |
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155 | 155 | # most interactive uses. |
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156 | 156 | try: |
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157 | 157 | from reprlib import aRepr |
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158 | 158 | aRepr.maxstring = 80 |
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159 | 159 | except: |
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160 | 160 | # This is only a user-facing convenience, so any error we encounter |
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161 | 161 | # here can be warned about but can be otherwise ignored. These |
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162 | 162 | # printouts will tell us about problems if this API changes |
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163 | 163 | import traceback |
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164 | 164 | traceback.print_exc() |
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165 | 165 | |
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166 | 166 | self.debugger = Pdb(colors) |
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167 | 167 | |
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168 | 168 | def __call__(self): |
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169 | 169 | """Starts an interactive debugger at the point where called. |
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170 | 170 | |
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171 | 171 | This is similar to the pdb.set_trace() function from the std lib, but |
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172 | 172 | using IPython's enhanced debugger.""" |
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173 | 173 | |
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174 | 174 | self.debugger.set_trace(sys._getframe().f_back) |
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175 | 175 | |
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176 | 176 | |
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177 | 177 | RGX_EXTRA_INDENT = re.compile(r'(?<=\n)\s+') |
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178 | 178 | |
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179 | 179 | |
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180 | 180 | def strip_indentation(multiline_string): |
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181 | 181 | return RGX_EXTRA_INDENT.sub('', multiline_string) |
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182 | 182 | |
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183 | 183 | |
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184 | 184 | def decorate_fn_with_doc(new_fn, old_fn, additional_text=""): |
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185 | 185 | """Make new_fn have old_fn's doc string. This is particularly useful |
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186 | 186 | for the ``do_...`` commands that hook into the help system. |
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187 | 187 | Adapted from from a comp.lang.python posting |
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188 | 188 | by Duncan Booth.""" |
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189 | 189 | def wrapper(*args, **kw): |
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190 | 190 | return new_fn(*args, **kw) |
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191 | 191 | if old_fn.__doc__: |
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192 | 192 | wrapper.__doc__ = strip_indentation(old_fn.__doc__) + additional_text |
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193 | 193 | return wrapper |
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194 | 194 | |
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195 | 195 | |
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196 | 196 | class Pdb(OldPdb): |
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197 | 197 | """Modified Pdb class, does not load readline. |
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198 | 198 | |
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199 | 199 | for a standalone version that uses prompt_toolkit, see |
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200 | 200 | `IPython.terminal.debugger.TerminalPdb` and |
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201 | 201 | `IPython.terminal.debugger.set_trace()` |
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202 | 202 | |
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203 | 203 | |
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204 | 204 | This debugger can hide and skip frames that are tagged according to some predicates. |
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205 | 205 | See the `skip_predicates` commands. |
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206 | 206 | |
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207 | 207 | """ |
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208 | 208 | |
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209 | 209 | default_predicates = {"tbhide": True, "readonly": False, "ipython_internal": True} |
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210 | 210 | |
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211 | 211 | def __init__(self, color_scheme=None, completekey=None, |
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212 | 212 | stdin=None, stdout=None, context=5, **kwargs): |
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213 | 213 | """Create a new IPython debugger. |
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214 | 214 | |
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215 | 215 | Parameters |
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216 | 216 | ---------- |
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217 | 217 | color_scheme : default None |
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218 | 218 | Deprecated, do not use. |
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219 | 219 | completekey : default None |
