Mercurial > cpython-lru_cache-weakref

annotate Lib/traceback.py @ 39042:c02fa187e0f4 legacy-trunk

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Part of SF patch #1484695. This removes dead code. The chksum was already verified in .frombuf() on the lines above. If there was a problem an exception is raised, so there was no way this condition could have been true.
author Neal Norwitz <nnorwitz@gmail.com>
date Mon, 10 Jul 2006 00:23:17 +0000
parents bb3e0c889632
children 89e090fef985
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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6f4146846337 The third and final doc-string sweep by Ka-Ping Yee.
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1 """Extract, format and print information about Python stack traces."""
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2
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3 import linecache
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4 import sys
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5 import types
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6
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7 __all__ = ['extract_stack', 'extract_tb', 'format_exception',
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8 'format_exception_only', 'format_list', 'format_stack',
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9 'format_tb', 'print_exc', 'format_exc', 'print_exception',
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10 'print_last', 'print_stack', 'print_tb', 'tb_lineno']
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11
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12 def _print(file, str='', terminator='\n'):
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13 file.write(str+terminator)
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14
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15
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16 def print_list(extracted_list, file=None):
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17 """Print the list of tuples as returned by extract_tb() or
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18 extract_stack() as a formatted stack trace to the given file."""
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19 if file is None:
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20 file = sys.stderr
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21 for filename, lineno, name, line in extracted_list:
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22 _print(file,
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23 ' File "%s", line %d, in %s' % (filename,lineno,name))
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24 if line:
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25 _print(file, ' %s' % line.strip())
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26
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27 def format_list(extracted_list):
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28 """Format a list of traceback entry tuples for printing.
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29
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30 Given a list of tuples as returned by extract_tb() or
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31 extract_stack(), return a list of strings ready for printing.
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32 Each string in the resulting list corresponds to the item with the
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33 same index in the argument list. Each string ends in a newline;
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34 the strings may contain internal newlines as well, for those items
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35 whose source text line is not None.
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36 """
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37 list = []
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38 for filename, lineno, name, line in extracted_list:
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39 item = ' File "%s", line %d, in %s\n' % (filename,lineno,name)
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40 if line:
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41 item = item + ' %s\n' % line.strip()
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42 list.append(item)
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43 return list
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44
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45
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46 def print_tb(tb, limit=None, file=None):
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47 """Print up to 'limit' stack trace entries from the traceback 'tb'.
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48
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49 If 'limit' is omitted or None, all entries are printed. If 'file'
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50 is omitted or None, the output goes to sys.stderr; otherwise
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51 'file' should be an open file or file-like object with a write()
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52 method.
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53 """
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54 if file is None:
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55 file = sys.stderr
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56 if limit is None:
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57 if hasattr(sys, 'tracebacklimit'):
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58 limit = sys.tracebacklimit
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59 n = 0
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60 while tb is not None and (limit is None or n < limit):
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61 f = tb.tb_frame
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62 lineno = tb.tb_lineno
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63 co = f.f_code
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64 filename = co.co_filename
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65 name = co.co_name
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66 _print(file,
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67 ' File "%s", line %d, in %s' % (filename,lineno,name))
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68 linecache.checkcache(filename)
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69 line = linecache.getline(filename, lineno, f.f_globals)
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70 if line: _print(file, ' ' + line.strip())
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71 tb = tb.tb_next
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72 n = n+1
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73
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74 def format_tb(tb, limit = None):
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75 """A shorthand for 'format_list(extract_stack(f, limit))."""
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76 return format_list(extract_tb(tb, limit))
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77
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78 def extract_tb(tb, limit = None):
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79 """Return list of up to limit pre-processed entries from traceback.
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80
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81 This is useful for alternate formatting of stack traces. If
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82 'limit' is omitted or None, all entries are extracted. A
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83 pre-processed stack trace entry is a quadruple (filename, line
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84 number, function name, text) representing the information that is
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85 usually printed for a stack trace. The text is a string with
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86 leading and trailing whitespace stripped; if the source is not
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87 available it is None.
