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1 | 1 | """Implementation of basic magic functions.""" |
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2 | 2 | |
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3 | 3 | |
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4 | 4 | import argparse |
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5 | 5 | from logging import error |
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6 | 6 | import io |
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7 | 7 | from pprint import pformat |
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8 | 8 | import textwrap |
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9 | 9 | import sys |
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10 | 10 | from warnings import warn |
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11 | 11 | |
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12 | 12 | from traitlets.utils.importstring import import_item |
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13 | 13 | from IPython.core import magic_arguments, page |
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14 | 14 | from IPython.core.error import UsageError |
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15 | 15 | from IPython.core.magic import Magics, magics_class, line_magic, magic_escapes |
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16 | 16 | from IPython.utils.text import format_screen, dedent, indent |
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17 | 17 | from IPython.testing.skipdoctest import skip_doctest |
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18 | 18 | from IPython.utils.ipstruct import Struct |
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19 | 19 | |
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20 | 20 | |
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21 | 21 | class MagicsDisplay(object): |
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22 | 22 | def __init__(self, magics_manager, ignore=None): |
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23 | 23 | self.ignore = ignore if ignore else [] |
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24 | 24 | self.magics_manager = magics_manager |
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25 | 25 | |
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26 | 26 | def _lsmagic(self): |
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27 | 27 | """The main implementation of the %lsmagic""" |
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28 | 28 | mesc = magic_escapes['line'] |
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29 | 29 | cesc = magic_escapes['cell'] |
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30 | 30 | mman = self.magics_manager |
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31 | 31 | magics = mman.lsmagic() |
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32 | 32 | out = ['Available line magics:', |
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33 | 33 | mesc + (' '+mesc).join(sorted([m for m,v in magics['line'].items() if (v not in self.ignore)])), |
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34 | 34 | '', |
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35 | 35 | 'Available cell magics:', |
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36 | 36 | cesc + (' '+cesc).join(sorted([m for m,v in magics['cell'].items() if (v not in self.ignore)])), |
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37 | 37 | '', |
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38 | 38 | mman.auto_status()] |
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39 | 39 | return '\n'.join(out) |
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40 | 40 | |
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41 | 41 | def _repr_pretty_(self, p, cycle): |
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42 | 42 | p.text(self._lsmagic()) |
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43 | 43 | |
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44 | 44 | def __str__(self): |
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45 | 45 | return self._lsmagic() |
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46 | 46 | |
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47 | 47 | def _jsonable(self): |
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48 | 48 | """turn magics dict into jsonable dict of the same structure |
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49 | 49 | |
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50 | 50 | replaces object instances with their class names as strings |
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51 | 51 | """ |
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52 | 52 | magic_dict = {} |
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53 | 53 | mman = self.magics_manager |
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54 | 54 | magics = mman.lsmagic() |
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55 | 55 | for key, subdict in magics.items(): |
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56 | 56 | d = {} |
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57 | 57 | magic_dict[key] = d |
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58 | 58 | for name, obj in subdict.items(): |
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59 | 59 | try: |
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60 | 60 | classname = obj.__self__.__class__.__name__ |
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61 | 61 | except AttributeError: |
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62 | 62 | classname = 'Other' |
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63 | 63 | |
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64 | 64 | d[name] = classname |
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65 | 65 | return magic_dict |
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66 | 66 | |
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67 | 67 | def _repr_json_(self): |
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68 | 68 | return self._jsonable() |
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69 | 69 | |
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70 | 70 | |
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71 | 71 | @magics_class |
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72 | 72 | class BasicMagics(Magics): |
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73 | 73 | """Magics that provide central IPython functionality. |
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74 | 74 | |
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75 | 75 | These are various magics that don't fit into specific categories but that |
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76 | 76 | are all part of the base 'IPython experience'.""" |
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77 | 77 | |
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78 | 78 | @magic_arguments.magic_arguments() |
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79 | 79 | @magic_arguments.argument( |
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80 | 80 | '-l', '--line', action='store_true', |
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81 | 81 | help="""Create a line magic alias.""" |
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82 | 82 | ) |
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83 | 83 | @magic_arguments.argument( |
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84 | 84 | '-c', '--cell', action='store_true', |
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85 | 85 | help="""Create a cell magic alias.""" |
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86 | 86 | ) |
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87 | 87 | @magic_arguments.argument( |
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88 | 88 | 'name', |
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89 | 89 | help="""Name of the magic to be created.""" |
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90 | 90 | ) |
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91 | 91 | @magic_arguments.argument( |
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92 | 92 | 'target', |
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93 | 93 | help="""Name of the existing line or cell magic.""" |
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94 | 94 | ) |
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95 | 95 | @magic_arguments.argument( |
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96 | 96 | '-p', '--params', default=None, |
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97 | 97 | help="""Parameters passed to the magic function.""" |
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98 | 98 | ) |
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99 | 99 | @line_magic |
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100 | 100 | def alias_magic(self, line=''): |
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101 | 101 | """Create an alias for an existing line or cell magic. |
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102 | 102 | |
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103 | 103 | Examples |
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104 | 104 | -------- |
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105 | 105 | :: |
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106 | 106 | |
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107 | 107 | In [1]: %alias_magic t timeit |
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108 | 108 | Created `%t` as an alias for `%timeit`. |
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109 | 109 | Created `%%t` as an alias for `%%timeit`. |
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110 | 110 | |
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111 | 111 | In [2]: %t -n1 pass |
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112 | 112 | 1 loops, best of 3: 954 ns per loop |
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113 | 113 | |
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114 | 114 | In [3]: %%t -n1 |
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115 | 115 | ...: pass |
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116 | 116 | ...: |
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117 | 117 | 1 loops, best of 3: 954 ns per loop |
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118 | 118 | |
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119 | 119 | In [4]: %alias_magic --cell whereami pwd |
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120 | 120 | UsageError: Cell magic function `%%pwd` not found. |
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121 | 121 | In [5]: %alias_magic --line whereami pwd |
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122 | 122 | Created `%whereami` as an alias for `%pwd`. |
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123 | 123 | |
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124 | 124 | In [6]: %whereami |
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125 | 125 | Out[6]: u'/home/testuser' |
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126 | 126 | |
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127 | 127 | In [7]: %alias_magic h history -p "-l 30" --line |
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128 | 128 | Created `%h` as an alias for `%history -l 30`. |
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129 | 129 | """ |
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130 | 130 | |
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131 | 131 | args = magic_arguments.parse_argstring(self.alias_magic, line) |
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132 | 132 | shell = self.shell |
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133 | 133 | mman = self.shell.magics_manager |
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134 | 134 | escs = ''.join(magic_escapes.values()) |
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135 | 135 | |
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136 | 136 | target = args.target.lstrip(escs) |
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137 | 137 | name = args.name.lstrip(escs) |
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138 | 138 | |
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139 | 139 | params = args.params |
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140 | 140 | if (params and |
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141 | 141 | ((params.startswith('"') and params.endswith('"')) |
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142 | 142 | or (params.startswith("'") and params.endswith("'")))): |
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143 | 143 | params = params[1:-1] |
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144 | 144 | |
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145 | 145 | # Find the requested magics. |
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146 | 146 | m_line = shell.find_magic(target, 'line') |
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147 | 147 | m_cell = shell.find_magic(target, 'cell') |
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148 | 148 | if args.line and m_line is None: |
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149 | 149 | raise UsageError('Line magic function `%s%s` not found.' % |
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150 | 150 | (magic_escapes['line'], target)) |
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151 | 151 | if args.cell and m_cell is None: |
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152 | 152 | raise UsageError('Cell magic function `%s%s` not found.' % |
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153 | 153 | (magic_escapes['cell'], target)) |
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154 | 154 | |
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155 | 155 | # If --line and --cell are not specified, default to the ones |
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156 | 156 | # that are available. |
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157 | 157 | if not args.line and not args.cell: |
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158 | 158 | if not m_line and not m_cell: |
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159 | 159 | raise UsageError( |
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160 | 160 | 'No line or cell magic with name `%s` found.' % target |
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161 | 161 | ) |
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162 | 162 | args.line = bool(m_line) |
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163 | 163 | args.cell = bool(m_cell) |
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164 | 164 | |
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165 | 165 | params_str = "" if params is None else " " + params |
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166 | 166 | |
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167 | 167 | if args.line: |
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168 | 168 | mman.register_alias(name, target, 'line', params) |
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169 | 169 | print('Created `%s%s` as an alias for `%s%s%s`.' % ( |
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170 | 170 | magic_escapes['line'], name, |
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171 | 171 | magic_escapes['line'], target, params_str)) |
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172 | 172 | |
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173 | 173 | if args.cell: |
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174 | 174 | mman.register_alias(name, target, 'cell', params) |
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175 | 175 | print('Created `%s%s` as an alias for `%s%s%s`.' % ( |
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176 | 176 | magic_escapes['cell'], name, |
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177 | 177 | magic_escapes['cell'], target, params_str)) |
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178 | 178 | |
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179 | 179 | @line_magic |
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180 | 180 | def lsmagic(self, parameter_s=''): |
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181 | 181 | """List currently available magic functions.""" |
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182 | 182 | return MagicsDisplay(self.shell.magics_manager, ignore=[self.pip]) |
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183 | 183 | |
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184 | 184 | def _magic_docs(self, brief=False, rest=False): |
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185 | 185 | """Return docstrings from magic functions.""" |
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186 | 186 | mman = self.shell.magics_manager |