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220 | 220 | Passed to pdb.Pdb. |
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221 | 221 | stdin : default None |
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222 | 222 | Passed to pdb.Pdb. |
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223 | 223 | stdout : default None |
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224 | 224 | Passed to pdb.Pdb. |
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225 | 225 | context : int |
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226 | 226 | Number of lines of source code context to show when |
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227 | 227 | displaying stacktrace information. |
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228 | 228 | **kwargs |
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229 | 229 | Passed to pdb.Pdb. |
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230 | 230 | |
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231 | 231 | Notes |
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232 | 232 | ----- |
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233 | 233 | The possibilities are python version dependent, see the python |
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234 | 234 | docs for more info. |
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235 | 235 | """ |
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236 | 236 | |
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237 | 237 | # Parent constructor: |
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238 | 238 | try: |
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239 | 239 | self.context = int(context) |
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240 | 240 | if self.context <= 0: |
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241 | 241 | raise ValueError("Context must be a positive integer") |
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242 | 242 | except (TypeError, ValueError) as e: |
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243 | 243 | raise ValueError("Context must be a positive integer") from e |
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244 | 244 | |
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245 | 245 | # `kwargs` ensures full compatibility with stdlib's `pdb.Pdb`. |
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246 | 246 | OldPdb.__init__(self, completekey, stdin, stdout, **kwargs) |
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247 | 247 | |
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248 | 248 | # IPython changes... |
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249 | 249 | self.shell = get_ipython() |
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250 | 250 | |
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251 | 251 | if self.shell is None: |
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252 | 252 | save_main = sys.modules['__main__'] |
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253 | 253 | # No IPython instance running, we must create one |
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254 | 254 | from IPython.terminal.interactiveshell import \ |
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255 | 255 | TerminalInteractiveShell |
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256 | 256 | self.shell = TerminalInteractiveShell.instance() |
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257 | 257 | # needed by any code which calls __import__("__main__") after |
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258 | 258 | # the debugger was entered. See also #9941. |
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259 | 259 | sys.modules["__main__"] = save_main |
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260 | 260 | |
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261 | 261 | if color_scheme is not None: |
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262 | 262 | warnings.warn( |
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263 | 263 | "The `color_scheme` argument is deprecated since version 5.1", |
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264 | 264 | DeprecationWarning, stacklevel=2) |
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265 | 265 | else: |
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266 | 266 | color_scheme = self.shell.colors |
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267 | 267 | |
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268 | 268 | self.aliases = {} |
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269 | 269 | |
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270 | 270 | # Create color table: we copy the default one from the traceback |
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271 | 271 | # module and add a few attributes needed for debugging |
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272 | 272 | self.color_scheme_table = exception_colors() |
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273 | 273 | |
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274 | 274 | # shorthands |
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275 | 275 | C = coloransi.TermColors |
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276 | 276 | cst = self.color_scheme_table |
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277 | 277 | |
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278 | 278 | cst['NoColor'].colors.prompt = C.NoColor |
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279 | 279 | cst['NoColor'].colors.breakpoint_enabled = C.NoColor |
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280 | 280 | cst['NoColor'].colors.breakpoint_disabled = C.NoColor |
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281 | 281 | |
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282 | 282 | cst['Linux'].colors.prompt = C.Green |
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283 | 283 | cst['Linux'].colors.breakpoint_enabled = C.LightRed |
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284 | 284 | cst['Linux'].colors.breakpoint_disabled = C.Red |