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88 """
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89 if limit is None:
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90 if hasattr(sys, 'tracebacklimit'):
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91 limit = sys.tracebacklimit
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92 list = []
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93 n = 0
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94 while tb is not None and (limit is None or n < limit):
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95 f = tb.tb_frame
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96 lineno = tb.tb_lineno
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97 co = f.f_code
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98 filename = co.co_filename
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99 name = co.co_name
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100 linecache.checkcache(filename)
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101 line = linecache.getline(filename, lineno, f.f_globals)
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102 if line: line = line.strip()
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103 else: line = None
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104 list.append((filename, lineno, name, line))
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105 tb = tb.tb_next
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106 n = n+1
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107 return list
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108
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109
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110 def print_exception(etype, value, tb, limit=None, file=None):
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111 """Print exception up to 'limit' stack trace entries from 'tb' to 'file'.
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112
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113 This differs from print_tb() in the following ways: (1) if
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114 traceback is not None, it prints a header "Traceback (most recent
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115 call last):"; (2) it prints the exception type and value after the
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116 stack trace; (3) if type is SyntaxError and value has the
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117 appropriate format, it prints the line where the syntax error
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118 occurred with a caret on the next line indicating the approximate
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119 position of the error.
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120 """
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121 if file is None:
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122 file = sys.stderr
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123 if tb:
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124 _print(file, 'Traceback (most recent call last):')
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125 print_tb(tb, limit, file)
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126 lines = format_exception_only(etype, value)
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127 for line in lines[:-1]:
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128 _print(file, line, ' ')
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129 _print(file, lines[-1], '')
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130
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131 def format_exception(etype, value, tb, limit = None):
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132 """Format a stack trace and the exception information.
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133
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134 The arguments have the same meaning as the corresponding arguments
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135 to print_exception(). The return value is a list of strings, each
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136 ending in a newline and some containing internal newlines. When
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137 these lines are concatenated and printed, exactly the same text is
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4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
138 printed as does print_exception().
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
139 """
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
140 if tb:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
141 list = ['Traceback (most recent call last):\n']
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
142 list = list + format_tb(tb, limit)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
143 else:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
144 list = []
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
145 list = list + format_exception_only(etype, value)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
146 return list
2901
57ec24e0f35a added format_* functions (suggestion by Ken M)
Guido van Rossum <guido@python.org>
parents: 2440
diff changeset
147
57ec24e0f35a added format_* functions (suggestion by Ken M)
Guido van Rossum <guido@python.org>
parents: 2440
diff changeset
148 def format_exception_only(etype, value):
17113
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
149 """Format the exception part of a traceback.
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
150
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
151 The arguments are the exception type and value such as given by
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
152 sys.last_type and sys.last_value. The return value is a list of
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
153 strings, each ending in a newline. Normally, the list contains a
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
154 single string; however, for SyntaxError exceptions, it contains
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
155 several lines that (when printed) display detailed information
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
156 about where the syntax error occurred. The message indicating
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
157 which exception occurred is the always last string in the list.
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
158 """
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
159 list = []
36751
8e04de2480e4 PEP 352 implementation. Creates a new base class, BaseException, which has an
Brett Cannon <bcannon@gmail.com>
parents: 33839
diff changeset
160 if (type(etype) == types.ClassType
38083
bb3e0c889632 Fix the formatting of KeyboardInterrupt -- a bad issubclass() call.