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187 | 187 | docs = mman.lsmagic_docs(brief, missing='No documentation') |
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188 | 188 | |
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189 | 189 | if rest: |
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190 | 190 | format_string = '**%s%s**::\n\n%s\n\n' |
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191 | 191 | else: |
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192 | 192 | format_string = '%s%s:\n%s\n' |
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193 | 193 | |
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194 | 194 | return ''.join( |
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195 | 195 | [format_string % (magic_escapes['line'], fname, |
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196 | 196 | indent(dedent(fndoc))) |
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197 | 197 | for fname, fndoc in sorted(docs['line'].items())] |
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198 | 198 | + |
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199 | 199 | [format_string % (magic_escapes['cell'], fname, |
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200 | 200 | indent(dedent(fndoc))) |
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201 | 201 | for fname, fndoc in sorted(docs['cell'].items())] |
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202 | 202 | ) |
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203 | 203 | |
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204 | 204 | @line_magic |
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205 | 205 | def magic(self, parameter_s=''): |
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206 | 206 | """Print information about the magic function system. |
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207 | 207 | |
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208 | 208 | Supported formats: -latex, -brief, -rest |
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209 | 209 | """ |
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210 | 210 | |
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211 | 211 | mode = '' |
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212 | 212 | try: |
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213 | 213 | mode = parameter_s.split()[0][1:] |
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214 | 214 | except IndexError: |
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215 | 215 | pass |
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216 | 216 | |
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217 | 217 | brief = (mode == 'brief') |
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218 | 218 | rest = (mode == 'rest') |
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219 | 219 | magic_docs = self._magic_docs(brief, rest) |
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220 | 220 | |
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221 | 221 | if mode == 'latex': |
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222 | 222 | print(self.format_latex(magic_docs)) |
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223 | 223 | return |
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224 | 224 | else: |
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225 | 225 | magic_docs = format_screen(magic_docs) |
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226 | 226 | |
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227 | 227 | out = [""" |
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228 | 228 | IPython's 'magic' functions |
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229 | 229 | =========================== |
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230 | 230 | |
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231 | 231 | The magic function system provides a series of functions which allow you to |
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232 | 232 | control the behavior of IPython itself, plus a lot of system-type |
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233 | 233 | features. There are two kinds of magics, line-oriented and cell-oriented. |
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234 | 234 | |
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235 | 235 | Line magics are prefixed with the % character and work much like OS |
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236 | 236 | command-line calls: they get as an argument the rest of the line, where |
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237 | 237 | arguments are passed without parentheses or quotes. For example, this will |
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238 | 238 | time the given statement:: |
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239 | 239 | |
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240 | 240 | %timeit range(1000) |
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241 | 241 | |
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242 | 242 | Cell magics are prefixed with a double %%, and they are functions that get as |
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243 | 243 | an argument not only the rest of the line, but also the lines below it in a |
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244 | 244 | separate argument. These magics are called with two arguments: the rest of the |
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245 | 245 | call line and the body of the cell, consisting of the lines below the first. |
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246 | 246 | For example:: |
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247 | 247 | |
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248 | 248 | %%timeit x = numpy.random.randn((100, 100)) |
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249 | 249 | numpy.linalg.svd(x) |
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250 | 250 | |
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251 | 251 | will time the execution of the numpy svd routine, running the assignment of x |
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252 | 252 | as part of the setup phase, which is not timed. |
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253 | 253 | |
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254 | 254 | In a line-oriented client (the terminal or Qt console IPython), starting a new |
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255 | 255 | input with %% will automatically enter cell mode, and IPython will continue |
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256 | 256 | reading input until a blank line is given. In the notebook, simply type the |
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257 | 257 | whole cell as one entity, but keep in mind that the %% escape can only be at |
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258 | 258 | the very start of the cell. |
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259 | 259 | |
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260 | 260 | NOTE: If you have 'automagic' enabled (via the command line option or with the |
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261 | 261 | %automagic function), you don't need to type in the % explicitly for line |
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262 | 262 | magics; cell magics always require an explicit '%%' escape. By default, |
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263 | 263 | IPython ships with automagic on, so you should only rarely need the % escape. |
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264 | 264 | |
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265 | 265 | Example: typing '%cd mydir' (without the quotes) changes your working directory |
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266 | 266 | to 'mydir', if it exists. |
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267 | 267 | |
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268 | 268 | For a list of the available magic functions, use %lsmagic. For a description |
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269 | 269 | of any of them, type %magic_name?, e.g. '%cd?'. |
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270 | 270 | |
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271 | 271 | Currently the magic system has the following functions:""", |
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272 | 272 | magic_docs, |
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273 | 273 | "Summary of magic functions (from %slsmagic):" % magic_escapes['line'], |
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274 | 274 | str(self.lsmagic()), |
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275 | 275 | ] |
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276 | 276 | page.page('\n'.join(out)) |
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277 | 277 | |
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278 | 278 | |
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279 | 279 | @line_magic |
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280 | 280 | def page(self, parameter_s=''): |
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281 | 281 | """Pretty print the object and display it through a pager. |
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282 | 282 | |
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283 | 283 | %page [options] OBJECT |
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284 | 284 | |
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285 | 285 | If no object is given, use _ (last output). |
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286 | 286 | |
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287 | 287 | Options: |
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288 | 288 | |
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289 | 289 | -r: page str(object), don't pretty-print it.""" |
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290 | 290 | |
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291 | 291 | # After a function contributed by Olivier Aubert, slightly modified. |
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292 | 292 | |
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293 | 293 | # Process options/args |
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294 | 294 | opts, args = self.parse_options(parameter_s, 'r') |
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295 | 295 | raw = 'r' in opts |
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296 | 296 | |
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297 | 297 | oname = args and args or '_' |
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298 | 298 | info = self.shell._ofind(oname) |
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299 | 299 | if info['found']: |
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300 | 300 | txt = (raw and str or pformat)( info['obj'] ) |
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301 | 301 | page.page(txt) |
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302 | 302 | else: |
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303 | 303 | print('Object `%s` not found' % oname) |
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304 | 304 | |
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305 | 305 | @line_magic |
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306 | 306 | def pprint(self, parameter_s=''): |
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307 | 307 | """Toggle pretty printing on/off.""" |
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308 | 308 | ptformatter = self.shell.display_formatter.formatters['text/plain'] |
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309 | 309 | ptformatter.pprint = bool(1 - ptformatter.pprint) |
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310 | 310 | print('Pretty printing has been turned', |
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311 | 311 | ['OFF','ON'][ptformatter.pprint]) |
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312 | 312 | |
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313 | 313 | @line_magic |
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314 | 314 | def colors(self, parameter_s=''): |
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315 | 315 | """Switch color scheme for prompts, info system and exception handlers. |
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316 | 316 | |
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317 | 317 | Currently implemented schemes: NoColor, Linux, LightBG. |
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318 | 318 | |
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319 | 319 | Color scheme names are not case-sensitive. |
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320 | 320 | |
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321 | 321 | Examples |
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322 | 322 | -------- |
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323 | 323 | To get a plain black and white terminal:: |
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324 | 324 | |
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325 | 325 | %colors nocolor |
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326 | 326 | """ |
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327 | 327 | def color_switch_err(name): |
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328 | 328 | warn('Error changing %s color schemes.\n%s' % |
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329 | 329 | (name, sys.exc_info()[1]), stacklevel=2) |
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330 | 330 | |
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331 | 331 | |
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332 | 332 | new_scheme = parameter_s.strip() |
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333 | 333 | if not new_scheme: |
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334 | 334 | raise UsageError( |
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335 | 335 | "%colors: you must specify a color scheme. See '%colors?'") |
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336 | 336 | # local shortcut |
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337 | 337 | shell = self.shell |
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338 | 338 | |
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339 | 339 | # Set shell colour scheme |
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340 | 340 | try: |
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341 | 341 | shell.colors = new_scheme |
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342 | 342 | shell.refresh_style() |
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343 | 343 | except: |
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344 | 344 | color_switch_err('shell') |
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345 | 345 | |
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346 | 346 | # Set exception colors |
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347 | 347 | try: |
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348 | 348 | shell.InteractiveTB.set_colors(scheme = new_scheme) |
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349 | 349 | shell.SyntaxTB.set_colors(scheme = new_scheme) |
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350 | 350 | except: |
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351 | 351 | color_switch_err('exception') |
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352 | 352 | |
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353 | 353 | # Set info (for 'object?') colors |
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354 | 354 | if shell.color_info: |
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355 | 355 | try: |
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356 | 356 | shell.inspector.set_active_scheme(new_scheme) |
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357 | 357 | except: |
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358 | 358 | color_switch_err('object inspector') |
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359 | 359 | else: |
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360 | 360 | shell.inspector.set_active_scheme('NoColor') |
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361 | 361 | |
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362 | 362 | @line_magic |
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363 | 363 | def xmode(self, parameter_s=''): |
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364 | 364 | """Switch modes for the exception handlers. |
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365 | 365 | |
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366 |
Valid modes: Plain, Context |
|
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366 | Valid modes: Plain, Context, Verbose, and Minimal. | |
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367 | 367 | |
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368 | 368 | If called without arguments, acts as a toggle.""" |