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285 | 285 | |
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286 | 286 | cst['LightBG'].colors.prompt = C.Blue |
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287 | 287 | cst['LightBG'].colors.breakpoint_enabled = C.LightRed |
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288 | 288 | cst['LightBG'].colors.breakpoint_disabled = C.Red |
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289 | 289 | |
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290 | 290 | cst['Neutral'].colors.prompt = C.Blue |
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291 | 291 | cst['Neutral'].colors.breakpoint_enabled = C.LightRed |
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292 | 292 | cst['Neutral'].colors.breakpoint_disabled = C.Red |
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293 | 293 | |
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294 | 294 | # Add a python parser so we can syntax highlight source while |
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295 | 295 | # debugging. |
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296 | 296 | self.parser = PyColorize.Parser(style=color_scheme) |
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297 | 297 | self.set_colors(color_scheme) |
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298 | 298 | |
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299 | 299 | # Set the prompt - the default prompt is '(Pdb)' |
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300 | 300 | self.prompt = prompt |
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301 | 301 | self.skip_hidden = True |
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302 | self.report_skipped = True | |
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302 | 303 | |
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303 | 304 | # list of predicates we use to skip frames |
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304 | 305 | self._predicates = self.default_predicates |
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305 | 306 | |
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306 | 307 | def set_colors(self, scheme): |
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307 | 308 | """Shorthand access to the color table scheme selector method.""" |
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308 | 309 | self.color_scheme_table.set_active_scheme(scheme) |
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309 | 310 | self.parser.style = scheme |
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310 | 311 | |
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311 | 312 | def set_trace(self, frame=None): |
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312 | 313 | if frame is None: |
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313 | 314 | frame = sys._getframe().f_back |
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314 | 315 | self.initial_frame = frame |
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315 | 316 | return super().set_trace(frame) |
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316 | 317 | |
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317 | 318 | def _hidden_predicate(self, frame): |
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318 | 319 | """ |
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319 | 320 | Given a frame return whether it it should be hidden or not by IPython. |
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320 | 321 | """ |
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321 | 322 | |
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322 | 323 | if self._predicates["readonly"]: |
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323 | 324 | fname = frame.f_code.co_filename |
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324 | 325 | # we need to check for file existence and interactively define |
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325 | 326 | # function would otherwise appear as RO. |
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326 | 327 | if os.path.isfile(fname) and not os.access(fname, os.W_OK): |
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327 | 328 | return True |
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328 | 329 | |
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329 | 330 | if self._predicates["tbhide"]: |
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330 | 331 | if frame in (self.curframe, getattr(self, "initial_frame", None)): |
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331 | 332 | return False |
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332 | 333 | else: |
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333 | 334 | return frame.f_locals.get("__tracebackhide__", False) |
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334 | 335 | |
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335 | 336 | return False |
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336 | 337 | |
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337 | 338 | def hidden_frames(self, stack): |
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338 | 339 | """ |
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339 | 340 | Given an index in the stack return whether it should be skipped. |
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340 | 341 | |
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341 | 342 | This is used in up/down and where to skip frames. |
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342 | 343 | """ |
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343 | 344 | # The f_locals dictionary is updated from the actual frame |
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344 | 345 | # locals whenever the .f_locals accessor is called, so we |
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345 | 346 | # avoid calling it here to preserve self.curframe_locals. |
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346 | 347 | # Futhermore, there is no good reason to hide the current frame. |
