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import re |
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2
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import sys |
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3
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from types import CodeType |
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4
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from types import TracebackType |
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5
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6
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try: |
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from __pypy__ import tproxy |
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except ImportError: |
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tproxy = None |
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try: |
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from .cpython import tb_set_next |
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except ImportError: |
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tb_set_next = None |
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if not tb_set_next and not tproxy: |
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raise ImportError("Cannot use tblib. Runtime not supported.") |
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__version__ = '1.3.0' |
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__all__ = 'Traceback', |
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21
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PY3 = sys.version_info[0] == 3 |
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FRAME_RE = re.compile(r'^\s*File "(?P<co_filename>.+)", line (?P<tb_lineno>\d+)(, in (?P<co_name>.+))?$') |
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24
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class _AttrDict(dict): |
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__slots__ = () |
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__getattr__ = dict.__getitem__ |
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# noinspection PyPep8Naming |
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class __traceback_maker(Exception): |
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pass |
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class TracebackParseError(Exception): |
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pass |
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class Code(object): |
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def __init__(self, code): |
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self.co_filename = code.co_filename |
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self.co_name = code.co_name |
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class Frame(object): |
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def __init__(self, frame): |
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self.f_globals = dict([ |
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(k, v) |
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for k, v in frame.f_globals.items() |
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if k in ("__file__", "__name__") |
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]) |
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self.f_code = Code(frame.f_code) |
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54
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class Traceback(object): |
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def __init__(self, tb): |
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self.tb_frame = Frame(tb.tb_frame) |
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# noinspection SpellCheckingInspection |
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self.tb_lineno = int(tb.tb_lineno) |
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if tb.tb_next is None: |
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self.tb_next = None |
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else: |
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self.tb_next = Traceback(tb.tb_next) |
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65
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def as_traceback(self): |
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if tproxy: |
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return tproxy(TracebackType, self.__tproxy_handler) |
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elif tb_set_next: |
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f_code = self.tb_frame.f_code |
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code = compile('\n' * (self.tb_lineno - 1) + 'raise __traceback_maker', self.tb_frame.f_code.co_filename, 'exec') |
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if PY3: |
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code = CodeType( |
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0, code.co_kwonlyargcount, |
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code.co_nlocals, code.co_stacksize, code.co_flags, |
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code.co_code, code.co_consts, code.co_names, code.co_varnames, |
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f_code.co_filename, f_code.co_name, |
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code.co_firstlineno, code.co_lnotab, (), () |
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) |
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else: |
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code = CodeType( |
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0, |
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code.co_nlocals, code.co_stacksize, code.co_flags, |
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code.co_code, code.co_consts, code.co_names, code.co_varnames, |
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f_code.co_filename.encode(), f_code.co_name.encode(), |
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code.co_firstlineno, code.co_lnotab, (), () |
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86
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) |
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87
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88
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# noinspection PyBroadException |
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89
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try: |
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90
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exec(code, self.tb_frame.f_globals, {}) |
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except: |
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tb = sys.exc_info()[2].tb_next |
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93
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tb_set_next(tb, self.tb_next and self.tb_next.as_traceback()) |
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return tb |
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95
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else: |
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96
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raise RuntimeError("Cannot re-create traceback !") |
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97
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98
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# noinspection SpellCheckingInspection |
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def __tproxy_handler(self, operation, *args, **kwargs): |
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if operation in ('__getattribute__', '__getattr__'): |
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if args[0] == 'tb_next': |
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return self.tb_next and self.tb_next.as_traceback() |
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103
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else: |
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104
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return getattr(self, args[0]) |
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105
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else: |
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106
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return getattr(self, operation)(*args, **kwargs) |
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107
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108
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def to_dict(self): |
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109
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"""Convert a Traceback into a dictionary representation""" |
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110
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if self.tb_next is None: |
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tb_next = None |
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112
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else: |
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113
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tb_next = self.tb_next.to_dict() |
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114
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115
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code = { |
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116
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'co_filename': self.tb_frame.f_code.co_filename, |
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117
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'co_name': self.tb_frame.f_code.co_name, |
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118
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} |
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119
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frame = { |
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120
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'f_globals': self.tb_frame.f_globals, |
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121
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'f_code': code, |
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122
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} |
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123
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return { |
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'tb_frame': frame, |
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125
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'tb_lineno': self.tb_lineno, |
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126
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'tb_next': tb_next, |
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127
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} |
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128
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129
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@classmethod |
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130
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def from_dict(cls, dct): |
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131
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if dct['tb_next']: |
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132
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tb_next = cls.from_dict(dct['tb_next']) |
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133
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else: |
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134
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tb_next = None |
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135
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136
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code = _AttrDict( |
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137
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co_filename=dct['tb_frame']['f_code']['co_filename'], |
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138
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co_name=dct['tb_frame']['f_code']['co_name'], |
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139
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) |
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140
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frame = _AttrDict( |
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141
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f_globals=dct['tb_frame']['f_globals'], |
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142
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f_code=code, |
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143
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) |
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144
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tb = _AttrDict( |
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145
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tb_frame=frame, |
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146
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tb_lineno=dct['tb_lineno'], |
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147
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tb_next=tb_next, |
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148
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) |
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149
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return cls(tb) |
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150
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151
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@classmethod |
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152
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def from_string(cls, string, strict=True): |
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153
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frames = [] |
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154
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header = strict |
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155
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156
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for line in string.splitlines(): |
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157
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line = line.rstrip() |
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158
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if header: |
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159
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if line == 'Traceback (most recent call last):': |
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160
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header = False |
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161
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continue |
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162
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frame_match = FRAME_RE.match(line) |
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163
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if frame_match: |
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164
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frames.append(frame_match.groupdict()) |
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165
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elif line.startswith(' '): |
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166
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pass |
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167
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elif strict: |
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168
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break # traceback ended |
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169
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170
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if frames: |
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171
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previous = None |
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172
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for frame in reversed(frames): |
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173
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previous = _AttrDict( |
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174
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frame, |
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175
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tb_frame=_AttrDict( |
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176
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frame, |
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177
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f_globals=_AttrDict( |
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178
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__file__=frame['co_filename'], |
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179
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__name__='?', |
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180
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), |
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181
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f_code=_AttrDict(frame), |
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182
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), |
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183
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tb_next=previous, |
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184
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) |
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185
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return cls(previous) |
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186
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else: |
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187
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raise TracebackParseError("Could not find any frames in %r." % string) |
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188
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|
ionelmc /
python-tblib