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369 | 369 | |
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370 | 370 | def xmode_switch_err(name): |
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371 | 371 | warn('Error changing %s exception modes.\n%s' % |
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372 | 372 | (name,sys.exc_info()[1])) |
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373 | 373 | |
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374 | 374 | shell = self.shell |
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375 | 375 | new_mode = parameter_s.strip().capitalize() |
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376 | 376 | try: |
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377 | 377 | shell.InteractiveTB.set_mode(mode=new_mode) |
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378 | 378 | print('Exception reporting mode:',shell.InteractiveTB.mode) |
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379 | 379 | except: |
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380 | 380 | xmode_switch_err('user') |
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381 | 381 | |
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382 | 382 | |
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383 | 383 | |
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384 | 384 | @line_magic |
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385 | 385 | def pip(self, args=''): |
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386 | 386 | """ |
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387 | 387 | Intercept usage of ``pip`` in IPython and direct user to run command outside of IPython. |
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388 | 388 | """ |
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389 | 389 | print(textwrap.dedent(''' |
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390 | 390 | The following command must be run outside of the IPython shell: |
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391 | 391 | |
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392 | 392 | $ pip {args} |
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393 | 393 | |
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394 | 394 | The Python package manager (pip) can only be used from outside of IPython. |
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395 | 395 | Please reissue the `pip` command in a separate terminal or command prompt. |
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396 | 396 | |
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397 | 397 | See the Python documentation for more information on how to install packages: |
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398 | 398 | |
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399 | 399 | https://docs.python.org/3/installing/'''.format(args=args))) |
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400 | 400 | |
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401 | 401 | @line_magic |
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402 | 402 | def quickref(self, arg): |
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403 | 403 | """ Show a quick reference sheet """ |
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404 | 404 | from IPython.core.usage import quick_reference |
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405 | 405 | qr = quick_reference + self._magic_docs(brief=True) |
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406 | 406 | page.page(qr) |
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407 | 407 | |
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408 | 408 | @line_magic |
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409 | 409 | def doctest_mode(self, parameter_s=''): |
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410 | 410 | """Toggle doctest mode on and off. |
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411 | 411 | |
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412 | 412 | This mode is intended to make IPython behave as much as possible like a |
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413 | 413 | plain Python shell, from the perspective of how its prompts, exceptions |
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414 | 414 | and output look. This makes it easy to copy and paste parts of a |
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415 | 415 | session into doctests. It does so by: |
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416 | 416 | |
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417 | 417 | - Changing the prompts to the classic ``>>>`` ones. |
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418 | 418 | - Changing the exception reporting mode to 'Plain'. |
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419 | 419 | - Disabling pretty-printing of output. |
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420 | 420 | |
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421 | 421 | Note that IPython also supports the pasting of code snippets that have |
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422 | 422 | leading '>>>' and '...' prompts in them. This means that you can paste |
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423 | 423 | doctests from files or docstrings (even if they have leading |
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424 | 424 | whitespace), and the code will execute correctly. You can then use |
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425 | 425 | '%history -t' to see the translated history; this will give you the |
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426 | 426 | input after removal of all the leading prompts and whitespace, which |
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427 | 427 | can be pasted back into an editor. |
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428 | 428 | |
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429 | 429 | With these features, you can switch into this mode easily whenever you |
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430 | 430 | need to do testing and changes to doctests, without having to leave |
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431 | 431 | your existing IPython session. |
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432 | 432 | """ |
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433 | 433 | |
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434 | 434 | # Shorthands |
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435 | 435 | shell = self.shell |
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436 | 436 | meta = shell.meta |
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437 | 437 | disp_formatter = self.shell.display_formatter |
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438 | 438 | ptformatter = disp_formatter.formatters['text/plain'] |
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439 | 439 | # dstore is a data store kept in the instance metadata bag to track any |
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440 | 440 | # changes we make, so we can undo them later. |
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441 | 441 | dstore = meta.setdefault('doctest_mode',Struct()) |
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442 | 442 | save_dstore = dstore.setdefault |
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443 | 443 | |
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444 | 444 | # save a few values we'll need to recover later |
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445 | 445 | mode = save_dstore('mode',False) |
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446 | 446 | save_dstore('rc_pprint',ptformatter.pprint) |
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447 | 447 | save_dstore('xmode',shell.InteractiveTB.mode) |
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448 | 448 | save_dstore('rc_separate_out',shell.separate_out) |
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449 | 449 | save_dstore('rc_separate_out2',shell.separate_out2) |
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450 | 450 | save_dstore('rc_separate_in',shell.separate_in) |
|
451 | 451 | save_dstore('rc_active_types',disp_formatter.active_types) |
|
452 | 452 | |
|
453 | 453 | if not mode: |
|
454 | 454 | # turn on |
|
455 | 455 | |
|
456 | 456 | # Prompt separators like plain python |
|
457 | 457 | shell.separate_in = '' |
|
458 | 458 | shell.separate_out = '' |
|
459 | 459 | shell.separate_out2 = '' |
|
460 | 460 | |
|
461 | 461 | |
|
462 | 462 | ptformatter.pprint = False |
|
463 | 463 | disp_formatter.active_types = ['text/plain'] |
|
464 | 464 | |
|
465 | 465 | shell.magic('xmode Plain') |
|
466 | 466 | else: |
|
467 | 467 | # turn off |
|
468 | 468 | shell.separate_in = dstore.rc_separate_in |
|
469 | 469 | |
|
470 | 470 | shell.separate_out = dstore.rc_separate_out |
|
471 | 471 | shell.separate_out2 = dstore.rc_separate_out2 |
|
472 | 472 | |
|
473 | 473 | ptformatter.pprint = dstore.rc_pprint |
|
474 | 474 | disp_formatter.active_types = dstore.rc_active_types |
|
475 | 475 | |
|
476 | 476 | shell.magic('xmode ' + dstore.xmode) |
|
477 | 477 | |
|
478 | 478 | # mode here is the state before we switch; switch_doctest_mode takes |
|
479 | 479 | # the mode we're switching to. |
|
480 | 480 | shell.switch_doctest_mode(not mode) |
|
481 | 481 | |
|
482 | 482 | # Store new mode and inform |
|
483 | 483 | dstore.mode = bool(not mode) |
|
484 | 484 | mode_label = ['OFF','ON'][dstore.mode] |
|
485 | 485 | print('Doctest mode is:', mode_label) |
|
486 | 486 | |
|
487 | 487 | @line_magic |
|
488 | 488 | def gui(self, parameter_s=''): |
|
489 | 489 | """Enable or disable IPython GUI event loop integration. |
|
490 | 490 | |
|
491 | 491 | %gui [GUINAME] |
|
492 | 492 | |
|
493 | 493 | This magic replaces IPython's threaded shells that were activated |
|
494 | 494 | using the (pylab/wthread/etc.) command line flags. GUI toolkits |
|
495 | 495 | can now be enabled at runtime and keyboard |
|
496 | 496 | interrupts should work without any problems. The following toolkits |
|
497 | 497 | are supported: wxPython, PyQt4, PyGTK, Tk and Cocoa (OSX):: |
|
498 | 498 | |
|
499 | 499 | %gui wx # enable wxPython event loop integration |
|
500 | 500 | %gui qt4|qt # enable PyQt4 event loop integration |
|
501 | 501 | %gui qt5 # enable PyQt5 event loop integration |
|
502 | 502 | %gui gtk # enable PyGTK event loop integration |
|
503 | 503 | %gui gtk3 # enable Gtk3 event loop integration |
|
504 | 504 | %gui tk # enable Tk event loop integration |
|
505 | 505 | %gui osx # enable Cocoa event loop integration |
|
506 | 506 | # (requires %matplotlib 1.1) |
|
507 | 507 | %gui # disable all event loop integration |
|
508 | 508 | |
|
509 | 509 | WARNING: after any of these has been called you can simply create |
|
510 | 510 | an application object, but DO NOT start the event loop yourself, as |
|
511 | 511 | we have already handled that. |
|
512 | 512 | """ |
|
513 | 513 | opts, arg = self.parse_options(parameter_s, '') |
|
514 | 514 | if arg=='': arg = None |
|
515 | 515 | try: |
|
516 | 516 | return self.shell.enable_gui(arg) |
|
517 | 517 | except Exception as e: |
|
518 | 518 | # print simple error message, rather than traceback if we can't |
|
519 | 519 | # hook up the GUI |
|
520 | 520 | error(str(e)) |
|
521 | 521 | |
|
522 | 522 | @skip_doctest |
|
523 | 523 | @line_magic |
|
524 | 524 | def precision(self, s=''): |
|
525 | 525 | """Set floating point precision for pretty printing. |
|
526 | 526 | |
|
527 | 527 | Can set either integer precision or a format string. |
|
528 | 528 | |
|
529 | 529 | If numpy has been imported and precision is an int, |
|
530 | 530 | numpy display precision will also be set, via ``numpy.set_printoptions``. |
|
531 | 531 | |
|
532 | 532 | If no argument is given, defaults will be restored. |
|
533 | 533 | |
|
534 | 534 | Examples |
|
535 | 535 | -------- |
|
536 | 536 | :: |
|
537 | 537 | |
|
538 | 538 | In [1]: from math import pi |
|
539 | 539 | |
|
540 | 540 | In [2]: %precision 3 |
|
541 | 541 | Out[2]: u'%.3f' |
|
542 | 542 | |
|
543 | 543 | In [3]: pi |
|
544 | 544 | Out[3]: 3.142 |
|
545 | 545 | |
|
546 | 546 | In [4]: %precision %i |
|
547 | 547 | Out[4]: u'%i' |
|
548 | 548 | |
|
549 | 549 | In [5]: pi |
|
550 | 550 | Out[5]: 3 |
|
551 | 551 | |
|
552 | 552 | In [6]: %precision %e |
|
553 | 553 | Out[6]: u'%e' |
|
554 | 554 | |
|
555 | 555 | In [7]: pi**10 |
|
556 | 556 | Out[7]: 9.364805e+04 |
|
557 | 557 | |
|
558 | 558 | In [8]: %precision |
|
559 | 559 | Out[8]: u'%r' |
|
560 | 560 | |
|
561 | 561 | In [9]: pi**10 |
|
562 | 562 | Out[9]: 93648.047476082982 |
|
563 | 563 | """ |
|
564 | 564 | ptformatter = self.shell.display_formatter.formatters['text/plain'] |
|
565 | 565 | ptformatter.float_precision = s |
|
566 | 566 | return ptformatter.float_format |
|
567 | 567 | |
|
568 | 568 | @magic_arguments.magic_arguments() |
|
569 | 569 | @magic_arguments.argument( |
|
570 | 570 | '-e', '--export', action='store_true', default=False, |
|
571 | 571 | help=argparse.SUPPRESS |
|
572 | 572 | ) |
|
573 | 573 | @magic_arguments.argument( |
|
574 | 574 | 'filename', type=str, |
|
575 | 575 | help='Notebook name or filename' |
|
576 | 576 | ) |
|
577 | 577 | @line_magic |
|
578 | 578 | def notebook(self, s): |
|
579 | 579 | """Export and convert IPython notebooks. |
|
580 | 580 | |
|
581 | 581 | This function can export the current IPython history to a notebook file. |
|
582 | 582 | For example, to export the history to "foo.ipynb" do "%notebook foo.ipynb". |
|
583 | 583 | |
|
584 | 584 | The -e or --export flag is deprecated in IPython 5.2, and will be |
|
585 | 585 | removed in the future. |
|
586 | 586 | """ |
|
587 | 587 | args = magic_arguments.parse_argstring(self.notebook, s) |
|
588 | 588 | |
|
589 | 589 | from nbformat import write, v4 |
|
590 | 590 | |
|
591 | 591 | cells = [] |
|
592 | 592 | hist = list(self.shell.history_manager.get_range()) |
|
593 | 593 | if(len(hist)<=1): |
|
594 | 594 | raise ValueError('History is empty, cannot export') |
|
595 | 595 | for session, execution_count, source in hist[:-1]: |
|
596 | 596 | cells.append(v4.new_code_cell( |
|
597 | 597 | execution_count=execution_count, |
|
598 | 598 | source=source |
|
599 | 599 | )) |
|
600 | 600 | nb = v4.new_notebook(cells=cells) |
|
601 | 601 | with io.open(args.filename, 'w', encoding='utf-8') as f: |
|
602 | 602 | write(nb, f, version=4) |
|
603 | 603 | |
|
604 | 604 | @magics_class |
|
605 | 605 | class AsyncMagics(BasicMagics): |
|
606 | 606 | |
|
607 | 607 | @line_magic |
|
608 | 608 | def autoawait(self, parameter_s): |
|
609 | 609 | """ |
|
610 | 610 | Allow to change the status of the autoawait option. |
|
611 | 611 | |
|
612 | 612 | This allow you to set a specific asynchronous code runner. |
|
613 | 613 | |
|
614 | 614 | If no value is passed, print the currently used asynchronous integration |
|
615 | 615 | and whether it is activated. |
|
616 | 616 | |
|
617 | 617 | It can take a number of value evaluated in the following order: |
|
618 | 618 | |
|
619 | 619 | - False/false/off deactivate autoawait integration |
|
620 | 620 | - True/true/on activate autoawait integration using configured default |
|
621 | 621 | loop |
|
622 | 622 | - asyncio/curio/trio activate autoawait integration and use integration |
|
623 | 623 | with said library. |
|
624 | 624 | |
|
625 | 625 | - `sync` turn on the pseudo-sync integration (mostly used for |
|
626 | 626 | `IPython.embed()` which does not run IPython with a real eventloop and |
|
627 | 627 | deactivate running asynchronous code. Turning on Asynchronous code with |
|
628 | 628 | the pseudo sync loop is undefined behavior and may lead IPython to crash. |
|
629 | 629 | |
|
630 | 630 | If the passed parameter does not match any of the above and is a python |
|
631 | 631 | identifier, get said object from user namespace and set it as the |
|
632 | 632 | runner, and activate autoawait. |
|
633 | 633 | |
|
634 | 634 | If the object is a fully qualified object name, attempt to import it and |
|
635 | 635 | set it as the runner, and activate autoawait. |
|
636 | 636 | |
|
637 | 637 | |
|
638 | 638 | The exact behavior of autoawait is experimental and subject to change |
|
639 | 639 | across version of IPython and Python. |
|
640 | 640 | """ |
|
641 | 641 | |
|
642 | 642 | param = parameter_s.strip() |
|
643 | 643 | d = {True: "on", False: "off"} |
|
644 | 644 | |
|
645 | 645 | if not param: |
|
646 | 646 | print("IPython autoawait is `{}`, and set to use `{}`".format( |
|
647 | 647 | d[self.shell.autoawait], |
|
648 | 648 | self.shell.loop_runner |
|
649 | 649 | )) |
|
650 | 650 | return None |
|
651 | 651 | |
|
652 | 652 | if param.lower() in ('false', 'off'): |
|
653 | 653 | self.shell.autoawait = False |
|
654 | 654 | return None |
|
655 | 655 | if param.lower() in ('true', 'on'): |
|
656 | 656 | self.shell.autoawait = True |
|
657 | 657 | return None |
|
658 | 658 | |
|
659 | 659 | if param in self.shell.loop_runner_map: |
|
660 | 660 | self.shell.loop_runner, self.shell.autoawait = self.shell.loop_runner_map[param] |