Guido van Rossum <guido@python.org>
parents: 37652
diff changeset
161 or (isinstance(etype, type) and issubclass(etype, BaseException))):
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
162 stype = etype.__name__
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
163 else:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
164 stype = etype
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
165 if value is None:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
166 list.append(str(stype) + '\n')
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
167 else:
37334
a4950ea556b5 traceback now shows error position for all SyntaxError subclasses,
Georg Brandl <georg@python.org>
parents: 37199
diff changeset
168 if issubclass(etype, SyntaxError):
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
169 try:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
170 msg, (filename, lineno, offset, line) = value
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
171 except:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
172 pass
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
173 else:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
174 if not filename: filename = "<string>"
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
175 list.append(' File "%s", line %d\n' %
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
176 (filename, lineno))
18067
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
177 if line is not None:
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
178 i = 0
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
179 while i < len(line) and line[i].isspace():
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
180 i = i+1
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
181 list.append(' %s\n' % line.strip())
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
182 if offset is not None:
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
183 s = ' '
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
184 for c in line[i:offset-1]:
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
185 if c.isspace():
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
186 s = s + c
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
187 else:
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
188 s = s + ' '
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
189 list.append('%s^\n' % s)
10992198c9d6 SF bug 431772: traceback.print_exc() causes traceback
Tim Peters <tim.peters@gmail.com>
parents: 17245
diff changeset
190 value = msg
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
191 s = _some_str(value)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
192 if s:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
193 list.append('%s: %s\n' % (str(stype), s))
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
194 else:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
195 list.append('%s\n' % str(stype))
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
196 return list
2901
57ec24e0f35a added format_* functions (suggestion by Ken M)
Guido van Rossum <guido@python.org>
parents: 2440
diff changeset
197
14116
92980920d5ed Patch by Toby Dickenson: don't die when an error occurs during string
Guido van Rossum <guido@python.org>
parents: 13620
diff changeset
198 def _some_str(value):
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
199 try:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
200 return str(value)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
201 except:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
202 return '<unprintable %s object>' % type(value).__name__
14116
92980920d5ed Patch by Toby Dickenson: don't die when an error occurs during string
Guido van Rossum <guido@python.org>
parents: 13620
diff changeset
203
1699
93df83022be8 New module, formats traceback just like the C code does
Guido van Rossum <guido@python.org>
parents:
diff changeset
204
3115
9497cdcdb6aa add file parameter to all printing fns, default stderr
Guido van Rossum <guido@python.org>
parents: 2901
diff changeset
205 def print_exc(limit=None, file=None):
17113
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
206 """Shorthand for 'print_exception(sys.exc_type, sys.exc_value, sys.exc_traceback, limit, file)'.
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
207 (In fact, it uses sys.exc_info() to retrieve the same information
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
208 in a thread-safe way.)"""
23628
ea979c5206b7 Replaced boolean tests with is None.
Raymond Hettinger <python@rcn.com>
parents: 18067
diff changeset
209 if file is None:
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
210 file = sys.stderr
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
211 try:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
212 etype, value, tb = sys.exc_info()
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
213 print_exception(etype, value, tb, limit, file)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
214 finally:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
215 etype = value = tb = None
1699
93df83022be8 New module, formats traceback just like the C code does
Guido van Rossum <guido@python.org>
parents:
diff changeset
216
30862
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
217
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
218 def format_exc(limit=None):
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
219 """Like print_exc() but return a string."""
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
220 try:
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
221 etype, value, tb = sys.exc_info()
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
222 return ''.join(format_exception(etype, value, tb, limit))
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
223 finally:
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
224 etype = value = tb = None
31389
aca1ce1b4b61 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 30862
diff changeset
225
30862
d45f8981fdea Add traceback.format_exc().
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 24844
diff changeset
226
3115
9497cdcdb6aa add file parameter to all printing fns, default stderr
Guido van Rossum <guido@python.org>
parents: 2901
diff changeset
227 def print_last(limit=None, file=None):
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
228 """This is a shorthand for 'print_exception(sys.last_type,
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
229 sys.last_value, sys.last_traceback, limit, file)'."""
23628
ea979c5206b7 Replaced boolean tests with is None.
Raymond Hettinger <python@rcn.com>
parents: 18067
diff changeset
230 if file is None:
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
231 file = sys.stderr
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
232 print_exception(sys.last_type, sys.last_value, sys.last_traceback,
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
233 limit, file)
4004
d3a1f6088c28 Added routines to print, format and extract the current, ``live'' stack.
Guido van Rossum <guido@python.org>
parents: 3640
diff changeset
234
d3a1f6088c28 Added routines to print, format and extract the current, ``live'' stack.
Guido van Rossum <guido@python.org>
parents: 3640
diff changeset
235
d3a1f6088c28 Added routines to print, format and extract the current, ``live'' stack.
Guido van Rossum <guido@python.org>
parents: 3640
diff changeset
236 def print_stack(f=None, limit=None, file=None):
17113
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
237 """Print a stack trace from its invocation point.
17245
0377f927cafa Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 17116
diff changeset
238
17113
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
239 The optional 'f' argument can be used to specify an alternate
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
240 stack frame at which to start. The optional 'limit' and 'file'
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
241 arguments have the same meaning as for print_exception().