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347 | 348 | ip_hide = [self._hidden_predicate(s[0]) for s in stack] |
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348 | 349 | ip_start = [i for i, s in enumerate(ip_hide) if s == "__ipython_bottom__"] |
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349 | 350 | if ip_start and self._predicates["ipython_internal"]: |
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350 | 351 | ip_hide = [h if i > ip_start[0] else True for (i, h) in enumerate(ip_hide)] |
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351 | 352 | return ip_hide |
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352 | 353 | |
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353 | 354 | def interaction(self, frame, traceback): |
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354 | 355 | try: |
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355 | 356 | OldPdb.interaction(self, frame, traceback) |
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356 | 357 | except KeyboardInterrupt: |
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357 | 358 | self.stdout.write("\n" + self.shell.get_exception_only()) |
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358 | 359 | |
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359 | 360 | def precmd(self, line): |
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360 | 361 | """Perform useful escapes on the command before it is executed.""" |
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361 | 362 | |
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362 | 363 | if line.endswith("??"): |
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363 | 364 | line = "pinfo2 " + line[:-2] |
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364 | 365 | elif line.endswith("?"): |
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365 | 366 | line = "pinfo " + line[:-1] |
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366 | 367 | |
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367 | 368 | line = super().precmd(line) |
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368 | 369 | |
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369 | 370 | return line |
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370 | 371 | |
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371 | 372 | def new_do_frame(self, arg): |
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372 | 373 | OldPdb.do_frame(self, arg) |
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373 | 374 | |
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374 | 375 | def new_do_quit(self, arg): |
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375 | 376 | |
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376 | 377 | if hasattr(self, 'old_all_completions'): |
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377 | 378 | self.shell.Completer.all_completions = self.old_all_completions |
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378 | 379 | |
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379 | 380 | return OldPdb.do_quit(self, arg) |
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380 | 381 | |
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381 | 382 | do_q = do_quit = decorate_fn_with_doc(new_do_quit, OldPdb.do_quit) |
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382 | 383 | |
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383 | 384 | def new_do_restart(self, arg): |
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384 | 385 | """Restart command. In the context of ipython this is exactly the same |
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385 | 386 | thing as 'quit'.""" |
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386 | 387 | self.msg("Restart doesn't make sense here. Using 'quit' instead.") |
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387 | 388 | return self.do_quit(arg) |
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388 | 389 | |
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389 | 390 | def print_stack_trace(self, context=None): |
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390 | 391 | Colors = self.color_scheme_table.active_colors |
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391 | 392 | ColorsNormal = Colors.Normal |
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392 | 393 | if context is None: |
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393 | 394 | context = self.context |
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394 | 395 | try: |
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395 | 396 | context = int(context) |
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396 | 397 | if context <= 0: |
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397 | 398 | raise ValueError("Context must be a positive integer") |
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398 | 399 | except (TypeError, ValueError) as e: |
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399 | 400 | raise ValueError("Context must be a positive integer") from e |
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400 | 401 | try: |
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401 | 402 | skipped = 0 |
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402 | 403 | for hidden, frame_lineno in zip(self.hidden_frames(self.stack), self.stack): |
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403 | 404 | if hidden and self.skip_hidden: |
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404 | 405 | skipped += 1 |
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405 | 406 | continue |
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406 | 407 | if skipped: |
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407 | 408 | print( |
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408 | 409 | f"{Colors.excName} [... skipping {skipped} hidden frame(s)]{ColorsNormal}\n" |
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409 | 410 | ) |
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410 | 411 | skipped = 0 |
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411 | 412 | self.print_stack_entry(frame_lineno, context=context) |