|
661 | 661 | return None |
|
662 | 662 | |
|
663 | 663 | if param in self.shell.user_ns : |
|
664 | 664 | self.shell.loop_runner = self.shell.user_ns[param] |
|
665 | 665 | self.shell.autoawait = True |
|
666 | 666 | return None |
|
667 | 667 | |
|
668 | 668 | runner = import_item(param) |
|
669 | 669 | |
|
670 | 670 | self.shell.loop_runner = runner |
|
671 | 671 | self.shell.autoawait = True |
@@ -1,400 +1,403 b'' | |||
|
1 | 1 | # encoding: utf-8 |
|
2 | 2 | """Tests for IPython.core.ultratb |
|
3 | 3 | """ |
|
4 | 4 | import io |
|
5 | 5 | import logging |
|
6 | 6 | import sys |
|
7 | 7 | import os.path |
|
8 | 8 | from textwrap import dedent |
|
9 | 9 | import traceback |
|
10 | 10 | import unittest |
|
11 | 11 | from unittest import mock |
|
12 | 12 | |
|
13 | 13 | from ..ultratb import ColorTB, VerboseTB, find_recursion |
|
14 | 14 | |
|
15 | 15 | |
|
16 | 16 | from IPython.testing import tools as tt |
|
17 | 17 | from IPython.testing.decorators import onlyif_unicode_paths |
|
18 | 18 | from IPython.utils.syspathcontext import prepended_to_syspath |
|
19 | 19 | from IPython.utils.tempdir import TemporaryDirectory |
|
20 | 20 | |
|
21 | 21 | ip = get_ipython() |
|
22 | 22 | |
|
23 | 23 | file_1 = """1 |
|
24 | 24 | 2 |
|
25 | 25 | 3 |
|
26 | 26 | def f(): |
|
27 | 27 | 1/0 |
|
28 | 28 | """ |
|
29 | 29 | |
|
30 | 30 | file_2 = """def f(): |
|
31 | 31 | 1/0 |
|
32 | 32 | """ |
|
33 | 33 | |
|
34 | 34 | class ChangedPyFileTest(unittest.TestCase): |
|
35 | 35 | def test_changing_py_file(self): |
|
36 | 36 | """Traceback produced if the line where the error occurred is missing? |
|
37 | 37 | |
|
38 | 38 | https://github.com/ipython/ipython/issues/1456 |
|
39 | 39 | """ |
|
40 | 40 | with TemporaryDirectory() as td: |
|
41 | 41 | fname = os.path.join(td, "foo.py") |
|
42 | 42 | with open(fname, "w") as f: |
|
43 | 43 | f.write(file_1) |
|
44 | 44 | |
|
45 | 45 | with prepended_to_syspath(td): |
|
46 | 46 | ip.run_cell("import foo") |
|
47 | 47 | |
|
48 | 48 | with tt.AssertPrints("ZeroDivisionError"): |
|
49 | 49 | ip.run_cell("foo.f()") |
|
50 | 50 | |
|
51 | 51 | # Make the file shorter, so the line of the error is missing. |
|
52 | 52 | with open(fname, "w") as f: |
|
53 | 53 | f.write(file_2) |
|
54 | 54 | |
|
55 | 55 | # For some reason, this was failing on the *second* call after |
|
56 | 56 | # changing the file, so we call f() twice. |
|
57 | 57 | with tt.AssertNotPrints("Internal Python error", channel='stderr'): |
|
58 | 58 | with tt.AssertPrints("ZeroDivisionError"): |
|
59 | 59 | ip.run_cell("foo.f()") |
|
60 | 60 | with tt.AssertPrints("ZeroDivisionError"): |
|
61 | 61 | ip.run_cell("foo.f()") |
|
62 | 62 | |
|
63 | 63 | iso_8859_5_file = u'''# coding: iso-8859-5 |
|
64 | 64 | |
|
65 | 65 | def fail(): |
|
66 | 66 | """дбИЖ""" |
|
67 | 67 | 1/0 # дбИЖ |
|
68 | 68 | ''' |
|
69 | 69 | |
|
70 | 70 | class NonAsciiTest(unittest.TestCase): |
|
71 | 71 | @onlyif_unicode_paths |
|
72 | 72 | def test_nonascii_path(self): |
|
73 | 73 | # Non-ascii directory name as well. |
|
74 | 74 | with TemporaryDirectory(suffix=u'é') as td: |
|
75 | 75 | fname = os.path.join(td, u"fooé.py") |
|
76 | 76 | with open(fname, "w") as f: |
|
77 | 77 | f.write(file_1) |
|
78 | 78 | |
|
79 | 79 | with prepended_to_syspath(td): |
|
80 | 80 | ip.run_cell("import foo") |
|
81 | 81 | |
|
82 | 82 | with tt.AssertPrints("ZeroDivisionError"): |
|
83 | 83 | ip.run_cell("foo.f()") |
|
84 | 84 | |
|
85 | 85 | def test_iso8859_5(self): |
|
86 | 86 | with TemporaryDirectory() as td: |
|
87 | 87 | fname = os.path.join(td, 'dfghjkl.py') |
|
88 | 88 | |
|
89 | 89 | with io.open(fname, 'w', encoding='iso-8859-5') as f: |
|
90 | 90 | f.write(iso_8859_5_file) |
|
91 | 91 | |
|
92 | 92 | with prepended_to_syspath(td): |
|
93 | 93 | ip.run_cell("from dfghjkl import fail") |
|
94 | 94 | |
|
95 | 95 | with tt.AssertPrints("ZeroDivisionError"): |
|
96 | 96 | with tt.AssertPrints(u'дбИЖ', suppress=False): |
|
97 | 97 | ip.run_cell('fail()') |
|
98 | 98 | |
|
99 | 99 | def test_nonascii_msg(self): |
|
100 | 100 | cell = u"raise Exception('é')" |
|
101 | 101 | expected = u"Exception('é')" |
|
102 | 102 | ip.run_cell("%xmode plain") |
|
103 | 103 | with tt.AssertPrints(expected): |
|
104 | 104 | ip.run_cell(cell) |
|
105 | 105 | |
|
106 | 106 | ip.run_cell("%xmode verbose") |
|
107 | 107 | with tt.AssertPrints(expected): |
|
108 | 108 | ip.run_cell(cell) |
|
109 | 109 | |
|
110 | 110 | ip.run_cell("%xmode context") |
|
111 | 111 | with tt.AssertPrints(expected): |
|
112 | 112 | ip.run_cell(cell) |
|
113 | 113 | |
|
114 | ip.run_cell("%xmode minimal") | |
|
115 | with tt.AssertPrints(u"Exception: é"): | |
|
116 | ip.run_cell(cell) | |
|
114 | 117 | |
|
115 | 118 | class NestedGenExprTestCase(unittest.TestCase): |
|
116 | 119 | """ |
|
117 | 120 | Regression test for the following issues: |
|
118 | 121 | https://github.com/ipython/ipython/issues/8293 |
|
119 | 122 | https://github.com/ipython/ipython/issues/8205 |
|
120 | 123 | """ |
|
121 | 124 | def test_nested_genexpr(self): |
|
122 | 125 | code = dedent( |
|
123 | 126 | """\ |
|
124 | 127 | class SpecificException(Exception): |
|
125 | 128 | pass |
|
126 | 129 | |
|
127 | 130 | def foo(x): |
|
128 | 131 | raise SpecificException("Success!") |
|
129 | 132 | |
|
130 | 133 | sum(sum(foo(x) for _ in [0]) for x in [0]) |
|
131 | 134 | """ |
|
132 | 135 | ) |
|
133 | 136 | with tt.AssertPrints('SpecificException: Success!', suppress=False): |
|
134 | 137 | ip.run_cell(code) |
|
135 | 138 | |
|
136 | 139 | |
|
137 | 140 | indentationerror_file = """if True: |
|
138 | 141 | zoon() |
|
139 | 142 | """ |
|
140 | 143 | |
|
141 | 144 | class IndentationErrorTest(unittest.TestCase): |
|
142 | 145 | def test_indentationerror_shows_line(self): |
|
143 | 146 | # See issue gh-2398 |
|
144 | 147 | with tt.AssertPrints("IndentationError"): |
|
145 | 148 | with tt.AssertPrints("zoon()", suppress=False): |
|
146 | 149 | ip.run_cell(indentationerror_file) |
|
147 | 150 | |
|
148 | 151 | with TemporaryDirectory() as td: |
|
149 | 152 | fname = os.path.join(td, "foo.py") |
|
150 | 153 | with open(fname, "w") as f: |
|
151 | 154 | f.write(indentationerror_file) |
|
152 | 155 | |
|
153 | 156 | with tt.AssertPrints("IndentationError"): |
|
154 | 157 | with tt.AssertPrints("zoon()", suppress=False): |
|
155 | 158 | ip.magic('run %s' % fname) |
|
156 | 159 | |
|
157 | 160 | se_file_1 = """1 |
|
158 | 161 | 2 |
|
159 | 162 | 7/ |
|
160 | 163 | """ |
|
161 | 164 | |
|
162 | 165 | se_file_2 = """7/ |
|
163 | 166 | """ |
|
164 | 167 | |
|
165 | 168 | class SyntaxErrorTest(unittest.TestCase): |
|
166 | 169 | def test_syntaxerror_without_lineno(self): |
|
167 | 170 | with tt.AssertNotPrints("TypeError"): |
|
168 | 171 | with tt.AssertPrints("line unknown"): |
|
169 | 172 | ip.run_cell("raise SyntaxError()") |
|
170 | 173 | |
|
171 | 174 | def test_syntaxerror_no_stacktrace_at_compile_time(self): |
|
172 | 175 | syntax_error_at_compile_time = """ |
|
173 | 176 | def foo(): |
|
174 | 177 | .. |
|
175 | 178 | """ |
|
176 | 179 | with tt.AssertPrints("SyntaxError"): |
|
177 | 180 | ip.run_cell(syntax_error_at_compile_time) |
|
178 | 181 | |
|
179 | 182 | with tt.AssertNotPrints("foo()"): |
|
180 | 183 | ip.run_cell(syntax_error_at_compile_time) |
|
181 | 184 | |
|
182 | 185 | def test_syntaxerror_stacktrace_when_running_compiled_code(self): |
|
183 | 186 | syntax_error_at_runtime = """ |
|
184 | 187 | def foo(): |
|
185 | 188 | eval("..") |
|
186 | 189 | |
|
187 | 190 | def bar(): |
|
188 | 191 | foo() |
|
189 | 192 | |
|
190 | 193 | bar() |
|
191 | 194 | """ |
|
192 | 195 | with tt.AssertPrints("SyntaxError"): |
|
193 | 196 | ip.run_cell(syntax_error_at_runtime) |
|
194 | 197 | # Assert syntax error during runtime generate stacktrace |
|
195 | 198 | with tt.AssertPrints(["foo()", "bar()"]): |
|
196 | 199 | ip.run_cell(syntax_error_at_runtime) |
|
197 | 200 | |
|
198 | 201 | def test_changing_py_file(self): |
|
199 | 202 | with TemporaryDirectory() as td: |
|
200 | 203 | fname = os.path.join(td, "foo.py") |
|
201 | 204 | with open(fname, 'w') as f: |
|
202 | 205 | f.write(se_file_1) |
|
203 | 206 | |
|
204 | 207 | with tt.AssertPrints(["7/", "SyntaxError"]): |
|
205 | 208 | ip.magic("run " + fname) |
|
206 | 209 | |
|
207 | 210 | # Modify the file |
|
208 | 211 | with open(fname, 'w') as f: |
|
209 | 212 | f.write(se_file_2) |
|
210 | 213 | |
|
211 | 214 | # The SyntaxError should point to the correct line |
|
212 | 215 | with tt.AssertPrints(["7/", "SyntaxError"]): |
|
213 | 216 | ip.magic("run " + fname) |
|
214 | 217 | |
|
215 | 218 | def test_non_syntaxerror(self): |
|
216 | 219 | # SyntaxTB may be called with an error other than a SyntaxError |
|
217 | 220 | # See e.g. gh-4361 |
|
218 | 221 | try: |
|
219 | 222 | raise ValueError('QWERTY') |
|
220 | 223 | except ValueError: |
|
221 | 224 | with tt.AssertPrints('QWERTY'): |
|
222 | 225 | ip.showsyntaxerror() |
|
223 | 226 | |
|
224 | 227 | |
|
225 | 228 | class Python3ChainedExceptionsTest(unittest.TestCase): |
|
226 | 229 | DIRECT_CAUSE_ERROR_CODE = """ |
|
227 | 230 | try: |
|
228 | 231 | x = 1 + 2 |
|
229 | 232 | print(not_defined_here) |
|
230 | 233 | except Exception as e: |
|
231 | 234 | x += 55 |
|
232 | 235 | x - 1 |
|
233 | 236 | y = {} |
|
234 | 237 | raise KeyError('uh') from e |
|
235 | 238 | """ |
|
236 | 239 | |
|
237 | 240 | EXCEPTION_DURING_HANDLING_CODE = """ |
|
238 | 241 | try: |
|
239 | 242 | x = 1 + 2 |
|
240 | 243 | print(not_defined_here) |
|
241 | 244 | except Exception as e: |
|
242 | 245 | x += 55 |
|
243 | 246 | x - 1 |
|
244 | 247 | y = {} |
|
245 | 248 | raise KeyError('uh') |
|
246 | 249 | """ |
|
247 | 250 | |
|
248 | 251 | SUPPRESS_CHAINING_CODE = """ |
|
249 | 252 | try: |
|
250 | 253 | 1/0 |
|
251 | 254 | except Exception: |
|
252 | 255 | raise ValueError("Yikes") from None |
|
253 | 256 | """ |
|
254 | 257 | |
|
255 | 258 | def test_direct_cause_error(self): |
|
256 | 259 | with tt.AssertPrints(["KeyError", "NameError", "direct cause"]): |
|
257 | 260 | ip.run_cell(self.DIRECT_CAUSE_ERROR_CODE) |
|
258 | 261 | |
|
259 | 262 | def test_exception_during_handling_error(self): |
|
260 | 263 | with tt.AssertPrints(["KeyError", "NameError", "During handling"]): |
|
261 | 264 | ip.run_cell(self.EXCEPTION_DURING_HANDLING_CODE) |
|
262 | 265 | |
|
263 | 266 | def test_suppress_exception_chaining(self): |
|
264 | 267 | with tt.AssertNotPrints("ZeroDivisionError"), \ |
|
265 | 268 | tt.AssertPrints("ValueError", suppress=False): |
|
266 | 269 | ip.run_cell(self.SUPPRESS_CHAINING_CODE) |
|
267 | 270 | |
|
268 | 271 | |
|
269 | 272 | class RecursionTest(unittest.TestCase): |
|
270 | 273 | DEFINITIONS = """ |
|
271 | 274 | def non_recurs(): |
|
272 | 275 | 1/0 |
|
273 | 276 | |
|
274 | 277 | def r1(): |
|
275 | 278 | r1() |
|
276 | 279 | |
|
277 | 280 | def r3a(): |
|
278 | 281 | r3b() |
|
279 | 282 | |
|
280 | 283 | def r3b(): |
|
281 | 284 | r3c() |
|
282 | 285 | |
|
283 | 286 | def r3c(): |
|
284 | 287 | r3a() |
|
285 | 288 | |
|
286 | 289 | def r3o1(): |
|
287 | 290 | r3a() |
|
288 | 291 | |
|
289 | 292 | def r3o2(): |
|
290 | 293 | r3o1() |
|
291 | 294 | """ |
|
292 | 295 | def setUp(self): |
|
293 | 296 | ip.run_cell(self.DEFINITIONS) |
|
294 | 297 | |
|
295 | 298 | def test_no_recursion(self): |
|
296 | 299 | with tt.AssertNotPrints("frames repeated"): |
|
297 | 300 | ip.run_cell("non_recurs()") |
|
298 | 301 | |
|
299 | 302 | def test_recursion_one_frame(self): |
|
300 | 303 | with tt.AssertPrints("1 frames repeated"): |
|
301 | 304 | ip.run_cell("r1()") |
|
302 | 305 | |
|
303 | 306 | def test_recursion_three_frames(self): |
|
304 | 307 | with tt.AssertPrints("3 frames repeated"): |
|
305 | 308 | ip.run_cell("r3o2()") |
|
306 | 309 | |
|
307 | 310 | def test_find_recursion(self): |
|
308 | 311 | captured = [] |
|
309 | 312 | def capture_exc(*args, **kwargs): |
|
310 | 313 | captured.append(sys.exc_info()) |
|
311 | 314 | with mock.patch.object(ip, 'showtraceback', capture_exc): |
|
312 | 315 | ip.run_cell("r3o2()") |
|
313 | 316 | |
|
314 | 317 | self.assertEqual(len(captured), 1) |
|
315 | 318 | etype, evalue, tb = captured[0] |
|
316 | 319 | self.assertIn("recursion", str(evalue)) |
|
317 | 320 | |
|
318 | 321 | records = ip.InteractiveTB.get_records(tb, 3, ip.InteractiveTB.tb_offset) |
|
319 | 322 | for r in records[:10]: |
|
320 | 323 | print(r[1:4]) |
|
321 | 324 | |
|
322 | 325 | # The outermost frames should be: |
|
323 | 326 | # 0: the 'cell' that was running when the exception came up |
|
324 | 327 | # 1: r3o2() |
|
325 | 328 | # 2: r3o1() |
|
326 | 329 | # 3: r3a() |
|
327 | 330 | # Then repeating r3b, r3c, r3a |
|
328 | 331 | last_unique, repeat_length = find_recursion(etype, evalue, records) |
|
329 | 332 | self.assertEqual(last_unique, 2) |
|
330 | 333 | self.assertEqual(repeat_length, 3) |
|
331 | 334 | |
|
332 | 335 | |
|
333 | 336 | #---------------------------------------------------------------------------- |
|
334 | 337 | |
|
335 | 338 | # module testing (minimal) |
|
336 | 339 | def test_handlers(): |
|
337 | 340 | def spam(c, d_e): |
|
338 | 341 | (d, e) = d_e |
|
339 | 342 | x = c + d |
|
340 | 343 | y = c * d |
|
341 | 344 | foo(x, y) |
|
342 | 345 | |
|
343 | 346 | def foo(a, b, bar=1): |
|
344 | 347 | eggs(a, b + bar) |
|
345 | 348 | |
|
346 | 349 | def eggs(f, g, z=globals()): |
|
347 | 350 | h = f + g |
|
348 | 351 | i = f - g |
|
349 | 352 | return h / i |
|
350 | 353 | |
|
351 | 354 | buff = io.StringIO() |
|
352 | 355 | |
|
353 | 356 | buff.write('') |
|
354 | 357 | buff.write('*** Before ***') |
|
355 | 358 | try: |
|
356 | 359 | buff.write(spam(1, (2, 3))) |
|
357 | 360 | except: |
|
358 | 361 | traceback.print_exc(file=buff) |
|
359 | 362 | |
|
360 | 363 | handler = ColorTB(ostream=buff) |
|
361 | 364 | buff.write('*** ColorTB ***') |
|
362 | 365 | try: |
|
363 | 366 | buff.write(spam(1, (2, 3))) |
|
364 | 367 | except: |
|
365 | 368 | handler(*sys.exc_info()) |
|
366 | 369 | buff.write('') |
|
367 | 370 | |
|
368 | 371 | handler = VerboseTB(ostream=buff) |
|
369 | 372 | buff.write('*** VerboseTB ***') |
|
370 | 373 | try: |
|
371 | 374 | buff.write(spam(1, (2, 3))) |
|
372 | 375 | except: |
|
373 | 376 | handler(*sys.exc_info()) |
|
374 | 377 | buff.write('') |
|
375 | 378 | |
|
376 | 379 | |
|
377 | 380 | class TokenizeFailureTest(unittest.TestCase): |
|
378 | 381 | """Tests related to https://github.com/ipython/ipython/issues/6864.""" |
|
379 | 382 | |
|
380 | 383 | def testLogging(self): |
|
381 | 384 | message = "An unexpected error occurred while tokenizing input" |
|
382 | 385 | cell = 'raise ValueError("""a\nb""")' |
|
383 | 386 | |
|
384 | 387 | stream = io.StringIO() |
|
385 | 388 | handler = logging.StreamHandler(stream) |
|
386 | 389 | logger = logging.getLogger() |
|
387 | 390 | loglevel = logger.level |
|
388 | 391 | logger.addHandler(handler) |
|
389 | 392 | self.addCleanup(lambda: logger.removeHandler(handler)) |
|
390 | 393 | self.addCleanup(lambda: logger.setLevel(loglevel)) |
|
391 | 394 | |
|
392 | 395 | logger.setLevel(logging.INFO) |
|
393 | 396 | with tt.AssertNotPrints(message): |
|
394 | 397 | ip.run_cell(cell) |
|
395 | 398 | self.assertNotIn(message, stream.getvalue()) |
|
396 | 399 | |
|
397 | 400 | logger.setLevel(logging.DEBUG) |
|
398 | 401 | with tt.AssertNotPrints(message): |
|
399 | 402 | ip.run_cell(cell) |
|
400 | 403 | self.assertIn(message, stream.getvalue()) |
@@ -1,1461 +1,1467 b'' | |||
|
1 | 1 | # -*- coding: utf-8 -*- |
|
2 | 2 | """ |
|
3 | 3 | Verbose and colourful traceback formatting. |
|
4 | 4 | |
|
5 | 5 | **ColorTB** |
|
6 | 6 | |
|
7 | 7 | I've always found it a bit hard to visually parse tracebacks in Python. The |
|
8 | 8 | ColorTB class is a solution to that problem. It colors the different parts of a |
|
9 | 9 | traceback in a manner similar to what you would expect from a syntax-highlighting |
|
10 | 10 | text editor. |
|
11 | 11 | |
|
12 | 12 | Installation instructions for ColorTB:: |
|
13 | 13 | |
|
14 | 14 | import sys,ultratb |
|
15 | 15 | sys.excepthook = ultratb.ColorTB() |
|
16 | 16 | |
|
17 | 17 | **VerboseTB** |
|
18 | 18 | |
|
19 | 19 | I've also included a port of Ka-Ping Yee's "cgitb.py" that produces all kinds |
|
20 | 20 | of useful info when a traceback occurs. Ping originally had it spit out HTML |
|
21 | 21 | and intended it for CGI programmers, but why should they have all the fun? I |
|
22 | 22 | altered it to spit out colored text to the terminal. It's a bit overwhelming, |
|
23 | 23 | but kind of neat, and maybe useful for long-running programs that you believe |
|
24 | 24 | are bug-free. If a crash *does* occur in that type of program you want details. |
|
25 | 25 | Give it a shot--you'll love it or you'll hate it. |
|
26 | 26 | |
|
27 | 27 | .. note:: |
|
28 | 28 | |
|
29 | 29 | The Verbose mode prints the variables currently visible where the exception |
|
30 | 30 | happened (shortening their strings if too long). This can potentially be |
|
31 | 31 | very slow, if you happen to have a huge data structure whose string |
|
32 | 32 | representation is complex to compute. Your computer may appear to freeze for |
|
33 | 33 | a while with cpu usage at 100%. If this occurs, you can cancel the traceback |
|