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
242 """
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
243 if f is None:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
244 try:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
245 raise ZeroDivisionError
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
246 except ZeroDivisionError:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
247 f = sys.exc_info()[2].tb_frame.f_back
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
248 print_list(extract_stack(f, limit), file)
4004
d3a1f6088c28 Added routines to print, format and extract the current, ``live'' stack.
Guido van Rossum <guido@python.org>
parents: 3640
diff changeset
249
d3a1f6088c28 Added routines to print, format and extract the current, ``live'' stack.
Guido van Rossum <guido@python.org>
parents: 3640
diff changeset
250 def format_stack(f=None, limit=None):
17113
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
251 """Shorthand for 'format_list(extract_stack(f, limit))'."""
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
252 if f is None:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
253 try:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
254 raise ZeroDivisionError
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
255 except ZeroDivisionError:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
256 f = sys.exc_info()[2].tb_frame.f_back
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
257 return format_list(extract_stack(f, limit))
4004
d3a1f6088c28 Added routines to print, format and extract the current, ``live'' stack.
Guido van Rossum <guido@python.org>
parents: 3640
diff changeset
258
d3a1f6088c28 Added routines to print, format and extract the current, ``live'' stack.
Guido van Rossum <guido@python.org>
parents: 3640
diff changeset
259 def extract_stack(f=None, limit = None):
17113
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
260 """Extract the raw traceback from the current stack frame.
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
261
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
262 The return value has the same format as for extract_tb(). The
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
263 optional 'f' and 'limit' arguments have the same meaning as for
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
264 print_stack(). Each item in the list is a quadruple (filename,
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
265 line number, function name, text), and the entries are in order
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
266 from oldest to newest stack frame.
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
267 """
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
268 if f is None:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
269 try:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
270 raise ZeroDivisionError
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
271 except ZeroDivisionError:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
272 f = sys.exc_info()[2].tb_frame.f_back
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
273 if limit is None:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
274 if hasattr(sys, 'tracebacklimit'):
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
275 limit = sys.tracebacklimit
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
276 list = []
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
277 n = 0
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
278 while f is not None and (limit is None or n < limit):
24844
cf5928fab108 This is my patch
Michael W. Hudson <mwh@python.net>
parents: 23628
diff changeset
279 lineno = f.f_lineno
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
280 co = f.f_code
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
281 filename = co.co_filename
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
282 name = co.co_name
33839
4dd97c37c2cc SF #737473: Show up-to-date source code in tracebacks always.
Hye-Shik Chang <hyeshik@gmail.com>
parents: 31389
diff changeset
283 linecache.checkcache(filename)
37576
d11366f7e1e7 Updated the warnings, linecache, inspect, traceback, site, and doctest modules
Phillip J. Eby <pje@telecommunity.com>
parents: 37334
diff changeset
284 line = linecache.getline(filename, lineno, f.f_globals)
16499
58de2829cfdd String method conversion.
Eric S. Raymond <esr@thyrsus.com>
parents: 15873
diff changeset
285 if line: line = line.strip()
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
286 else: line = None
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
287 list.append((filename, lineno, name, line))
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
288 f = f.f_back
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
289 n = n+1
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
290 list.reverse()
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15848
diff changeset
291 return list
6337
9e429518cb20 Use Marc Lemburg's tb_lineno() to calculate the correct line number.
Guido van Rossum <guido@python.org>
parents: 5832
diff changeset
292
11707
6f4146846337 The third and final doc-string sweep by Ka-Ping Yee.
Guido van Rossum <guido@python.org>
parents: 7718
diff changeset
293 def tb_lineno(tb):
17113
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
294 """Calculate correct line number of traceback given in tb.
6337
9e429518cb20 Use Marc Lemburg's tb_lineno() to calculate the correct line number.
Guido van Rossum <guido@python.org>
parents: 5832
diff changeset
295
24844
cf5928fab108 This is my patch
Michael W. Hudson <mwh@python.net>
parents: 23628
diff changeset
296 Obsolete in 2.3.
17113
4863b595bdae Reformat and edit docstrings to follow modern conventions. Single
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16889
diff changeset
297 """
24844
cf5928fab108 This is my patch
Michael W. Hudson <mwh@python.net>
parents: 23628
diff changeset
298 return tb.tb_lineno