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412 | 413 | if skipped: |
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413 | 414 | print( |
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414 | 415 | f"{Colors.excName} [... skipping {skipped} hidden frame(s)]{ColorsNormal}\n" |
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415 | 416 | ) |
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416 | 417 | except KeyboardInterrupt: |
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417 | 418 | pass |
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418 | 419 | |
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419 | 420 | def print_stack_entry(self, frame_lineno, prompt_prefix='\n-> ', |
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420 | 421 | context=None): |
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421 | 422 | if context is None: |
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422 | 423 | context = self.context |
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423 | 424 | try: |
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424 | 425 | context = int(context) |
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425 | 426 | if context <= 0: |
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426 | 427 | raise ValueError("Context must be a positive integer") |
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427 | 428 | except (TypeError, ValueError) as e: |
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428 | 429 | raise ValueError("Context must be a positive integer") from e |
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429 | 430 | print(self.format_stack_entry(frame_lineno, '', context), file=self.stdout) |
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430 | 431 | |
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431 | 432 | # vds: >> |
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432 | 433 | frame, lineno = frame_lineno |
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433 | 434 | filename = frame.f_code.co_filename |
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434 | 435 | self.shell.hooks.synchronize_with_editor(filename, lineno, 0) |
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435 | 436 | # vds: << |
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436 | 437 | |
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437 | 438 | def format_stack_entry(self, frame_lineno, lprefix=': ', context=None): |
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438 | 439 | if context is None: |
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439 | 440 | context = self.context |
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440 | 441 | try: |
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441 | 442 | context = int(context) |
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442 | 443 | if context <= 0: |
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443 | 444 | print("Context must be a positive integer", file=self.stdout) |
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444 | 445 | except (TypeError, ValueError): |
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445 | 446 | print("Context must be a positive integer", file=self.stdout) |
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446 | 447 | |
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447 | 448 | import reprlib |
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448 | 449 | |
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449 | 450 | ret = [] |
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450 | 451 | |
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451 | 452 | Colors = self.color_scheme_table.active_colors |
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452 | 453 | ColorsNormal = Colors.Normal |
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453 | 454 | tpl_link = "%s%%s%s" % (Colors.filenameEm, ColorsNormal) |
|
454 | 455 | tpl_call = "%s%%s%s%%s%s" % (Colors.vName, Colors.valEm, ColorsNormal) |
|
455 | 456 | tpl_line = "%%s%s%%s %s%%s" % (Colors.lineno, ColorsNormal) |
|
456 | 457 | tpl_line_em = "%%s%s%%s %s%%s%s" % (Colors.linenoEm, Colors.line, ColorsNormal) |
|
457 | 458 | |
|
458 | 459 | frame, lineno = frame_lineno |
|
459 | 460 | |
|
460 | 461 | return_value = '' |
|
461 | 462 | if '__return__' in frame.f_locals: |
|
462 | 463 | rv = frame.f_locals['__return__'] |
|
463 | 464 | #return_value += '->' |
|
464 | 465 | return_value += reprlib.repr(rv) + '\n' |
|
465 | 466 | ret.append(return_value) |
|
466 | 467 | |
|
467 | 468 | #s = filename + '(' + `lineno` + ')' |
|
468 | 469 | filename = self.canonic(frame.f_code.co_filename) |
|
469 | 470 | link = tpl_link % py3compat.cast_unicode(filename) |
|
470 | 471 | |
|
471 | 472 | if frame.f_code.co_name: |
|
472 | 473 | func = frame.f_code.co_name |
|
473 | 474 | else: |
|
474 | 475 | func = "<lambda>" |
|
475 | 476 | |
|
476 | 477 | call = '' |
|
477 | 478 | if func != '?': |
|
478 | 479 | if '__args__' in frame.f_locals: |
|
479 | 480 | args = reprlib.repr(frame.f_locals['__args__']) |
|
480 | 481 | else: |
|
481 | 482 | args = '()' |
|
482 | 483 | call = tpl_call % (func, args) |
|
483 | 484 | |
|
484 | 485 | # The level info should be generated in the same format pdb uses, to |
|
485 | 486 | # avoid breaking the pdbtrack functionality of python-mode in *emacs. |
|
486 | 487 | if frame is self.curframe: |
|
487 | 488 | ret.append('> ') |
|
488 | 489 | else: |
|
489 | 490 | ret.append(" ") |
|
490 | 491 | ret.append("%s(%s)%s\n" % (link, lineno, call)) |
|
491 | 492 | |
|
492 | 493 | start = lineno - 1 - context//2 |
|
493 | 494 | lines = linecache.getlines(filename) |
|
494 | 495 | start = min(start, len(lines) - context) |
|
495 | 496 | start = max(start, 0) |
|
496 | 497 | lines = lines[start : start + context] |
|
497 | 498 | |
|
498 | 499 | for i, line in enumerate(lines): |
|
499 | 500 | show_arrow = start + 1 + i == lineno |
|
500 | 501 | linetpl = (frame is self.curframe or show_arrow) and tpl_line_em or tpl_line |
|
501 | 502 | ret.append( |
|