34 | 34 | with Ctrl-C (maybe hitting it more than once). |
|
35 | 35 | |
|
36 | 36 | If you encounter this kind of situation often, you may want to use the |
|
37 | 37 | Verbose_novars mode instead of the regular Verbose, which avoids formatting |
|
38 | 38 | variables (but otherwise includes the information and context given by |
|
39 | 39 | Verbose). |
|
40 | 40 | |
|
41 | 41 | .. note:: |
|
42 | 42 | |
|
43 | 43 | The verbose mode print all variables in the stack, which means it can |
|
44 | 44 | potentially leak sensitive information like access keys, or unencryted |
|
45 | 45 | password. |
|
46 | 46 | |
|
47 | 47 | Installation instructions for VerboseTB:: |
|
48 | 48 | |
|
49 | 49 | import sys,ultratb |
|
50 | 50 | sys.excepthook = ultratb.VerboseTB() |
|
51 | 51 | |
|
52 | 52 | Note: Much of the code in this module was lifted verbatim from the standard |
|
53 | 53 | library module 'traceback.py' and Ka-Ping Yee's 'cgitb.py'. |
|
54 | 54 | |
|
55 | 55 | Color schemes |
|
56 | 56 | ------------- |
|
57 | 57 | |
|
58 | 58 | The colors are defined in the class TBTools through the use of the |
|
59 | 59 | ColorSchemeTable class. Currently the following exist: |
|
60 | 60 | |
|
61 | 61 | - NoColor: allows all of this module to be used in any terminal (the color |
|
62 | 62 | escapes are just dummy blank strings). |
|
63 | 63 | |
|
64 | 64 | - Linux: is meant to look good in a terminal like the Linux console (black |
|
65 | 65 | or very dark background). |
|
66 | 66 | |
|
67 | 67 | - LightBG: similar to Linux but swaps dark/light colors to be more readable |
|
68 | 68 | in light background terminals. |
|
69 | 69 | |
|
70 | 70 | - Neutral: a neutral color scheme that should be readable on both light and |
|
71 | 71 | dark background |
|
72 | 72 | |
|
73 | 73 | You can implement other color schemes easily, the syntax is fairly |
|
74 | 74 | self-explanatory. Please send back new schemes you develop to the author for |
|
75 | 75 | possible inclusion in future releases. |
|
76 | 76 | |
|
77 | 77 | Inheritance diagram: |
|
78 | 78 | |
|
79 | 79 | .. inheritance-diagram:: IPython.core.ultratb |
|
80 | 80 | :parts: 3 |
|
81 | 81 | """ |
|
82 | 82 | |
|
83 | 83 | #***************************************************************************** |
|
84 | 84 | # Copyright (C) 2001 Nathaniel Gray <n8gray@caltech.edu> |
|
85 | 85 | # Copyright (C) 2001-2004 Fernando Perez <fperez@colorado.edu> |
|
86 | 86 | # |
|
87 | 87 | # Distributed under the terms of the BSD License. The full license is in |
|
88 | 88 | # the file COPYING, distributed as part of this software. |
|
89 | 89 | #***************************************************************************** |
|
90 | 90 | |
|
91 | 91 | |
|
92 | 92 | import dis |
|
93 | 93 | import inspect |
|
94 | 94 | import keyword |
|
95 | 95 | import linecache |
|
96 | 96 | import os |
|
97 | 97 | import pydoc |
|
98 | 98 | import re |
|
99 | 99 | import sys |
|
100 | 100 | import time |
|
101 | 101 | import tokenize |
|
102 | 102 | import traceback |
|
103 | 103 | |
|
104 | 104 | try: # Python 2 |
|
105 | 105 | generate_tokens = tokenize.generate_tokens |
|
106 | 106 | except AttributeError: # Python 3 |
|
107 | 107 | generate_tokens = tokenize.tokenize |
|
108 | 108 | |
|
109 | 109 | # For purposes of monkeypatching inspect to fix a bug in it. |
|
110 | 110 | from inspect import getsourcefile, getfile, getmodule, \ |
|
111 | 111 | ismodule, isclass, ismethod, isfunction, istraceback, isframe, iscode |
|
112 | 112 | |
|
113 | 113 | # IPython's own modules |
|
114 | 114 | from IPython import get_ipython |
|
115 | 115 | from IPython.core import debugger |
|
116 | 116 | from IPython.core.display_trap import DisplayTrap |
|
117 | 117 | from IPython.core.excolors import exception_colors |
|
118 | 118 | from IPython.utils import PyColorize |
|
119 | 119 | from IPython.utils import path as util_path |
|
120 | 120 | from IPython.utils import py3compat |
|
121 | 121 | from IPython.utils.data import uniq_stable |
|
122 | 122 | from IPython.utils.terminal import get_terminal_size |
|
123 | 123 | |
|
124 | 124 | from logging import info, error, debug |
|
125 | 125 | |
|
126 | 126 | from importlib.util import source_from_cache |
|
127 | 127 | |
|
128 | 128 | import IPython.utils.colorable as colorable |
|
129 | 129 | |
|
130 | 130 | # Globals |
|
131 | 131 | # amount of space to put line numbers before verbose tracebacks |
|
132 | 132 | INDENT_SIZE = 8 |
|
133 | 133 | |
|
134 | 134 | # Default color scheme. This is used, for example, by the traceback |
|
135 | 135 | # formatter. When running in an actual IPython instance, the user's rc.colors |
|
136 | 136 | # value is used, but having a module global makes this functionality available |
|
137 | 137 | # to users of ultratb who are NOT running inside ipython. |
|
138 | 138 | DEFAULT_SCHEME = 'NoColor' |
|
139 | 139 | |
|
140 | 140 | # --------------------------------------------------------------------------- |
|
141 | 141 | # Code begins |
|
142 | 142 | |
|
143 | 143 | # Utility functions |
|
144 | 144 | def inspect_error(): |
|
145 | 145 | """Print a message about internal inspect errors. |
|
146 | 146 | |
|
147 | 147 | These are unfortunately quite common.""" |
|
148 | 148 | |
|
149 | 149 | error('Internal Python error in the inspect module.\n' |
|
150 | 150 | 'Below is the traceback from this internal error.\n') |
|
151 | 151 | |
|
152 | 152 | |
|
153 | 153 | # This function is a monkeypatch we apply to the Python inspect module. We have |
|
154 | 154 | # now found when it's needed (see discussion on issue gh-1456), and we have a |
|
155 | 155 | # test case (IPython.core.tests.test_ultratb.ChangedPyFileTest) that fails if |
|
156 | 156 | # the monkeypatch is not applied. TK, Aug 2012. |
|
157 | 157 | def findsource(object): |
|
158 | 158 | """Return the entire source file and starting line number for an object. |
|
159 | 159 | |
|
160 | 160 | The argument may be a module, class, method, function, traceback, frame, |
|
161 | 161 | or code object. The source code is returned as a list of all the lines |
|
162 | 162 | in the file and the line number indexes a line in that list. An IOError |
|
163 | 163 | is raised if the source code cannot be retrieved. |
|
164 | 164 | |
|
165 | 165 | FIXED version with which we monkeypatch the stdlib to work around a bug.""" |
|
166 | 166 | |
|
167 | 167 | file = getsourcefile(object) or getfile(object) |
|
168 | 168 | # If the object is a frame, then trying to get the globals dict from its |
|
169 | 169 | # module won't work. Instead, the frame object itself has the globals |
|
170 | 170 | # dictionary. |
|
171 | 171 | globals_dict = None |
|
172 | 172 | if inspect.isframe(object): |
|
173 | 173 | # XXX: can this ever be false? |
|
174 | 174 | globals_dict = object.f_globals |
|
175 | 175 | else: |
|
176 | 176 | module = getmodule(object, file) |
|
177 | 177 | if module: |
|
178 | 178 | globals_dict = module.__dict__ |
|
179 | 179 | lines = linecache.getlines(file, globals_dict) |
|
180 | 180 | if not lines: |
|
181 | 181 | raise IOError('could not get source code') |
|
182 | 182 | |
|
183 | 183 | if ismodule(object): |
|
184 | 184 | return lines, 0 |
|
185 | 185 | |
|
186 | 186 | if isclass(object): |
|
187 | 187 | name = object.__name__ |
|
188 | 188 | pat = re.compile(r'^(\s*)class\s*' + name + r'\b') |
|
189 | 189 | # make some effort to find the best matching class definition: |
|
190 | 190 | # use the one with the least indentation, which is the one |
|
191 | 191 | # that's most probably not inside a function definition. |
|
192 | 192 | candidates = [] |
|
193 | 193 | for i, line in enumerate(lines): |
|
194 | 194 | match = pat.match(line) |
|
195 | 195 | if match: |
|
196 | 196 | # if it's at toplevel, it's already the best one |
|
197 | 197 | if line[0] == 'c': |
|
198 | 198 | return lines, i |
|
199 | 199 | # else add whitespace to candidate list |
|
200 | 200 | candidates.append((match.group(1), i)) |
|
201 | 201 | if candidates: |
|
202 | 202 | # this will sort by whitespace, and by line number, |
|
203 | 203 | # less whitespace first |
|
204 | 204 | candidates.sort() |
|
205 | 205 | return lines, candidates[0][1] |
|
206 | 206 | else: |
|
207 | 207 | raise IOError('could not find class definition') |
|
208 | 208 | |
|
209 | 209 | if ismethod(object): |
|
210 | 210 | object = object.__func__ |
|
211 | 211 | if isfunction(object): |
|
212 | 212 | object = object.__code__ |
|
213 | 213 | if istraceback(object): |
|
214 | 214 | object = object.tb_frame |
|
215 | 215 | if isframe(object): |
|
216 | 216 | object = object.f_code |
|
217 | 217 | if iscode(object): |
|
218 | 218 | if not hasattr(object, 'co_firstlineno'): |
|
219 | 219 | raise IOError('could not find function definition') |
|
220 | 220 | pat = re.compile(r'^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)') |
|
221 | 221 | pmatch = pat.match |
|
222 | 222 | # fperez - fix: sometimes, co_firstlineno can give a number larger than |
|
223 | 223 | # the length of lines, which causes an error. Safeguard against that. |
|
224 | 224 | lnum = min(object.co_firstlineno, len(lines)) - 1 |
|
225 | 225 | while lnum > 0: |
|
226 | 226 | if pmatch(lines[lnum]): |
|
227 | 227 | break |
|
228 | 228 | lnum -= 1 |
|
229 | 229 | |
|
230 | 230 | return lines, lnum |
|
231 | 231 | raise IOError('could not find code object') |
|
232 | 232 | |
|
233 | 233 | |
|
234 | 234 | # This is a patched version of inspect.getargs that applies the (unmerged) |
|
235 | 235 | # patch for http://bugs.python.org/issue14611 by Stefano Taschini. This fixes |
|
236 | 236 | # https://github.com/ipython/ipython/issues/8205 and |
|
237 | 237 | # https://github.com/ipython/ipython/issues/8293 |
|
238 | 238 | def getargs(co): |
|
239 | 239 | """Get information about the arguments accepted by a code object. |
|
240 | 240 | |
|
241 | 241 | Three things are returned: (args, varargs, varkw), where 'args' is |
|
242 | 242 | a list of argument names (possibly containing nested lists), and |
|
243 | 243 | 'varargs' and 'varkw' are the names of the * and ** arguments or None.""" |
|
244 | 244 | if not iscode(co): |
|
245 | 245 | raise TypeError('{!r} is not a code object'.format(co)) |
|
246 | 246 | |
|
247 | 247 | nargs = co.co_argcount |
|
248 | 248 | names = co.co_varnames |
|
249 | 249 | args = list(names[:nargs]) |
|
250 | 250 | step = 0 |
|
251 | 251 | |
|
252 | 252 | # The following acrobatics are for anonymous (tuple) arguments. |
|
253 | 253 | for i in range(nargs): |
|
254 | 254 | if args[i][:1] in ('', '.'): |
|
255 | 255 | stack, remain, count = [], [], [] |
|
256 | 256 | while step < len(co.co_code): |
|
257 | 257 | op = ord(co.co_code[step]) |
|
258 | 258 | step = step + 1 |
|
259 | 259 | if op >= dis.HAVE_ARGUMENT: |
|
260 | 260 | opname = dis.opname[op] |
|
261 | 261 | value = ord(co.co_code[step]) + ord(co.co_code[step+1])*256 |
|
262 | 262 | step = step + 2 |
|
263 | 263 | if opname in ('UNPACK_TUPLE', 'UNPACK_SEQUENCE'): |
|
264 | 264 | remain.append(value) |
|
265 | 265 | count.append(value) |
|
266 | 266 | elif opname in ('STORE_FAST', 'STORE_DEREF'): |
|
267 | 267 | if op in dis.haslocal: |
|
268 | 268 | stack.append(co.co_varnames[value]) |
|
269 | 269 | elif op in dis.hasfree: |
|
270 | 270 | stack.append((co.co_cellvars + co.co_freevars)[value]) |
|
271 | 271 | # Special case for sublists of length 1: def foo((bar)) |
|
272 | 272 | # doesn't generate the UNPACK_TUPLE bytecode, so if |
|
273 | 273 | # `remain` is empty here, we have such a sublist. |
|
274 | 274 | if not remain: |
|
275 | 275 | stack[0] = [stack[0]] |
|
276 | 276 | break |
|
277 | 277 | else: |
|
278 | 278 | remain[-1] = remain[-1] - 1 |
|
279 | 279 | while remain[-1] == 0: |
|
280 | 280 | remain.pop() |
|
281 | 281 | size = count.pop() |
|
282 | 282 | stack[-size:] = [stack[-size:]] |
|
283 | 283 | if not remain: |
|
284 | 284 | break |
|
285 | 285 | remain[-1] = remain[-1] - 1 |
|
286 | 286 | if not remain: |
|
287 | 287 | break |
|
288 | 288 | args[i] = stack[0] |
|
289 | 289 | |
|
290 | 290 | varargs = None |
|
291 | 291 | if co.co_flags & inspect.CO_VARARGS: |
|
292 | 292 | varargs = co.co_varnames[nargs] |
|
293 | 293 | nargs = nargs + 1 |
|
294 | 294 | varkw = None |
|
295 | 295 | if co.co_flags & inspect.CO_VARKEYWORDS: |
|
296 | 296 | varkw = co.co_varnames[nargs] |
|
297 | 297 | return inspect.Arguments(args, varargs, varkw) |
|
298 | 298 | |
|
299 | 299 | |
|
300 | 300 | # Monkeypatch inspect to apply our bugfix. |
|
301 | 301 | def with_patch_inspect(f): |
|
302 | 302 | """ |
|
303 | 303 | Deprecated since IPython 6.0 |
|
304 | 304 | decorator for monkeypatching inspect.findsource |
|
305 | 305 | """ |
|
306 | 306 | |
|
307 | 307 | def wrapped(*args, **kwargs): |
|
308 | 308 | save_findsource = inspect.findsource |
|
309 | 309 | save_getargs = inspect.getargs |
|
310 | 310 | inspect.findsource = findsource |
|
311 | 311 | inspect.getargs = getargs |
|
312 | 312 | try: |
|
313 | 313 | return f(*args, **kwargs) |
|
314 | 314 | finally: |
|
315 | 315 | inspect.findsource = save_findsource |
|
316 | 316 | inspect.getargs = save_getargs |
|
317 | 317 | |
|
318 | 318 | return wrapped |
|
319 | 319 | |
|
320 | 320 | |
|
321 | 321 | def fix_frame_records_filenames(records): |
|
322 | 322 | """Try to fix the filenames in each record from inspect.getinnerframes(). |
|
323 | 323 | |
|
324 | 324 | Particularly, modules loaded from within zip files have useless filenames |
|
325 | 325 | attached to their code object, and inspect.getinnerframes() just uses it. |
|
326 | 326 | """ |
|
327 | 327 | fixed_records = [] |
|
328 | 328 | for frame, filename, line_no, func_name, lines, index in records: |
|
329 | 329 | # Look inside the frame's globals dictionary for __file__, |
|
330 | 330 | # which should be better. However, keep Cython filenames since |
|
331 | 331 | # we prefer the source filenames over the compiled .so file. |
|
332 | 332 | if not filename.endswith(('.pyx', '.pxd', '.pxi')): |
|
333 | 333 | better_fn = frame.f_globals.get('__file__', None) |
|
334 | 334 | if isinstance(better_fn, str): |
|
335 | 335 | # Check the type just in case someone did something weird with |
|
336 | 336 | # __file__. It might also be None if the error occurred during |
|
337 | 337 | # import. |
|
338 | 338 | filename = better_fn |
|
339 | 339 | fixed_records.append((frame, filename, line_no, func_name, lines, index)) |
|
340 | 340 | return fixed_records |
|
341 | 341 | |
|
342 | 342 | |
|
343 | 343 | @with_patch_inspect |
|
344 | 344 | def _fixed_getinnerframes(etb, context=1, tb_offset=0): |
|
345 | 345 | LNUM_POS, LINES_POS, INDEX_POS = 2, 4, 5 |
|
346 | 346 | |
|
347 | 347 | records = fix_frame_records_filenames(inspect.getinnerframes(etb, context)) |
|
348 | 348 | # If the error is at the console, don't build any context, since it would |
|
349 | 349 | # otherwise produce 5 blank lines printed out (there is no file at the |
|
350 | 350 | # console) |
|
351 | 351 | rec_check = records[tb_offset:] |
|
352 | 352 | try: |
|
353 | 353 | rname = rec_check[0][1] |
|
354 | 354 | if rname == '<ipython console>' or rname.endswith('<string>'): |
|
355 | 355 | return rec_check |
|
356 | 356 | except IndexError: |
|
357 | 357 | pass |
|
358 | 358 | |
|
359 | 359 | aux = traceback.extract_tb(etb) |
|
360 | 360 | assert len(records) == len(aux) |
|
361 | 361 | for i, (file, lnum, _, _) in enumerate(aux): |
|
362 | 362 | maybeStart = lnum - 1 - context // 2 |
|
363 | 363 | start = max(maybeStart, 0) |
|
364 | 364 | end = start + context |
|
365 | 365 | lines = linecache.getlines(file)[start:end] |
|
366 | 366 | buf = list(records[i]) |
|
367 | 367 | buf[LNUM_POS] = lnum |
|
368 | 368 | buf[INDEX_POS] = lnum - 1 - start |
|
369 | 369 | buf[LINES_POS] = lines |
|
370 | 370 | records[i] = tuple(buf) |
|
371 | 371 | return records[tb_offset:] |
|
372 | 372 | |
|
373 | 373 | # Helper function -- largely belongs to VerboseTB, but we need the same |
|
374 | 374 | # functionality to produce a pseudo verbose TB for SyntaxErrors, so that they |
|
375 | 375 | # can be recognized properly by ipython.el's py-traceback-line-re |
|
376 | 376 | # (SyntaxErrors have to be treated specially because they have no traceback) |
|
377 | 377 | |
|
378 | 378 | |
|
379 | 379 | def _format_traceback_lines(lnum, index, lines, Colors, lvals, _line_format): |
|
380 | 380 | """ |
|
381 | 381 | Format tracebacks lines with pointing arrow, leading numbers... |
|
382 | 382 | |
|
383 | 383 | Parameters |
|
384 | 384 | ========== |
|
385 | 385 | |
|
386 | 386 | lnum: int |
|
387 | 387 | index: int |
|
388 | 388 | lines: list[string] |
|
389 | 389 | Colors: |
|
390 | 390 | ColorScheme used. |
|
391 | 391 | lvals: bytes |
|
392 | 392 | Values of local variables, already colored, to inject just after the error line. |
|
393 | 393 | _line_format: f (str) -> (str, bool) |
|
394 | 394 | return (colorized version of str, failure to do so) |
|
395 | 395 | """ |
|
396 | 396 | numbers_width = INDENT_SIZE - 1 |
|
397 | 397 | res = [] |
|
398 | 398 | |
|
399 | 399 | for i,line in enumerate(lines, lnum-index): |
|
400 | 400 | line = py3compat.cast_unicode(line) |
|
401 | 401 | |
|
402 | 402 | new_line, err = _line_format(line, 'str') |
|
403 | 403 | if not err: |
|
404 | 404 | line = new_line |
