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from __future__ import absolute_import
import inspect
import traceback
import bb.namedtuple_with_abc
from collections import namedtuple
class TracebackEntry(namedtuple.abc):
"""Pickleable representation of a traceback entry"""
_fields = 'filename lineno function args code_context index'
_header = ' File "{0.filename}", line {0.lineno}, in {0.function}{0.args}'
def format(self, formatter=None):
if not self.code_context:
return self._header.format(self) + '\n'
formatted = [self._header.format(self) + ':\n']
for lineindex, line in enumerate(self.code_context):
if formatter:
line = formatter(line)
if lineindex == self.index:
formatted.append(' >%s' % line)
else:
formatted.append(' %s' % line)
return formatted
def __str__(self):
return ''.join(self.format())
def extract_traceback(tb, context=1):
frames = inspect.getinnerframes(tb, context)
for frame, filename, lineno, function, code_context, index in frames:
args = inspect.formatargvalues(*inspect.getargvalues(frame))
yield TracebackEntry(filename, lineno, function, args, code_context, index)
def format_extracted(extracted, formatter=None, limit=None):
if limit:
extracted = extracted[-limit:]
formatted = []
for tracebackinfo in extracted:
formatted.extend(tracebackinfo.format(formatter))
return formatted
def format_exception(etype, value, tb, context=1, limit=None, formatter=None):
formatted = ['Traceback (most recent call last):\n']
if hasattr(tb, 'tb_next'):
tb = extract_traceback(tb, context)
formatted.extend(format_extracted(tb, formatter, limit))
formatted.extend(traceback.format_exception_only(etype, value))
return formatted
def to_string(exc):
if isinstance(exc, SystemExit):
if not isinstance(exc.code, basestring):
return 'Exited with "%d"' % exc.code
return str(exc)
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