502 | 503 | self.__format_line( |
|
503 | 504 | linetpl, filename, start + 1 + i, line, arrow=show_arrow |
|
504 | 505 | ) |
|
505 | 506 | ) |
|
506 | 507 | return "".join(ret) |
|
507 | 508 | |
|
508 | 509 | def __format_line(self, tpl_line, filename, lineno, line, arrow=False): |
|
509 | 510 | bp_mark = "" |
|
510 | 511 | bp_mark_color = "" |
|
511 | 512 | |
|
512 | 513 | new_line, err = self.parser.format2(line, 'str') |
|
513 | 514 | if not err: |
|
514 | 515 | line = new_line |
|
515 | 516 | |
|
516 | 517 | bp = None |
|
517 | 518 | if lineno in self.get_file_breaks(filename): |
|
518 | 519 | bps = self.get_breaks(filename, lineno) |
|
519 | 520 | bp = bps[-1] |
|
520 | 521 | |
|
521 | 522 | if bp: |
|
522 | 523 | Colors = self.color_scheme_table.active_colors |
|
523 | 524 | bp_mark = str(bp.number) |
|
524 | 525 | bp_mark_color = Colors.breakpoint_enabled |
|
525 | 526 | if not bp.enabled: |
|
526 | 527 | bp_mark_color = Colors.breakpoint_disabled |
|
527 | 528 | |
|
528 | 529 | numbers_width = 7 |
|
529 | 530 | if arrow: |
|
530 | 531 | # This is the line with the error |
|
531 | 532 | pad = numbers_width - len(str(lineno)) - len(bp_mark) |
|
532 | 533 | num = '%s%s' % (make_arrow(pad), str(lineno)) |
|
533 | 534 | else: |
|
534 | 535 | num = '%*s' % (numbers_width - len(bp_mark), str(lineno)) |
|
535 | 536 | |
|
536 | 537 | return tpl_line % (bp_mark_color + bp_mark, num, line) |
|
537 | 538 | |
|
538 | 539 | def print_list_lines(self, filename, first, last): |
|
539 | 540 | """The printing (as opposed to the parsing part of a 'list' |
|
540 | 541 | command.""" |
|
541 | 542 | try: |
|
542 | 543 | Colors = self.color_scheme_table.active_colors |
|
543 | 544 | ColorsNormal = Colors.Normal |
|
544 | 545 | tpl_line = '%%s%s%%s %s%%s' % (Colors.lineno, ColorsNormal) |
|
545 | 546 | tpl_line_em = '%%s%s%%s %s%%s%s' % (Colors.linenoEm, Colors.line, ColorsNormal) |
|
546 | 547 | src = [] |
|
547 | 548 | if filename == "<string>" and hasattr(self, "_exec_filename"): |
|
548 | 549 | filename = self._exec_filename |
|
549 | 550 | |
|
550 | 551 | for lineno in range(first, last+1): |
|
551 | 552 | line = linecache.getline(filename, lineno) |
|
552 | 553 | if not line: |
|
553 | 554 | break |
|
554 | 555 | |
|
555 | 556 | if lineno == self.curframe.f_lineno: |
|
556 | 557 | line = self.__format_line( |
|
557 | 558 | tpl_line_em, filename, lineno, line, arrow=True |
|
558 | 559 | ) |
|
559 | 560 | else: |
|
560 | 561 | line = self.__format_line( |
|
561 | 562 | tpl_line, filename, lineno, line, arrow=False |
|
562 | 563 | ) |
|
563 | 564 | |
|
564 | 565 | src.append(line) |
|
565 | 566 | self.lineno = lineno |
|
566 | 567 | |
|
567 | 568 | print(''.join(src), file=self.stdout) |
|
568 | 569 | |
|
569 | 570 | except KeyboardInterrupt: |
|
570 | 571 | pass |
|
571 | 572 | |
|
572 | 573 | def do_skip_predicates(self, args): |
|
573 | 574 | """ |
|
574 | 575 | Turn on/off individual predicates as to whether a frame should be hidden/skip. |
|
575 | 576 | |
|
576 | 577 | The global option to skip (or not) hidden frames is set with skip_hidden |
|
577 | 578 | |
|
578 | 579 | To change the value of a predicate |
|
579 | 580 | |
|
580 | 581 | skip_predicates key [true|false] |
|
581 | 582 | |
|
582 | 583 | Call without arguments to see the current values. |
|
583 | 584 | |
|
584 | 585 | To permanently change the value of an option add the corresponding |
|
585 | 586 | command to your ``~/.pdbrc`` file. If you are programmatically using the |
|
586 | 587 | Pdb instance you can also change the ``default_predicates`` class |
|
587 | 588 | attribute. |
|
588 | 589 | """ |
|
589 | 590 | if not args.strip(): |
|
590 | 591 | print("current predicates:") |
|
591 | 592 | for (p, v) in self._predicates.items(): |
|
592 | 593 | print(" ", p, ":", v) |
|
593 | 594 | return |
|
594 | 595 | type_value = args.strip().split(" ") |
|
595 | 596 | if len(type_value) != 2: |
|
596 | 597 | print( |
|
597 | 598 | f"Usage: skip_predicates <type> <value>, with <type> one of {set(self._predicates.keys())}" |
|
598 | 599 | ) |
|
599 | 600 | return |
|
600 | 601 | |
|
601 | 602 | type_, value = type_value |
|
602 | 603 | if type_ not in self._predicates: |
|
603 | 604 | print(f"{type_!r} not in {set(self._predicates.keys())}") |
|
604 | 605 | return |
|
605 | 606 | if value.lower() not in ("true", "yes", "1", "no", "false", "0"): |
|
606 | 607 | print( |
|
607 | 608 | f"{value!r} is invalid - use one of ('true', 'yes', '1', 'no', 'false', '0')" |
|
608 | 609 | ) |
|
609 | 610 | return |
|
610 | 611 | |
|
611 | 612 | self._predicates[type_] = value.lower() in ("true", "yes", "1") |
|
612 | 613 | if not any(self._predicates.values()): |
|
613 | 614 | print( |
|
614 | 615 | "Warning, all predicates set to False, skip_hidden may not have any effects." |
|
615 | 616 | ) |
|
616 | 617 | |
|
617 | 618 | def do_skip_hidden(self, arg): |
|
618 | 619 | """ |
|
619 | 620 | Change whether or not we should skip frames with the |
|
620 | 621 | __tracebackhide__ attribute. |
|
621 | 622 | """ |
|
622 | 623 | if not arg.strip(): |
|
623 | 624 | print( |
|
624 | 625 | f"skip_hidden = {self.skip_hidden}, use 'yes','no', 'true', or 'false' to change." |
|
625 | 626 | ) |
|
626 | 627 | elif arg.strip().lower() in ("true", "yes"): |
|
627 | 628 | self.skip_hidden = True |
|
628 | 629 | elif arg.strip().lower() in ("false", "no"): |
|
629 | 630 | self.skip_hidden = False |
|
630 | 631 | if not any(self._predicates.values()): |
|
631 | 632 | print( |
|
632 | 633 | "Warning, all predicates set to False, skip_hidden may not have any effects." |
|
633 | 634 | ) |
|
634 | 635 | |
|
635 | 636 | def do_list(self, arg): |
|
636 | 637 | """Print lines of code from the current stack frame |
|
637 | 638 | """ |
|
638 | 639 | self.lastcmd = 'list' |
|
639 | 640 | last = None |
|
640 | 641 | if arg: |
|
641 | 642 | try: |
|
642 | 643 | x = eval(arg, {}, {}) |
|
643 | 644 | if type(x) == type(()): |
|
644 | 645 | first, last = x |
|
645 | 646 | first = int(first) |
|
646 | 647 | last = int(last) |
|
647 | 648 | if last < first: |
|
648 | 649 | # Assume it's a count |
|
649 | 650 | last = first + last |
|
650 | 651 | else: |