|
405 | 405 | |
|
406 | 406 | if i == lnum: |
|
407 | 407 | # This is the line with the error |
|
408 | 408 | pad = numbers_width - len(str(i)) |
|
409 | 409 | num = '%s%s' % (debugger.make_arrow(pad), str(lnum)) |
|
410 | 410 | line = '%s%s%s %s%s' % (Colors.linenoEm, num, |
|
411 | 411 | Colors.line, line, Colors.Normal) |
|
412 | 412 | else: |
|
413 | 413 | num = '%*s' % (numbers_width, i) |
|
414 | 414 | line = '%s%s%s %s' % (Colors.lineno, num, |
|
415 | 415 | Colors.Normal, line) |
|
416 | 416 | |
|
417 | 417 | res.append(line) |
|
418 | 418 | if lvals and i == lnum: |
|
419 | 419 | res.append(lvals + '\n') |
|
420 | 420 | return res |
|
421 | 421 | |
|
422 | 422 | def is_recursion_error(etype, value, records): |
|
423 | 423 | try: |
|
424 | 424 | # RecursionError is new in Python 3.5 |
|
425 | 425 | recursion_error_type = RecursionError |
|
426 | 426 | except NameError: |
|
427 | 427 | recursion_error_type = RuntimeError |
|
428 | 428 | |
|
429 | 429 | # The default recursion limit is 1000, but some of that will be taken up |
|
430 | 430 | # by stack frames in IPython itself. >500 frames probably indicates |
|
431 | 431 | # a recursion error. |
|
432 | 432 | return (etype is recursion_error_type) \ |
|
433 | 433 | and "recursion" in str(value).lower() \ |
|
434 | 434 | and len(records) > 500 |
|
435 | 435 | |
|
436 | 436 | def find_recursion(etype, value, records): |
|
437 | 437 | """Identify the repeating stack frames from a RecursionError traceback |
|
438 | 438 | |
|
439 | 439 | 'records' is a list as returned by VerboseTB.get_records() |
|
440 | 440 | |
|
441 | 441 | Returns (last_unique, repeat_length) |
|
442 | 442 | """ |
|
443 | 443 | # This involves a bit of guesswork - we want to show enough of the traceback |
|
444 | 444 | # to indicate where the recursion is occurring. We guess that the innermost |
|
445 | 445 | # quarter of the traceback (250 frames by default) is repeats, and find the |
|
446 | 446 | # first frame (from in to out) that looks different. |
|
447 | 447 | if not is_recursion_error(etype, value, records): |
|
448 | 448 | return len(records), 0 |
|
449 | 449 | |
|
450 | 450 | # Select filename, lineno, func_name to track frames with |
|
451 | 451 | records = [r[1:4] for r in records] |
|
452 | 452 | inner_frames = records[-(len(records)//4):] |
|
453 | 453 | frames_repeated = set(inner_frames) |
|
454 | 454 | |
|
455 | 455 | last_seen_at = {} |
|
456 | 456 | longest_repeat = 0 |
|
457 | 457 | i = len(records) |
|
458 | 458 | for frame in reversed(records): |
|
459 | 459 | i -= 1 |
|
460 | 460 | if frame not in frames_repeated: |
|
461 | 461 | last_unique = i |
|
462 | 462 | break |
|
463 | 463 | |
|
464 | 464 | if frame in last_seen_at: |
|
465 | 465 | distance = last_seen_at[frame] - i |
|
466 | 466 | longest_repeat = max(longest_repeat, distance) |
|
467 | 467 | |
|
468 | 468 | last_seen_at[frame] = i |
|
469 | 469 | else: |
|
470 | 470 | last_unique = 0 # The whole traceback was recursion |
|
471 | 471 | |
|
472 | 472 | return last_unique, longest_repeat |
|
473 | 473 | |
|
474 | 474 | #--------------------------------------------------------------------------- |
|
475 | 475 | # Module classes |
|
476 | 476 | class TBTools(colorable.Colorable): |
|
477 | 477 | """Basic tools used by all traceback printer classes.""" |
|
478 | 478 | |
|
479 | 479 | # Number of frames to skip when reporting tracebacks |
|
480 | 480 | tb_offset = 0 |
|
481 | 481 | |
|
482 | 482 | def __init__(self, color_scheme='NoColor', call_pdb=False, ostream=None, parent=None, config=None): |
|
483 | 483 | # Whether to call the interactive pdb debugger after printing |
|
484 | 484 | # tracebacks or not |
|
485 | 485 | super(TBTools, self).__init__(parent=parent, config=config) |
|
486 | 486 | self.call_pdb = call_pdb |
|
487 | 487 | |
|
488 | 488 | # Output stream to write to. Note that we store the original value in |
|
489 | 489 | # a private attribute and then make the public ostream a property, so |
|
490 | 490 | # that we can delay accessing sys.stdout until runtime. The way |
|
491 | 491 | # things are written now, the sys.stdout object is dynamically managed |
|
492 | 492 | # so a reference to it should NEVER be stored statically. This |
|
493 | 493 | # property approach confines this detail to a single location, and all |
|
494 | 494 | # subclasses can simply access self.ostream for writing. |
|
495 | 495 | self._ostream = ostream |
|
496 | 496 | |
|
497 | 497 | # Create color table |
|
498 | 498 | self.color_scheme_table = exception_colors() |
|
499 | 499 | |
|
500 | 500 | self.set_colors(color_scheme) |
|
501 | 501 | self.old_scheme = color_scheme # save initial value for toggles |
|
502 | 502 | |
|
503 | 503 | if call_pdb: |
|
504 | 504 | self.pdb = debugger.Pdb() |
|
505 | 505 | else: |
|
506 | 506 | self.pdb = None |
|
507 | 507 | |
|
508 | 508 | def _get_ostream(self): |
|
509 | 509 | """Output stream that exceptions are written to. |
|
510 | 510 | |
|
511 | 511 | Valid values are: |
|
512 | 512 | |
|
513 | 513 | - None: the default, which means that IPython will dynamically resolve |
|
514 | 514 | to sys.stdout. This ensures compatibility with most tools, including |
|
515 | 515 | Windows (where plain stdout doesn't recognize ANSI escapes). |
|
516 | 516 | |
|
517 | 517 | - Any object with 'write' and 'flush' attributes. |
|
518 | 518 | """ |
|
519 | 519 | return sys.stdout if self._ostream is None else self._ostream |
|
520 | 520 | |
|
521 | 521 | def _set_ostream(self, val): |
|
522 | 522 | assert val is None or (hasattr(val, 'write') and hasattr(val, 'flush')) |
|
523 | 523 | self._ostream = val |
|
524 | 524 | |
|
525 | 525 | ostream = property(_get_ostream, _set_ostream) |
|
526 | 526 | |
|
527 | 527 | def set_colors(self, *args, **kw): |
|
528 | 528 | """Shorthand access to the color table scheme selector method.""" |
|
529 | 529 | |
|
530 | 530 | # Set own color table |
|
531 | 531 | self.color_scheme_table.set_active_scheme(*args, **kw) |
|
532 | 532 | # for convenience, set Colors to the active scheme |
|
533 | 533 | self.Colors = self.color_scheme_table.active_colors |
|
534 | 534 | # Also set colors of debugger |
|
535 | 535 | if hasattr(self, 'pdb') and self.pdb is not None: |
|
536 | 536 | self.pdb.set_colors(*args, **kw) |
|
537 | 537 | |
|
538 | 538 | def color_toggle(self): |
|
539 | 539 | """Toggle between the currently active color scheme and NoColor.""" |
|
540 | 540 | |
|
541 | 541 | if self.color_scheme_table.active_scheme_name == 'NoColor': |
|
542 | 542 | self.color_scheme_table.set_active_scheme(self.old_scheme) |
|
543 | 543 | self.Colors = self.color_scheme_table.active_colors |
|
544 | 544 | else: |
|
545 | 545 | self.old_scheme = self.color_scheme_table.active_scheme_name |
|
546 | 546 | self.color_scheme_table.set_active_scheme('NoColor') |
|
547 | 547 | self.Colors = self.color_scheme_table.active_colors |
|
548 | 548 | |
|
549 | 549 | def stb2text(self, stb): |
|
550 | 550 | """Convert a structured traceback (a list) to a string.""" |
|
551 | 551 | return '\n'.join(stb) |
|
552 | 552 | |
|
553 | 553 | def text(self, etype, value, tb, tb_offset=None, context=5): |
|
554 | 554 | """Return formatted traceback. |
|
555 | 555 | |
|
556 | 556 | Subclasses may override this if they add extra arguments. |
|
557 | 557 | """ |
|
558 | 558 | tb_list = self.structured_traceback(etype, value, tb, |
|
559 | 559 | tb_offset, context) |
|
560 | 560 | return self.stb2text(tb_list) |
|
561 | 561 | |
|
562 | 562 | def structured_traceback(self, etype, evalue, tb, tb_offset=None, |
|
563 | 563 | context=5, mode=None): |
|
564 | 564 | """Return a list of traceback frames. |
|
565 | 565 | |
|
566 | 566 | Must be implemented by each class. |
|
567 | 567 | """ |
|
568 | 568 | raise NotImplementedError() |
|
569 | 569 | |
|
570 | 570 | |
|
571 | 571 | #--------------------------------------------------------------------------- |
|
572 | 572 | class ListTB(TBTools): |
|
573 | 573 | """Print traceback information from a traceback list, with optional color. |
|
574 | 574 | |
|
575 | 575 | Calling requires 3 arguments: (etype, evalue, elist) |
|
576 | 576 | as would be obtained by:: |
|
577 | 577 | |
|
578 | 578 | etype, evalue, tb = sys.exc_info() |
|
579 | 579 | if tb: |
|
580 | 580 | elist = traceback.extract_tb(tb) |
|
581 | 581 | else: |
|
582 | 582 | elist = None |
|
583 | 583 | |
|
584 | 584 | It can thus be used by programs which need to process the traceback before |
|
585 | 585 | printing (such as console replacements based on the code module from the |
|
586 | 586 | standard library). |
|
587 | 587 | |
|
588 | 588 | Because they are meant to be called without a full traceback (only a |
|
589 | 589 | list), instances of this class can't call the interactive pdb debugger.""" |
|
590 | 590 | |
|
591 | 591 | def __init__(self, color_scheme='NoColor', call_pdb=False, ostream=None, parent=None, config=None): |
|
592 | 592 | TBTools.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, |
|
593 | 593 | ostream=ostream, parent=parent,config=config) |
|
594 | 594 | |
|
595 | 595 | def __call__(self, etype, value, elist): |
|
596 | 596 | self.ostream.flush() |
|
597 | 597 | self.ostream.write(self.text(etype, value, elist)) |
|
598 | 598 | self.ostream.write('\n') |
|
599 | 599 | |
|
600 | 600 | def structured_traceback(self, etype, value, elist, tb_offset=None, |
|
601 | 601 | context=5): |
|
602 | 602 | """Return a color formatted string with the traceback info. |
|
603 | 603 | |
|
604 | 604 | Parameters |
|
605 | 605 | ---------- |
|
606 | 606 | etype : exception type |
|
607 | 607 | Type of the exception raised. |
|
608 | 608 | |
|
609 | 609 | value : object |
|
610 | 610 | Data stored in the exception |
|
611 | 611 | |
|
612 | 612 | elist : list |
|
613 | 613 | List of frames, see class docstring for details. |
|
614 | 614 | |
|
615 | 615 | tb_offset : int, optional |
|
616 | 616 | Number of frames in the traceback to skip. If not given, the |
|
617 | 617 | instance value is used (set in constructor). |
|
618 | 618 | |
|
619 | 619 | context : int, optional |
|
620 | 620 | Number of lines of context information to print. |
|
621 | 621 | |
|
622 | 622 | Returns |
|
623 | 623 | ------- |
|
624 | 624 | String with formatted exception. |
|
625 | 625 | """ |
|
626 | 626 | tb_offset = self.tb_offset if tb_offset is None else tb_offset |
|
627 | 627 | Colors = self.Colors |
|
628 | 628 | out_list = [] |
|
629 | 629 | if elist: |
|
630 | 630 | |
|
631 | 631 | if tb_offset and len(elist) > tb_offset: |
|
632 | 632 | elist = elist[tb_offset:] |
|
633 | 633 | |
|
634 | 634 | out_list.append('Traceback %s(most recent call last)%s:' % |
|
635 | 635 | (Colors.normalEm, Colors.Normal) + '\n') |
|
636 | 636 | out_list.extend(self._format_list(elist)) |
|
637 | 637 | # The exception info should be a single entry in the list. |
|
638 | 638 | lines = ''.join(self._format_exception_only(etype, value)) |
|
639 | 639 | out_list.append(lines) |
|
640 | 640 | |
|
641 | 641 | return out_list |
|
642 | 642 | |
|
643 | 643 | def _format_list(self, extracted_list): |
|
644 | 644 | """Format a list of traceback entry tuples for printing. |
|
645 | 645 | |
|
646 | 646 | Given a list of tuples as returned by extract_tb() or |
|
647 | 647 | extract_stack(), return a list of strings ready for printing. |
|
648 | 648 | Each string in the resulting list corresponds to the item with the |
|
649 | 649 | same index in the argument list. Each string ends in a newline; |
|
650 | 650 | the strings may contain internal newlines as well, for those items |
|
651 | 651 | whose source text line is not None. |
|
652 | 652 | |
|
653 | 653 | Lifted almost verbatim from traceback.py |
|
654 | 654 | """ |
|
655 | 655 | |
|
656 | 656 | Colors = self.Colors |
|
657 | 657 | list = [] |
|
658 | 658 | for filename, lineno, name, line in extracted_list[:-1]: |
|
659 | 659 | item = ' File %s"%s"%s, line %s%d%s, in %s%s%s\n' % \ |
|
660 | 660 | (Colors.filename, filename, Colors.Normal, |
|
661 | 661 | Colors.lineno, lineno, Colors.Normal, |
|
662 | 662 | Colors.name, name, Colors.Normal) |
|
663 | 663 | if line: |
|
664 | 664 | item += ' %s\n' % line.strip() |
|
665 | 665 | list.append(item) |
|
666 | 666 | # Emphasize the last entry |
|
667 | 667 | filename, lineno, name, line = extracted_list[-1] |
|
668 | 668 | item = '%s File %s"%s"%s, line %s%d%s, in %s%s%s%s\n' % \ |
|
669 | 669 | (Colors.normalEm, |
|
670 | 670 | Colors.filenameEm, filename, Colors.normalEm, |
|
671 | 671 | Colors.linenoEm, lineno, Colors.normalEm, |
|
672 | 672 | Colors.nameEm, name, Colors.normalEm, |
|
673 | 673 | Colors.Normal) |
|
674 | 674 | if line: |
|
675 | 675 | item += '%s %s%s\n' % (Colors.line, line.strip(), |
|
676 | 676 | Colors.Normal) |
|
677 | 677 | list.append(item) |
|
678 | 678 | return list |
|
679 | 679 | |
|
680 | 680 | def _format_exception_only(self, etype, value): |
|
681 | 681 | """Format the exception part of a traceback. |
|
682 | 682 | |
|
683 | 683 | The arguments are the exception type and value such as given by |
|
684 | 684 | sys.exc_info()[:2]. The return value is a list of strings, each ending |
|
685 | 685 | in a newline. Normally, the list contains a single string; however, |
|
686 | 686 | for SyntaxError exceptions, it contains several lines that (when |
|
687 | 687 | printed) display detailed information about where the syntax error |
|
688 | 688 | occurred. The message indicating which exception occurred is the |
|
689 | 689 | always last string in the list. |
|
690 | 690 | |
|
691 | 691 | Also lifted nearly verbatim from traceback.py |
|
692 | 692 | """ |
|
693 | 693 | have_filedata = False |
|
694 | 694 | Colors = self.Colors |
|
695 | 695 | list = [] |
|
696 | 696 | stype = py3compat.cast_unicode(Colors.excName + etype.__name__ + Colors.Normal) |
|
697 | 697 | if value is None: |
|
698 | 698 | # Not sure if this can still happen in Python 2.6 and above |
|
699 | 699 | list.append(stype + '\n') |
|
700 | 700 | else: |
|
701 | 701 | if issubclass(etype, SyntaxError): |
|
702 | 702 | have_filedata = True |
|
703 | 703 | if not value.filename: value.filename = "<string>" |
|
704 | 704 | if value.lineno: |
|
705 | 705 | lineno = value.lineno |
|
706 | 706 | textline = linecache.getline(value.filename, value.lineno) |
|
707 | 707 | else: |
|
708 | 708 | lineno = 'unknown' |
|
709 | 709 | textline = '' |
|
710 | 710 | list.append('%s File %s"%s"%s, line %s%s%s\n' % \ |
|
711 | 711 | (Colors.normalEm, |
|
712 | 712 | Colors.filenameEm, py3compat.cast_unicode(value.filename), Colors.normalEm, |
|
713 | 713 | Colors.linenoEm, lineno, Colors.Normal )) |
|
714 | 714 | if textline == '': |
|
715 | 715 | textline = py3compat.cast_unicode(value.text, "utf-8") |
|
716 | 716 | |
|
717 | 717 | if textline is not None: |
|
718 | 718 | i = 0 |
|
719 | 719 | while i < len(textline) and textline[i].isspace(): |
|
720 | 720 | i += 1 |
|
721 | 721 | list.append('%s %s%s\n' % (Colors.line, |
|
722 | 722 | textline.strip(), |
|
723 | 723 | Colors.Normal)) |
|
724 | 724 | if value.offset is not None: |
|
725 | 725 | s = ' ' |
|
726 | 726 | for c in textline[i:value.offset - 1]: |
|
727 | 727 | if c.isspace(): |
|
728 | 728 | s += c |
|
729 | 729 | else: |
|
730 | 730 | s += ' ' |
|
731 | 731 | list.append('%s%s^%s\n' % (Colors.caret, s, |
|
732 | 732 | Colors.Normal)) |
|
733 | 733 | |
|
734 | 734 | try: |
|
735 | 735 | s = value.msg |
|
736 | 736 | except Exception: |
|
737 | 737 | s = self._some_str(value) |
|
738 | 738 | if s: |
|
739 | 739 | list.append('%s%s:%s %s\n' % (stype, Colors.excName, |
|
740 | 740 | Colors.Normal, s)) |
|
741 | 741 | else: |
|
742 | 742 | list.append('%s\n' % stype) |
|
743 | 743 | |
|
744 | 744 | # sync with user hooks |
|
745 | 745 | if have_filedata: |
|
746 | 746 | ipinst = get_ipython() |
|
747 | 747 | if ipinst is not None: |
|
748 | 748 | ipinst.hooks.synchronize_with_editor(value.filename, value.lineno, 0) |
|
749 | 749 | |
|
750 | 750 | return list |
|
751 | 751 | |
|
752 | 752 | def get_exception_only(self, etype, value): |
|
753 | 753 | """Only print the exception type and message, without a traceback. |
|
754 | 754 | |
|
755 | 755 | Parameters |
|
756 | 756 | ---------- |
|
757 | 757 | etype : exception type |
|
758 | 758 | value : exception value |
|
759 | 759 | """ |
|
760 | 760 | return ListTB.structured_traceback(self, etype, value, []) |
|
761 | 761 | |
|
762 | 762 | def show_exception_only(self, etype, evalue): |
|
763 | 763 | """Only print the exception type and message, without a traceback. |
|
764 | 764 | |
|
765 | 765 | Parameters |
|
766 | 766 | ---------- |
|
767 | 767 | etype : exception type |
|
768 | 768 | value : exception value |
|
769 | 769 | """ |
|
770 | 770 | # This method needs to use __call__ from *this* class, not the one from |
|
771 | 771 | # a subclass whose signature or behavior may be different |
|
772 | 772 | ostream = self.ostream |
|
773 | 773 | ostream.flush() |
|
774 | 774 | ostream.write('\n'.join(self.get_exception_only(etype, evalue))) |
|
775 | 775 | ostream.flush() |
|
776 | 776 | |
|
777 | 777 | def _some_str(self, value): |
|
778 | 778 | # Lifted from traceback.py |
|
779 | 779 | try: |
|
780 | 780 | return py3compat.cast_unicode(str(value)) |
|
781 | 781 | except: |
|
782 | 782 | return u'<unprintable %s object>' % type(value).__name__ |
|
783 | 783 | |
|
784 | 784 | |
|
785 | 785 | #---------------------------------------------------------------------------- |
|
786 | 786 | class VerboseTB(TBTools): |
|
787 | 787 | """A port of Ka-Ping Yee's cgitb.py module that outputs color text instead |
|
788 | 788 | of HTML. Requires inspect and pydoc. Crazy, man. |
|
789 | 789 | |
|
790 | 790 | Modified version which optionally strips the topmost entries from the |
|
791 | 791 | traceback, to be used with alternate interpreters (because their own code |
|
792 | 792 | would appear in the traceback).""" |
|
793 | 793 | |
|
794 | 794 | def __init__(self, color_scheme='Linux', call_pdb=False, ostream=None, |
|
795 | 795 | tb_offset=0, long_header=False, include_vars=True, |
|
796 | 796 | check_cache=None, debugger_cls = None, |
|
797 | 797 | parent=None, config=None): |
|
798 | 798 | """Specify traceback offset, headers and color scheme. |
|
799 | 799 | |
|
800 | 800 | Define how many frames to drop from the tracebacks. Calling it with |
|
801 | 801 | tb_offset=1 allows use of this handler in interpreters which will have |
|
802 | 802 | their own code at the top of the traceback (VerboseTB will first |
|
803 | 803 | remove that frame before printing the traceback info).""" |
|
804 | 804 | TBTools.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, |
|
805 | 805 | ostream=ostream, parent=parent, config=config) |
|
806 | 806 | self.tb_offset = tb_offset |
|
807 | 807 | self.long_header = long_header |
|
808 | 808 | self.include_vars = include_vars |
|
809 | 809 | # By default we use linecache.checkcache, but the user can provide a |
|
810 | 810 | # different check_cache implementation. This is used by the IPython |
|
811 | 811 | # kernel to provide tracebacks for interactive code that is cached, |
|
812 | 812 | # by a compiler instance that flushes the linecache but preserves its |
|
813 | 813 | # own code cache. |
|
814 | 814 | if check_cache is None: |
|
815 | 815 | check_cache = linecache.checkcache |
|
816 | 816 | self.check_cache = check_cache |
|
817 | 817 | |
|
818 | 818 | self.debugger_cls = debugger_cls or debugger.Pdb |
|
819 | 819 | |
|
820 | 820 | def format_records(self, records, last_unique, recursion_repeat): |
|
821 | 821 | """Format the stack frames of the traceback""" |
|
822 | 822 | frames = [] |
|
823 | 823 | for r in records[:last_unique+recursion_repeat+1]: |
|
824 | 824 | #print '*** record:',file,lnum,func,lines,index # dbg |
|
825 | 825 | frames.append(self.format_record(*r)) |
|
826 | 826 | |
|
827 | 827 | if recursion_repeat: |
|
828 | 828 | frames.append('... last %d frames repeated, from the frame below ...\n' % recursion_repeat) |
|
829 | 829 | frames.append(self.format_record(*records[last_unique+recursion_repeat+1])) |
|
830 | 830 | |
|
831 | 831 | return frames |
|
832 | 832 | |
|
833 | 833 | def format_record(self, frame, file, lnum, func, lines, index): |
|
834 | 834 | """Format a single stack frame""" |
|
835 | 835 | Colors = self.Colors # just a shorthand + quicker name lookup |
|
836 | 836 | ColorsNormal = Colors.Normal # used a lot |
|
837 | 837 | col_scheme = self.color_scheme_table.active_scheme_name |
|
838 | 838 | indent = ' ' * INDENT_SIZE |
|
839 | 839 | em_normal = '%s\n%s%s' % (Colors.valEm, indent, ColorsNormal) |
|
840 | 840 | undefined = '%sundefined%s' % (Colors.em, ColorsNormal) |
|
841 | 841 | tpl_link = '%s%%s%s' % (Colors.filenameEm, ColorsNormal) |
|
842 | 842 | tpl_call = 'in %s%%s%s%%s%s' % (Colors.vName, Colors.valEm, |
|
843 | 843 | ColorsNormal) |
|
844 | 844 | tpl_call_fail = 'in %s%%s%s(***failed resolving arguments***)%s' % \ |
|
845 | 845 | (Colors.vName, Colors.valEm, ColorsNormal) |
|
846 | 846 | tpl_local_var = '%s%%s%s' % (Colors.vName, ColorsNormal) |
|
847 | 847 | tpl_global_var = '%sglobal%s %s%%s%s' % (Colors.em, ColorsNormal, |
|
848 | 848 | Colors.vName, ColorsNormal) |
|
849 | 849 | tpl_name_val = '%%s %s= %%s%s' % (Colors.valEm, ColorsNormal) |
|
850 | 850 | |
|
851 | 851 | if not file: |
|
852 | 852 | file = '?' |
|
853 | 853 | elif file.startswith(str("<")) and file.endswith(str(">")): |
|
854 | 854 | # Not a real filename, no problem... |
|
855 | 855 | pass |
|
856 | 856 | elif not os.path.isabs(file): |
|
857 | 857 | # Try to make the filename absolute by trying all |
|
858 | 858 | # sys.path entries (which is also what linecache does) |
|
859 | 859 | for dirname in sys.path: |
|
860 | 860 | try: |
|
861 | 861 | fullname = os.path.join(dirname, file) |
|
862 | 862 | if os.path.isfile(fullname): |
|
863 | 863 | file = os.path.abspath(fullname) |
|
864 | 864 | break |
|
865 | 865 | except Exception: |
|
866 | 866 | # Just in case that sys.path contains very |
|
867 | 867 | # strange entries... |
|
868 | 868 | pass |
|
869 | 869 | |
|
870 | 870 | file = py3compat.cast_unicode(file, util_path.fs_encoding) |
|
871 | 871 | link = tpl_link % util_path.compress_user(file) |
|
872 | 872 | args, varargs, varkw, locals_ = inspect.getargvalues(frame) |
|
873 | 873 | |
|
874 | 874 | if func == '?': |
|
875 | 875 | call = '' |
|
876 | 876 | elif func == '<module>': |
|
877 | 877 | call = tpl_call % (func, '') |
|
878 | 878 | else: |
|
879 | 879 | # Decide whether to include variable details or not |
|
880 | 880 | var_repr = eqrepr if self.include_vars else nullrepr |
|
881 | 881 | try: |
|
882 | 882 | call = tpl_call % (func, inspect.formatargvalues(args, |
|
883 | 883 | varargs, varkw, |
|
884 | 884 | locals_, formatvalue=var_repr)) |
|
885 | 885 | except KeyError: |
|
886 | 886 | # This happens in situations like errors inside generator |
|
887 | 887 | # expressions, where local variables are listed in the |
|
888 | 888 | # line, but can't be extracted from the frame. I'm not |
|
889 | 889 | # 100% sure this isn't actually a bug in inspect itself, |
|
890 | 890 | # but since there's no info for us to compute with, the |
|
891 | 891 | # best we can do is report the failure and move on. Here |
|
892 | 892 | # we must *not* call any traceback construction again, |
|
893 | 893 | # because that would mess up use of %debug later on. So we |
|
894 | 894 | # simply report the failure and move on. The only |
|
895 | 895 | # limitation will be that this frame won't have locals |
|
896 | 896 | # listed in the call signature. Quite subtle problem... |
|
897 | 897 | # I can't think of a good way to validate this in a unit |
|
898 | 898 | # test, but running a script consisting of: |
|
899 | 899 | # dict( (k,v.strip()) for (k,v) in range(10) ) |
|
900 | 900 | # will illustrate the error, if this exception catch is |
|
901 | 901 | # disabled. |
|
902 | 902 | call = tpl_call_fail % func |
|
903 | 903 | |
|
904 | 904 | # Don't attempt to tokenize binary files. |
|
905 | 905 | if file.endswith(('.so', '.pyd', '.dll')): |
|
906 | 906 | return '%s %s\n' % (link, call) |
|
907 | 907 | |
|
908 | 908 | elif file.endswith(('.pyc', '.pyo')): |
|
909 | 909 | # Look up the corresponding source file. |
|
910 | 910 | try: |
|
911 | 911 | file = source_from_cache(file) |
|
912 | 912 | except ValueError: |
|
913 | 913 | # Failed to get the source file for some reason |
|
914 | 914 | # E.g. https://github.com/ipython/ipython/issues/9486 |
|
915 | 915 | return '%s %s\n' % (link, call) |
|
916 | 916 | |
|
917 | 917 | def linereader(file=file, lnum=[lnum], getline=linecache.getline): |
|
918 | 918 | line = getline(file, lnum[0]) |
|
919 | 919 | lnum[0] += 1 |
|
920 | 920 | return line |
|
921 | 921 | |
|
922 | 922 | # Build the list of names on this line of code where the exception |
|
923 | 923 | # occurred. |
|
924 | 924 | try: |
|
925 | 925 | names = [] |
|
926 | 926 | name_cont = False |
|
927 | 927 | |
|
928 | 928 | for token_type, token, start, end, line in generate_tokens(linereader): |
|
929 | 929 | # build composite names |
|
930 | 930 | if token_type == tokenize.NAME and token not in keyword.kwlist: |
|
931 | 931 | if name_cont: |
|
932 | 932 | # Continuation of a dotted name |
|
933 | 933 | try: |
|
934 | 934 | names[-1].append(token) |
|
935 | 935 | except IndexError: |
|
936 | 936 | names.append([token]) |
|
937 | 937 | name_cont = False |
|
938 | 938 | else: |
|
939 | 939 | # Regular new names. We append everything, the caller |
|
940 | 940 | # will be responsible for pruning the list later. It's |
|
941 | 941 | # very tricky to try to prune as we go, b/c composite |
|
942 | 942 | # names can fool us. The pruning at the end is easy |
|
943 | 943 | # to do (or the caller can print a list with repeated |
|
944 | 944 | # names if so desired. |
|
945 | 945 | names.append([token]) |
|
946 | 946 | elif token == '.': |
|
947 | 947 | name_cont = True |
|
948 | 948 | elif token_type == tokenize.NEWLINE: |
|
949 | 949 | break |
|
950 | 950 | |
|
951 | 951 | except (IndexError, UnicodeDecodeError, SyntaxError): |
|
952 | 952 | # signals exit of tokenizer |
|
953 | 953 | # SyntaxError can occur if the file is not actually Python |
|
954 | 954 | # - see gh-6300 |
|
955 | 955 | pass |
|
956 | 956 | except tokenize.TokenError as msg: |
|
957 | 957 | # Tokenizing may fail for various reasons, many of which are |
|
958 | 958 | # harmless. (A good example is when the line in question is the |
|
959 | 959 | # close of a triple-quoted string, cf gh-6864). We don't want to |
|
960 | 960 | # show this to users, but want make it available for debugging |
|
961 | 961 | # purposes. |
|
962 | 962 | _m = ("An unexpected error occurred while tokenizing input\n" |
|
963 | 963 | "The following traceback may be corrupted or invalid\n" |
|
964 | 964 | "The error message is: %s\n" % msg) |
|
965 | 965 | debug(_m) |
|
966 | 966 | |
|
967 | 967 | # Join composite names (e.g. "dict.fromkeys") |
|
968 | 968 | names = ['.'.join(n) for n in names] |
|
969 | 969 | # prune names list of duplicates, but keep the right order |
|
970 | 970 | unique_names = uniq_stable(names) |
|
971 | 971 | |
|
972 | 972 | # Start loop over vars |
|
973 | 973 | lvals = '' |
|
974 | 974 | lvals_list = [] |
|
975 | 975 | if self.include_vars: |
|
976 | 976 | for name_full in unique_names: |
|
977 | 977 | name_base = name_full.split('.', 1)[0] |
|
978 | 978 | if name_base in frame.f_code.co_varnames: |
|
979 | 979 | if name_base in locals_: |
|
980 | 980 | try: |
|
981 | 981 | value = repr(eval(name_full, locals_)) |
|
982 | 982 | except: |
|
983 | 983 | value = undefined |
|
984 | 984 | else: |
|
985 | 985 | value = undefined |
|
986 | 986 | name = tpl_local_var % name_full |
|
987 | 987 | else: |
|
988 | 988 | if name_base in frame.f_globals: |
|
989 | 989 | try: |
|
990 | 990 | value = repr(eval(name_full, frame.f_globals)) |
|
991 | 991 | except: |
|
992 | 992 | value = undefined |
|
993 | 993 | else: |
|
994 | 994 | value = undefined |
|
995 | 995 | name = tpl_global_var % name_full |
|
996 | 996 | lvals_list.append(tpl_name_val % (name, value)) |
|
997 | 997 | if lvals_list: |
|
998 | 998 | lvals = '%s%s' % (indent, em_normal.join(lvals_list)) |
|
999 | 999 | |
|
1000 | 1000 | level = '%s %s\n' % (link, call) |
|
1001 | 1001 | |
|
1002 | 1002 | if index is None: |
|
1003 | 1003 | return level |
|
1004 | 1004 | else: |
|
1005 | 1005 | _line_format = PyColorize.Parser(style=col_scheme, parent=self).format2 |
|
1006 | 1006 | return '%s%s' % (level, ''.join( |
|
1007 | 1007 | _format_traceback_lines(lnum, index, lines, Colors, lvals, |
|
1008 | 1008 | _line_format))) |
|
1009 | 1009 | |
|
1010 | 1010 | def prepare_chained_exception_message(self, cause): |
|
1011 | 1011 | direct_cause = "\nThe above exception was the direct cause of the following exception:\n" |
|
1012 | 1012 | exception_during_handling = "\nDuring handling of the above exception, another exception occurred:\n" |
|
1013 | 1013 | |
|
1014 | 1014 | if cause: |
|
1015 | 1015 | message = [[direct_cause]] |
|
1016 | 1016 | else: |
|
1017 | 1017 | message = [[exception_during_handling]] |
|
1018 | 1018 | return message |
|
1019 | 1019 | |
|
1020 | 1020 | def prepare_header(self, etype, long_version=False): |
|
1021 | 1021 | colors = self.Colors # just a shorthand + quicker name lookup |
|
1022 | 1022 | colorsnormal = colors.Normal # used a lot |
|
1023 | 1023 | exc = '%s%s%s' % (colors.excName, etype, colorsnormal) |
|
1024 | 1024 | width = min(75, get_terminal_size()[0]) |
|
1025 | 1025 | if long_version: |
|
1026 | 1026 | # Header with the exception type, python version, and date |
|
1027 | 1027 | pyver = 'Python ' + sys.version.split()[0] + ': ' + sys.executable |
|
1028 | 1028 | date = time.ctime(time.time()) |
|
1029 | 1029 | |
|
1030 | 1030 | head = '%s%s%s\n%s%s%s\n%s' % (colors.topline, '-' * width, colorsnormal, |
|
1031 | 1031 | exc, ' ' * (width - len(str(etype)) - len(pyver)), |
|
1032 | 1032 | pyver, date.rjust(width) ) |
|
1033 | 1033 | head += "\nA problem occurred executing Python code. Here is the sequence of function" \ |
|
1034 | 1034 | "\ncalls leading up to the error, with the most recent (innermost) call last." |
|
1035 | 1035 | else: |
|
1036 | 1036 | # Simplified header |
|
1037 | 1037 | head = '%s%s' % (exc, 'Traceback (most recent call last)'. \ |
|
1038 | 1038 | rjust(width - len(str(etype))) ) |
|
1039 | 1039 | |
|
1040 | 1040 | return head |
|
1041 | 1041 | |
|
1042 | 1042 | def format_exception(self, etype, evalue): |
|
1043 | 1043 | colors = self.Colors # just a shorthand + quicker name lookup |
|
1044 | 1044 | colorsnormal = colors.Normal # used a lot |
|
1045 | 1045 | # Get (safely) a string form of the exception info |
|
1046 | 1046 | try: |
|
1047 | 1047 | etype_str, evalue_str = map(str, (etype, evalue)) |
|
1048 | 1048 | except: |
|
1049 | 1049 | # User exception is improperly defined. |
|
1050 | 1050 | etype, evalue = str, sys.exc_info()[:2] |
|
1051 | 1051 | etype_str, evalue_str = map(str, (etype, evalue)) |
|
1052 | 1052 | # ... and format it |
|
1053 | 1053 | return ['%s%s%s: %s' % (colors.excName, etype_str, |
|
1054 | 1054 | colorsnormal, py3compat.cast_unicode(evalue_str))] |
|
1055 | 1055 | |
|
1056 | 1056 | def format_exception_as_a_whole(self, etype, evalue, etb, number_of_lines_of_context, tb_offset): |
|
1057 | 1057 | """Formats the header, traceback and exception message for a single exception. |
|
1058 | 1058 | |
|
1059 | 1059 | This may be called multiple times by Python 3 exception chaining |
|
1060 | 1060 | (PEP 3134). |
|
1061 | 1061 | """ |
|
1062 | 1062 | # some locals |
|
1063 | 1063 | orig_etype = etype |
|
1064 | 1064 | try: |
|
1065 | 1065 | etype = etype.__name__ |
|
1066 | 1066 | except AttributeError: |
|
1067 | 1067 | pass |
|
1068 | 1068 | |
|
1069 | 1069 | tb_offset = self.tb_offset if tb_offset is None else tb_offset |
|
1070 | 1070 | head = self.prepare_header(etype, self.long_header) |
|
1071 | 1071 | records = self.get_records(etb, number_of_lines_of_context, tb_offset) |
|
1072 | 1072 | |
|
1073 | 1073 | if records is None: |
|
1074 | 1074 | return "" |
|
1075 | 1075 | |
|
1076 | 1076 | last_unique, recursion_repeat = find_recursion(orig_etype, evalue, records) |
|
1077 | 1077 | |
|
1078 | 1078 | frames = self.format_records(records, last_unique, recursion_repeat) |
|
1079 | 1079 | |
|
1080 | 1080 | formatted_exception = self.format_exception(etype, evalue) |
|
1081 | 1081 | if records: |
|
1082 | 1082 | filepath, lnum = records[-1][1:3] |
|
1083 | 1083 | filepath = os.path.abspath(filepath) |
|
1084 | 1084 | ipinst = get_ipython() |
|
1085 | 1085 | if ipinst is not None: |
|
1086 | 1086 | ipinst.hooks.synchronize_with_editor(filepath, lnum, 0) |
|
1087 | 1087 | |
|
1088 | 1088 | return [[head] + frames + [''.join(formatted_exception[0])]] |
|
1089 | 1089 | |
|
1090 | 1090 | def get_records(self, etb, number_of_lines_of_context, tb_offset): |
|
1091 | 1091 | try: |
|
1092 | 1092 | # Try the default getinnerframes and Alex's: Alex's fixes some |
|
1093 | 1093 | # problems, but it generates empty tracebacks for console errors |
|
1094 | 1094 | # (5 blanks lines) where none should be returned. |
|
1095 | 1095 | return _fixed_getinnerframes(etb, number_of_lines_of_context, tb_offset) |
|
1096 | 1096 | except UnicodeDecodeError: |
|
1097 | 1097 | # This can occur if a file's encoding magic comment is wrong. |
|
1098 | 1098 | # I can't see a way to recover without duplicating a bunch of code |
|
1099 | 1099 | # from the stdlib traceback module. --TK |
|
1100 | 1100 | error('\nUnicodeDecodeError while processing traceback.\n') |
|
1101 | 1101 | return None |
|
1102 | 1102 | except: |
|
1103 | 1103 | # FIXME: I've been getting many crash reports from python 2.3 |
|
1104 | 1104 | # users, traceable to inspect.py. If I can find a small test-case |
|
1105 | 1105 | # to reproduce this, I should either write a better workaround or |
|
1106 | 1106 | # file a bug report against inspect (if that's the real problem). |
|
1107 | 1107 | # So far, I haven't been able to find an isolated example to |
|
1108 | 1108 | # reproduce the problem. |
|
1109 | 1109 | inspect_error() |
|
1110 | 1110 | traceback.print_exc(file=self.ostream) |
|
1111 | 1111 | info('\nUnfortunately, your original traceback can not be constructed.\n') |
|
1112 | 1112 | return None |
|
1113 | 1113 | |
|
1114 | 1114 | def get_parts_of_chained_exception(self, evalue): |
|
1115 | 1115 | def get_chained_exception(exception_value): |