|
651 | 652 | first = max(1, int(x) - 5) |
|
652 | 653 | except: |
|
653 | 654 | print('*** Error in argument:', repr(arg), file=self.stdout) |
|
654 | 655 | return |
|
655 | 656 | elif self.lineno is None: |
|
656 | 657 | first = max(1, self.curframe.f_lineno - 5) |
|
657 | 658 | else: |
|
658 | 659 | first = self.lineno + 1 |
|
659 | 660 | if last is None: |
|
660 | 661 | last = first + 10 |
|
661 | 662 | self.print_list_lines(self.curframe.f_code.co_filename, first, last) |
|
662 | 663 | |
|
663 | 664 | # vds: >> |
|
664 | 665 | lineno = first |
|
665 | 666 | filename = self.curframe.f_code.co_filename |
|
666 | 667 | self.shell.hooks.synchronize_with_editor(filename, lineno, 0) |
|
667 | 668 | # vds: << |
|
668 | 669 | |
|
669 | 670 | do_l = do_list |
|
670 | 671 | |
|
671 | 672 | def getsourcelines(self, obj): |
|
672 | 673 | lines, lineno = inspect.findsource(obj) |
|
673 | 674 | if inspect.isframe(obj) and obj.f_globals is obj.f_locals: |
|
674 | 675 | # must be a module frame: do not try to cut a block out of it |
|
675 | 676 | return lines, 1 |
|
676 | 677 | elif inspect.ismodule(obj): |
|
677 | 678 | return lines, 1 |
|
678 | 679 | return inspect.getblock(lines[lineno:]), lineno+1 |
|
679 | 680 | |
|
680 | 681 | def do_longlist(self, arg): |
|
681 | 682 | """Print lines of code from the current stack frame. |
|
682 | 683 | |
|
683 | 684 | Shows more lines than 'list' does. |
|
684 | 685 | """ |
|
685 | 686 | self.lastcmd = 'longlist' |
|
686 | 687 | try: |
|
687 | 688 | lines, lineno = self.getsourcelines(self.curframe) |
|
688 | 689 | except OSError as err: |
|
689 | 690 | self.error(err) |
|
690 | 691 | return |
|
691 | 692 | last = lineno + len(lines) |
|
692 | 693 | self.print_list_lines(self.curframe.f_code.co_filename, lineno, last) |
|
693 | 694 | do_ll = do_longlist |
|
694 | 695 | |
|
695 | 696 | def do_debug(self, arg): |
|
696 | 697 | """debug code |
|
697 | 698 | Enter a recursive debugger that steps through the code |
|
698 | 699 | argument (which is an arbitrary expression or statement to be |
|
699 | 700 | executed in the current environment). |
|
700 | 701 | """ |
|
701 | 702 | trace_function = sys.gettrace() |
|
702 | 703 | sys.settrace(None) |
|
703 | 704 | globals = self.curframe.f_globals |
|
704 | 705 | locals = self.curframe_locals |
|
705 | 706 | p = self.__class__(completekey=self.completekey, |
|
706 | 707 | stdin=self.stdin, stdout=self.stdout) |
|
707 | 708 | p.use_rawinput = self.use_rawinput |
|
708 | 709 | p.prompt = "(%s) " % self.prompt.strip() |
|
709 | 710 | self.message("ENTERING RECURSIVE DEBUGGER") |
|
710 | 711 | sys.call_tracing(p.run, (arg, globals, locals)) |
|
711 | 712 | self.message("LEAVING RECURSIVE DEBUGGER") |
|
712 | 713 | sys.settrace(trace_function) |
|
713 | 714 | self.lastcmd = p.lastcmd |
|
714 | 715 | |
|
715 | 716 | def do_pdef(self, arg): |
|
716 | 717 | """Print the call signature for any callable object. |
|
717 | 718 | |
|
718 | 719 | The debugger interface to %pdef""" |
|
719 | 720 | namespaces = [ |
|
720 | 721 | ("Locals", self.curframe_locals), |
|
721 | 722 | ("Globals", self.curframe.f_globals), |
|
722 | 723 | ] |
|
723 | 724 | self.shell.find_line_magic("pdef")(arg, namespaces=namespaces) |
|
724 | 725 | |
|
725 | 726 | def do_pdoc(self, arg): |
|
726 | 727 | """Print the docstring for an object. |
|
727 | 728 | |
|
728 | 729 | The debugger interface to %pdoc.""" |
|
729 | 730 | namespaces = [ |
|
730 | 731 | ("Locals", self.curframe_locals), |
|
731 | 732 | ("Globals", self.curframe.f_globals), |
|
732 | 733 | ] |
|
733 | 734 | self.shell.find_line_magic("pdoc")(arg, namespaces=namespaces) |
|
734 | 735 | |
|
735 | 736 | def do_pfile(self, arg): |
|
736 | 737 | """Print (or run through pager) the file where an object is defined. |
|
737 | 738 | |
|
738 | 739 | The debugger interface to %pfile. |
|
739 | 740 | """ |
|
740 | 741 | namespaces = [ |
|
741 | 742 | ("Locals", self.curframe_locals), |
|
742 | 743 | ("Globals", self.curframe.f_globals), |
|
743 | 744 | ] |
|
744 | 745 | self.shell.find_line_magic("pfile")(arg, namespaces=namespaces) |
|
745 | 746 | |
|
746 | 747 | def do_pinfo(self, arg): |
|
747 | 748 | """Provide detailed information about an object. |
|
748 | 749 | |
|
749 | 750 | The debugger interface to %pinfo, i.e., obj?.""" |
|
750 | 751 | namespaces = [ |
|
751 | 752 | ("Locals", self.curframe_locals), |
|
752 | 753 | ("Globals", self.curframe.f_globals), |
|
753 | 754 | ] |
|
754 | 755 | self.shell.find_line_magic("pinfo")(arg, namespaces=namespaces) |
|
755 | 756 | |
|
756 | 757 | def do_pinfo2(self, arg): |
|
757 | 758 | """Provide extra detailed information about an object. |
|
758 | 759 | |
|
759 | 760 | The debugger interface to %pinfo2, i.e., obj??.""" |
|
760 | 761 | namespaces = [ |
|
761 | 762 | ("Locals", self.curframe_locals), |
|
762 | 763 | ("Globals", self.curframe.f_globals), |
|
763 | 764 | ] |
|
764 | 765 | self.shell.find_line_magic("pinfo2")(arg, namespaces=namespaces) |
|
765 | 766 | |
|
766 | 767 | def do_psource(self, arg): |
|
767 | 768 | """Print (or run through pager) the source code for an object.""" |
|
768 | 769 | namespaces = [ |
|
769 | 770 | ("Locals", self.curframe_locals), |
|
770 | 771 | ("Globals", self.curframe.f_globals), |
|
771 | 772 | ] |
|
772 | 773 | self.shell.find_line_magic("psource")(arg, namespaces=namespaces) |
|
773 | 774 | |
|
774 | 775 | def do_where(self, arg): |
|
775 | 776 | """w(here) |
|
776 | 777 | Print a stack trace, with the most recent frame at the bottom. |
|
777 | 778 | An arrow indicates the "current frame", which determines the |
|
778 | 779 | context of most commands. 'bt' is an alias for this command. |
|
779 | 780 | |
|
780 | 781 | Take a number as argument as an (optional) number of context line to |
|
781 | 782 | print""" |
|
782 | 783 | if arg: |
|
783 | 784 | try: |
|
784 | 785 | context = int(arg) |
|
785 | 786 | except ValueError as err: |
|
786 | 787 | self.error(err) |
|
787 | 788 | return |
|
788 | 789 | self.print_stack_trace(context) |
|
789 | 790 | else: |
|
790 | 791 | self.print_stack_trace() |
|
791 | 792 | |
|
792 | 793 | do_w = do_where |
|