|
1116 | 1116 | cause = getattr(exception_value, '__cause__', None) |
|
1117 | 1117 | if cause: |
|
1118 | 1118 | return cause |
|
1119 | 1119 | if getattr(exception_value, '__suppress_context__', False): |
|
1120 | 1120 | return None |
|
1121 | 1121 | return getattr(exception_value, '__context__', None) |
|
1122 | 1122 | |
|
1123 | 1123 | chained_evalue = get_chained_exception(evalue) |
|
1124 | 1124 | |
|
1125 | 1125 | if chained_evalue: |
|
1126 | 1126 | return chained_evalue.__class__, chained_evalue, chained_evalue.__traceback__ |
|
1127 | 1127 | |
|
1128 | 1128 | def structured_traceback(self, etype, evalue, etb, tb_offset=None, |
|
1129 | 1129 | number_of_lines_of_context=5): |
|
1130 | 1130 | """Return a nice text document describing the traceback.""" |
|
1131 | 1131 | |
|
1132 | 1132 | formatted_exception = self.format_exception_as_a_whole(etype, evalue, etb, number_of_lines_of_context, |
|
1133 | 1133 | tb_offset) |
|
1134 | 1134 | |
|
1135 | 1135 | colors = self.Colors # just a shorthand + quicker name lookup |
|
1136 | 1136 | colorsnormal = colors.Normal # used a lot |
|
1137 | 1137 | head = '%s%s%s' % (colors.topline, '-' * min(75, get_terminal_size()[0]), colorsnormal) |
|
1138 | 1138 | structured_traceback_parts = [head] |
|
1139 | 1139 | chained_exceptions_tb_offset = 0 |
|
1140 | 1140 | lines_of_context = 3 |
|
1141 | 1141 | formatted_exceptions = formatted_exception |
|
1142 | 1142 | exception = self.get_parts_of_chained_exception(evalue) |
|
1143 | 1143 | if exception: |
|
1144 | 1144 | formatted_exceptions += self.prepare_chained_exception_message(evalue.__cause__) |
|
1145 | 1145 | etype, evalue, etb = exception |
|
1146 | 1146 | else: |
|
1147 | 1147 | evalue = None |
|
1148 | 1148 | chained_exc_ids = set() |
|
1149 | 1149 | while evalue: |
|
1150 | 1150 | formatted_exceptions += self.format_exception_as_a_whole(etype, evalue, etb, lines_of_context, |
|
1151 | 1151 | chained_exceptions_tb_offset) |
|
1152 | 1152 | exception = self.get_parts_of_chained_exception(evalue) |
|
1153 | 1153 | |
|
1154 | 1154 | if exception and not id(exception[1]) in chained_exc_ids: |
|
1155 | 1155 | chained_exc_ids.add(id(exception[1])) # trace exception to avoid infinite 'cause' loop |
|
1156 | 1156 | formatted_exceptions += self.prepare_chained_exception_message(evalue.__cause__) |
|
1157 | 1157 | etype, evalue, etb = exception |
|
1158 | 1158 | else: |
|
1159 | 1159 | evalue = None |
|
1160 | 1160 | |
|
1161 | 1161 | # we want to see exceptions in a reversed order: |
|
1162 | 1162 | # the first exception should be on top |
|
1163 | 1163 | for formatted_exception in reversed(formatted_exceptions): |
|
1164 | 1164 | structured_traceback_parts += formatted_exception |
|
1165 | 1165 | |
|
1166 | 1166 | return structured_traceback_parts |
|
1167 | 1167 | |
|
1168 | 1168 | def debugger(self, force=False): |
|
1169 | 1169 | """Call up the pdb debugger if desired, always clean up the tb |
|
1170 | 1170 | reference. |
|
1171 | 1171 | |
|
1172 | 1172 | Keywords: |
|
1173 | 1173 | |
|
1174 | 1174 | - force(False): by default, this routine checks the instance call_pdb |
|
1175 | 1175 | flag and does not actually invoke the debugger if the flag is false. |
|
1176 | 1176 | The 'force' option forces the debugger to activate even if the flag |
|
1177 | 1177 | is false. |
|
1178 | 1178 | |
|
1179 | 1179 | If the call_pdb flag is set, the pdb interactive debugger is |
|
1180 | 1180 | invoked. In all cases, the self.tb reference to the current traceback |
|
1181 | 1181 | is deleted to prevent lingering references which hamper memory |
|
1182 | 1182 | management. |
|
1183 | 1183 | |
|
1184 | 1184 | Note that each call to pdb() does an 'import readline', so if your app |
|
1185 | 1185 | requires a special setup for the readline completers, you'll have to |
|
1186 | 1186 | fix that by hand after invoking the exception handler.""" |
|
1187 | 1187 | |
|
1188 | 1188 | if force or self.call_pdb: |
|
1189 | 1189 | if self.pdb is None: |
|
1190 | 1190 | self.pdb = self.debugger_cls() |
|
1191 | 1191 | # the system displayhook may have changed, restore the original |
|
1192 | 1192 | # for pdb |
|
1193 | 1193 | display_trap = DisplayTrap(hook=sys.__displayhook__) |
|
1194 | 1194 | with display_trap: |
|
1195 | 1195 | self.pdb.reset() |
|
1196 | 1196 | # Find the right frame so we don't pop up inside ipython itself |
|
1197 | 1197 | if hasattr(self, 'tb') and self.tb is not None: |
|
1198 | 1198 | etb = self.tb |
|
1199 | 1199 | else: |
|
1200 | 1200 | etb = self.tb = sys.last_traceback |
|
1201 | 1201 | while self.tb is not None and self.tb.tb_next is not None: |
|
1202 | 1202 | self.tb = self.tb.tb_next |
|
1203 | 1203 | if etb and etb.tb_next: |
|
1204 | 1204 | etb = etb.tb_next |
|
1205 | 1205 | self.pdb.botframe = etb.tb_frame |
|
1206 | 1206 | self.pdb.interaction(None, etb) |
|
1207 | 1207 | |
|
1208 | 1208 | if hasattr(self, 'tb'): |
|
1209 | 1209 | del self.tb |
|
1210 | 1210 | |
|
1211 | 1211 | def handler(self, info=None): |
|
1212 | 1212 | (etype, evalue, etb) = info or sys.exc_info() |
|
1213 | 1213 | self.tb = etb |
|
1214 | 1214 | ostream = self.ostream |
|
1215 | 1215 | ostream.flush() |
|
1216 | 1216 | ostream.write(self.text(etype, evalue, etb)) |
|
1217 | 1217 | ostream.write('\n') |
|
1218 | 1218 | ostream.flush() |
|
1219 | 1219 | |
|
1220 | 1220 | # Changed so an instance can just be called as VerboseTB_inst() and print |
|
1221 | 1221 | # out the right info on its own. |
|
1222 | 1222 | def __call__(self, etype=None, evalue=None, etb=None): |
|
1223 | 1223 | """This hook can replace sys.excepthook (for Python 2.1 or higher).""" |
|
1224 | 1224 | if etb is None: |
|
1225 | 1225 | self.handler() |
|
1226 | 1226 | else: |
|
1227 | 1227 | self.handler((etype, evalue, etb)) |
|
1228 | 1228 | try: |
|
1229 | 1229 | self.debugger() |
|
1230 | 1230 | except KeyboardInterrupt: |
|
1231 | 1231 | print("\nKeyboardInterrupt") |
|
1232 | 1232 | |
|
1233 | 1233 | |
|
1234 | 1234 | #---------------------------------------------------------------------------- |
|
1235 | 1235 | class FormattedTB(VerboseTB, ListTB): |
|
1236 | 1236 | """Subclass ListTB but allow calling with a traceback. |
|
1237 | 1237 | |
|
1238 | 1238 | It can thus be used as a sys.excepthook for Python > 2.1. |
|
1239 | 1239 | |
|
1240 | 1240 | Also adds 'Context' and 'Verbose' modes, not available in ListTB. |
|
1241 | 1241 | |
|
1242 | 1242 | Allows a tb_offset to be specified. This is useful for situations where |
|
1243 | 1243 | one needs to remove a number of topmost frames from the traceback (such as |
|
1244 | 1244 | occurs with python programs that themselves execute other python code, |
|
1245 | 1245 | like Python shells). """ |
|
1246 | 1246 | |
|
1247 | 1247 | def __init__(self, mode='Plain', color_scheme='Linux', call_pdb=False, |
|
1248 | 1248 | ostream=None, |
|
1249 | 1249 | tb_offset=0, long_header=False, include_vars=False, |
|
1250 | 1250 | check_cache=None, debugger_cls=None, |
|
1251 | 1251 | parent=None, config=None): |
|
1252 | 1252 | |
|
1253 | 1253 | # NEVER change the order of this list. Put new modes at the end: |
|
1254 | self.valid_modes = ['Plain', 'Context', 'Verbose'] | |
|
1254 | self.valid_modes = ['Plain', 'Context', 'Verbose', 'Minimal'] | |
|
1255 | 1255 | self.verbose_modes = self.valid_modes[1:3] |
|
1256 | 1256 | |
|
1257 | 1257 | VerboseTB.__init__(self, color_scheme=color_scheme, call_pdb=call_pdb, |
|
1258 | 1258 | ostream=ostream, tb_offset=tb_offset, |
|
1259 | 1259 | long_header=long_header, include_vars=include_vars, |
|
1260 | 1260 | check_cache=check_cache, debugger_cls=debugger_cls, |
|
1261 | 1261 | parent=parent, config=config) |
|
1262 | 1262 | |
|
1263 | 1263 | # Different types of tracebacks are joined with different separators to |
|
1264 | 1264 | # form a single string. They are taken from this dict |
|
1265 |
self._join_chars = dict(Plain='', Context='\n', Verbose='\n' |
|
|
1265 | self._join_chars = dict(Plain='', Context='\n', Verbose='\n', | |
|
1266 | Minimal='') | |
|
1266 | 1267 | # set_mode also sets the tb_join_char attribute |
|
1267 | 1268 | self.set_mode(mode) |
|
1268 | 1269 | |
|
1269 | 1270 | def _extract_tb(self, tb): |
|
1270 | 1271 | if tb: |
|
1271 | 1272 | return traceback.extract_tb(tb) |
|
1272 | 1273 | else: |
|
1273 | 1274 | return None |
|
1274 | 1275 | |
|
1275 | 1276 | def structured_traceback(self, etype, value, tb, tb_offset=None, number_of_lines_of_context=5): |
|
1276 | 1277 | tb_offset = self.tb_offset if tb_offset is None else tb_offset |
|
1277 | 1278 | mode = self.mode |
|
1278 | 1279 | if mode in self.verbose_modes: |
|
1279 | 1280 | # Verbose modes need a full traceback |
|
1280 | 1281 | return VerboseTB.structured_traceback( |
|
1281 | 1282 | self, etype, value, tb, tb_offset, number_of_lines_of_context |
|
1282 | 1283 | ) |
|
1284 | elif mode == 'Minimal': | |
|
1285 | return ListTB.get_exception_only(self, etype, value) | |
|
1283 | 1286 | else: |
|
1284 | 1287 | # We must check the source cache because otherwise we can print |
|
1285 | 1288 | # out-of-date source code. |
|
1286 | 1289 | self.check_cache() |
|
1287 | 1290 | # Now we can extract and format the exception |
|
1288 | 1291 | elist = self._extract_tb(tb) |
|
1289 | 1292 | return ListTB.structured_traceback( |
|
1290 | 1293 | self, etype, value, elist, tb_offset, number_of_lines_of_context |
|
1291 | 1294 | ) |
|
1292 | 1295 | |
|
1293 | 1296 | def stb2text(self, stb): |
|
1294 | 1297 | """Convert a structured traceback (a list) to a string.""" |
|
1295 | 1298 | return self.tb_join_char.join(stb) |
|
1296 | 1299 | |
|
1297 | 1300 | |
|
1298 | 1301 | def set_mode(self, mode=None): |
|
1299 | 1302 | """Switch to the desired mode. |
|
1300 | 1303 | |
|
1301 | 1304 | If mode is not specified, cycles through the available modes.""" |
|
1302 | 1305 | |
|
1303 | 1306 | if not mode: |
|
1304 | 1307 | new_idx = (self.valid_modes.index(self.mode) + 1 ) % \ |
|
1305 | 1308 | len(self.valid_modes) |
|
1306 | 1309 | self.mode = self.valid_modes[new_idx] |
|
1307 | 1310 | elif mode not in self.valid_modes: |
|
1308 | 1311 | raise ValueError('Unrecognized mode in FormattedTB: <' + mode + '>\n' |
|
1309 | 1312 | 'Valid modes: ' + str(self.valid_modes)) |
|
1310 | 1313 | else: |
|
1311 | 1314 | self.mode = mode |
|
1312 | 1315 | # include variable details only in 'Verbose' mode |
|
1313 | 1316 | self.include_vars = (self.mode == self.valid_modes[2]) |
|
1314 | 1317 | # Set the join character for generating text tracebacks |
|
1315 | 1318 | self.tb_join_char = self._join_chars[self.mode] |
|
1316 | 1319 | |
|
1317 | 1320 | # some convenient shortcuts |
|
1318 | 1321 | def plain(self): |
|
1319 | 1322 | self.set_mode(self.valid_modes[0]) |
|
1320 | 1323 | |
|
1321 | 1324 | def context(self): |
|
1322 | 1325 | self.set_mode(self.valid_modes[1]) |
|
1323 | 1326 | |
|
1324 | 1327 | def verbose(self): |
|
1325 | 1328 | self.set_mode(self.valid_modes[2]) |
|
1326 | 1329 | |
|
1330 | def minimal(self): | |
|
1331 | self.set_mode(self.valid_modes[3]) | |
|
1332 | ||
|
1327 | 1333 | |
|
1328 | 1334 | #---------------------------------------------------------------------------- |
|
1329 | 1335 | class AutoFormattedTB(FormattedTB): |
|
1330 | 1336 | """A traceback printer which can be called on the fly. |
|
1331 | 1337 | |
|
1332 | 1338 | It will find out about exceptions by itself. |
|
1333 | 1339 | |
|
1334 | 1340 | A brief example:: |
|
1335 | 1341 | |
|
1336 | 1342 | AutoTB = AutoFormattedTB(mode = 'Verbose',color_scheme='Linux') |
|
1337 | 1343 | try: |
|
1338 | 1344 | ... |
|
1339 | 1345 | except: |
|
1340 | 1346 | AutoTB() # or AutoTB(out=logfile) where logfile is an open file object |
|
1341 | 1347 | """ |
|
1342 | 1348 | |
|
1343 | 1349 | def __call__(self, etype=None, evalue=None, etb=None, |
|
1344 | 1350 | out=None, tb_offset=None): |
|
1345 | 1351 | """Print out a formatted exception traceback. |
|
1346 | 1352 | |
|
1347 | 1353 | Optional arguments: |
|
1348 | 1354 | - out: an open file-like object to direct output to. |
|
1349 | 1355 | |
|
1350 | 1356 | - tb_offset: the number of frames to skip over in the stack, on a |
|
1351 | 1357 | per-call basis (this overrides temporarily the instance's tb_offset |
|
1352 | 1358 | given at initialization time. """ |
|
1353 | 1359 | |
|
1354 | 1360 | if out is None: |
|
1355 | 1361 | out = self.ostream |
|
1356 | 1362 | out.flush() |
|
1357 | 1363 | out.write(self.text(etype, evalue, etb, tb_offset)) |
|
1358 | 1364 | out.write('\n') |
|
1359 | 1365 | out.flush() |
|
1360 | 1366 | # FIXME: we should remove the auto pdb behavior from here and leave |
|
1361 | 1367 | # that to the clients. |
|
1362 | 1368 | try: |
|
1363 | 1369 | self.debugger() |
|
1364 | 1370 | except KeyboardInterrupt: |
|
1365 | 1371 | print("\nKeyboardInterrupt") |
|
1366 | 1372 | |
|
1367 | 1373 | def structured_traceback(self, etype=None, value=None, tb=None, |
|
1368 | 1374 | tb_offset=None, number_of_lines_of_context=5): |
|
1369 | 1375 | if etype is None: |
|
1370 | 1376 | etype, value, tb = sys.exc_info() |
|
1371 | 1377 | self.tb = tb |
|
1372 | 1378 | return FormattedTB.structured_traceback( |
|
1373 | 1379 | self, etype, value, tb, tb_offset, number_of_lines_of_context) |
|
1374 | 1380 | |
|
1375 | 1381 | |
|
1376 | 1382 | #--------------------------------------------------------------------------- |
|
1377 | 1383 | |
|
1378 | 1384 | # A simple class to preserve Nathan's original functionality. |
|
1379 | 1385 | class ColorTB(FormattedTB): |
|
1380 | 1386 | """Shorthand to initialize a FormattedTB in Linux colors mode.""" |
|
1381 | 1387 | |
|
1382 | 1388 | def __init__(self, color_scheme='Linux', call_pdb=0, **kwargs): |
|
1383 | 1389 | FormattedTB.__init__(self, color_scheme=color_scheme, |
|
1384 | 1390 | call_pdb=call_pdb, **kwargs) |
|
1385 | 1391 | |
|
1386 | 1392 | |
|
1387 | 1393 | class SyntaxTB(ListTB): |
|
1388 | 1394 | """Extension which holds some state: the last exception value""" |
|
1389 | 1395 | |
|
1390 | 1396 | def __init__(self, color_scheme='NoColor', parent=None, config=None): |
|
1391 | 1397 | ListTB.__init__(self, color_scheme, parent=parent, config=config) |
|
1392 | 1398 | self.last_syntax_error = None |
|
1393 | 1399 | |
|
1394 | 1400 | def __call__(self, etype, value, elist): |
|
1395 | 1401 | self.last_syntax_error = value |
|
1396 | 1402 | |
|
1397 | 1403 | ListTB.__call__(self, etype, value, elist) |
|
1398 | 1404 | |
|
1399 | 1405 | def structured_traceback(self, etype, value, elist, tb_offset=None, |
|
1400 | 1406 | context=5): |
|
1401 | 1407 | # If the source file has been edited, the line in the syntax error can |
|
1402 | 1408 | # be wrong (retrieved from an outdated cache). This replaces it with |
|
1403 | 1409 | # the current value. |
|
1404 | 1410 | if isinstance(value, SyntaxError) \ |
|
1405 | 1411 | and isinstance(value.filename, str) \ |
|
1406 | 1412 | and isinstance(value.lineno, int): |
|
1407 | 1413 | linecache.checkcache(value.filename) |
|
1408 | 1414 | newtext = linecache.getline(value.filename, value.lineno) |
|
1409 | 1415 | if newtext: |
|
1410 | 1416 | value.text = newtext |
|
1411 | 1417 | self.last_syntax_error = value |
|
1412 | 1418 | return super(SyntaxTB, self).structured_traceback(etype, value, elist, |
|
1413 | 1419 | tb_offset=tb_offset, context=context) |
|
1414 | 1420 | |
|
1415 | 1421 | def clear_err_state(self): |
|
1416 | 1422 | """Return the current error state and clear it""" |
|
1417 | 1423 | e = self.last_syntax_error |
|
1418 | 1424 | self.last_syntax_error = None |
|
1419 | 1425 | return e |
|
1420 | 1426 | |
|
1421 | 1427 | def stb2text(self, stb): |
|
1422 | 1428 | """Convert a structured traceback (a list) to a string.""" |
|
1423 | 1429 | return ''.join(stb) |
|
1424 | 1430 | |
|
1425 | 1431 | |
|
1426 | 1432 | # some internal-use functions |
|
1427 | 1433 | def text_repr(value): |
|
1428 | 1434 | """Hopefully pretty robust repr equivalent.""" |
|
1429 | 1435 | # this is pretty horrible but should always return *something* |
|
1430 | 1436 | try: |
|
1431 | 1437 | return pydoc.text.repr(value) |
|
1432 | 1438 | except KeyboardInterrupt: |
|
1433 | 1439 | raise |
|
1434 | 1440 | except: |
|
1435 | 1441 | try: |
|
1436 | 1442 | return repr(value) |
|
1437 | 1443 | except KeyboardInterrupt: |
|
1438 | 1444 | raise |
|
1439 | 1445 | except: |
|
1440 | 1446 | try: |
|
1441 | 1447 | # all still in an except block so we catch |
|
1442 | 1448 | # getattr raising |
|
1443 | 1449 | name = getattr(value, '__name__', None) |
|
1444 | 1450 | if name: |
|
1445 | 1451 | # ick, recursion |
|
1446 | 1452 | return text_repr(name) |
|
1447 | 1453 | klass = getattr(value, '__class__', None) |
|
1448 | 1454 | if klass: |
|
1449 | 1455 | return '%s instance' % text_repr(klass) |
|
1450 | 1456 | except KeyboardInterrupt: |
|
1451 | 1457 | raise |
|
1452 | 1458 | except: |
|
1453 | 1459 | return 'UNRECOVERABLE REPR FAILURE' |
|
1454 | 1460 | |
|
1455 | 1461 | |
|
1456 | 1462 | def eqrepr(value, repr=text_repr): |
|
1457 | 1463 | return '=%s' % repr(value) |
|
1458 | 1464 | |
|
1459 | 1465 | |
|
1460 | 1466 | def nullrepr(value, repr=text_repr): |
|
1461 | 1467 | return '' |
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