793 | 794 | |
|
794 | 795 | def stop_here(self, frame): |
|
795 | 796 | hidden = False |
|
796 | 797 | if self.skip_hidden: |
|
797 | 798 | hidden = self._hidden_predicate(frame) |
|
798 | 799 | if hidden: |
|
799 | Colors = self.color_scheme_table.active_colors | |
|
800 | ColorsNormal = Colors.Normal | |
|
801 | print(f"{Colors.excName} [... skipped 1 hidden frame]{ColorsNormal}\n") | |
|
802 | ||
|
800 | if self.report_skipped: | |
|
801 | Colors = self.color_scheme_table.active_colors | |
|
802 | ColorsNormal = Colors.Normal | |
|
803 | print( | |
|
804 | f"{Colors.excName} [... skipped 1 hidden frame]{ColorsNormal}\n" | |
|
805 | ) | |
|
803 | 806 | return super().stop_here(frame) |
|
804 | 807 | |
|
805 | 808 | def do_up(self, arg): |
|
806 | 809 | """u(p) [count] |
|
807 | 810 | Move the current frame count (default one) levels up in the |
|
808 | 811 | stack trace (to an older frame). |
|
809 | 812 | |
|
810 | 813 | Will skip hidden frames. |
|
811 | 814 | """ |
|
812 | 815 | # modified version of upstream that skips |
|
813 | 816 | # frames with __tracebackhide__ |
|
814 | 817 | if self.curindex == 0: |
|
815 | 818 | self.error("Oldest frame") |
|
816 | 819 | return |
|
817 | 820 | try: |
|
818 | 821 | count = int(arg or 1) |
|
819 | 822 | except ValueError: |
|
820 | 823 | self.error("Invalid frame count (%s)" % arg) |
|
821 | 824 | return |
|
822 | 825 | skipped = 0 |
|
823 | 826 | if count < 0: |
|
824 | 827 | _newframe = 0 |
|
825 | 828 | else: |
|
826 | 829 | counter = 0 |
|
827 | 830 | hidden_frames = self.hidden_frames(self.stack) |
|
828 | 831 | for i in range(self.curindex - 1, -1, -1): |
|
829 | 832 | if hidden_frames[i] and self.skip_hidden: |
|
830 | 833 | skipped += 1 |
|
831 | 834 | continue |
|
832 | 835 | counter += 1 |
|
833 | 836 | if counter >= count: |
|
834 | 837 | break |
|
835 | 838 | else: |
|
836 | 839 | # if no break occured. |
|
837 | 840 | self.error( |
|
838 | 841 | "all frames above hidden, use `skip_hidden False` to get get into those." |
|
839 | 842 | ) |
|
840 | 843 | return |
|
841 | 844 | |
|
842 | 845 | Colors = self.color_scheme_table.active_colors |
|
843 | 846 | ColorsNormal = Colors.Normal |
|
844 | 847 | _newframe = i |
|
845 | 848 | self._select_frame(_newframe) |
|
846 | 849 | if skipped: |
|
847 | 850 | print( |
|
848 | 851 | f"{Colors.excName} [... skipped {skipped} hidden frame(s)]{ColorsNormal}\n" |
|
849 | 852 | ) |
|
850 | 853 | |
|
851 | 854 | def do_down(self, arg): |
|
852 | 855 | """d(own) [count] |
|
853 | 856 | Move the current frame count (default one) levels down in the |
|
854 | 857 | stack trace (to a newer frame). |
|
855 | 858 | |
|
856 | 859 | Will skip hidden frames. |
|
857 | 860 | """ |
|
858 | 861 | if self.curindex + 1 == len(self.stack): |
|
859 | 862 | self.error("Newest frame") |
|
860 | 863 | return |
|
861 | 864 | try: |
|
862 | 865 | count = int(arg or 1) |
|
863 | 866 | except ValueError: |
|
864 | 867 | self.error("Invalid frame count (%s)" % arg) |
|
865 | 868 | return |
|
866 | 869 | if count < 0: |
|
867 | 870 | _newframe = len(self.stack) - 1 |
|
868 | 871 | else: |
|
869 | 872 | counter = 0 |
|
870 | 873 | skipped = 0 |
|
871 | 874 | hidden_frames = self.hidden_frames(self.stack) |
|
872 | 875 | for i in range(self.curindex + 1, len(self.stack)): |
|
873 | 876 | if hidden_frames[i] and self.skip_hidden: |
|
874 | 877 | skipped += 1 |
|
875 | 878 | continue |
|
876 | 879 | counter += 1 |
|
877 | 880 | if counter >= count: |
|
878 | 881 | break |
|
879 | 882 | else: |
|
880 | 883 | self.error( |
|
881 | 884 | "all frames bellow hidden, use `skip_hidden False` to get get into those." |
|
882 | 885 | ) |
|
883 | 886 | return |
|
884 | 887 | |
|
885 | 888 | Colors = self.color_scheme_table.active_colors |
|
886 | 889 | ColorsNormal = Colors.Normal |
|
887 | 890 | if skipped: |
|
888 | 891 | print( |
|
889 | 892 | f"{Colors.excName} [... skipped {skipped} hidden frame(s)]{ColorsNormal}\n" |
|
890 | 893 | ) |
|
891 | 894 | _newframe = i |
|
892 | 895 | |
|
893 | 896 | self._select_frame(_newframe) |
|
894 | 897 | |
|
895 | 898 | do_d = do_down |
|
896 | 899 | do_u = do_up |
|
897 | 900 | |
|
898 | 901 | def do_context(self, context): |
|
899 | 902 | """context number_of_lines |
|
900 | 903 | Set the number of lines of source code to show when displaying |
|
901 | 904 | stacktrace information. |
|
902 | 905 | """ |
|
903 | 906 | try: |
|
904 | 907 | new_context = int(context) |
|
905 | 908 | if new_context <= 0: |
|
906 | 909 | raise ValueError() |
|
907 | 910 | self.context = new_context |
|
908 | 911 | except ValueError: |
|
909 | 912 | self.error("The 'context' command requires a positive integer argument.") |
|
910 | 913 | |
|
911 | 914 | |
|
912 | 915 | class InterruptiblePdb(Pdb): |
|
913 | 916 | """Version of debugger where KeyboardInterrupt exits the debugger altogether.""" |
|
914 | 917 | |
|
915 | 918 | def cmdloop(self): |
|
916 | 919 | """Wrap cmdloop() such that KeyboardInterrupt stops the debugger.""" |
|
917 | 920 | try: |
|
918 | 921 | return OldPdb.cmdloop(self) |
|
919 | 922 | except KeyboardInterrupt: |
|
920 | 923 | self.stop_here = lambda frame: False |
|
921 | 924 | self.do_quit("") |
|
922 | 925 | sys.settrace(None) |
|
923 | 926 | self.quitting = False |
|
924 | 927 | raise |
|
925 | 928 | |
|
926 | 929 | def _cmdloop(self): |
|
927 | 930 | while True: |
|
928 | 931 | try: |
|
929 | 932 | # keyboard interrupts allow for an easy way to cancel |
|
930 | 933 | # the current command, so allow them during interactive input |
|
931 | 934 | self.allow_kbdint = True |
|
932 | 935 | self.cmdloop() |
|
933 | 936 | self.allow_kbdint = False |
|
934 | 937 | break |
|
935 | 938 | except KeyboardInterrupt: |
|
936 | 939 | self.message('--KeyboardInterrupt--') |
|
937 | 940 | raise |
|
938 | 941 | |
|
939 | 942 | |
|
940 | 943 | def set_trace(frame=None): |
|
941 | 944 | """ |
|
942 | 945 | Start debugging from `frame`. |
|
943 | 946 | |
|
944 | 947 | If frame is not specified, debugging starts from caller's frame. |
|
945 | 948 | """ |
|
946 | 949 | Pdb().set_trace(frame or sys._getframe().f_back) |
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