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PEP 415: Implement suppression of __context__ display with an exception attribute

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This replaces the original PEP 409 implementation. See #14133.
This commit is contained in:
Benjamin Peterson 2012-05-14 22:09:31 -07:00
parent d91dc62379
commit d5a1c44455
12 changed files with 80 additions and 79 deletions
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13
Lib/traceback.py
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@ -119,15 +119,16 @@ def _iter_chain(exc, custom_tb=None, seen=None):
seen = set()
seen.add(exc)
its = []
context = exc.__context__
cause = exc.__cause__
if cause is Ellipsis:
context = exc.__context__
if context is not None and context not in seen:
its.append(_iter_chain(context, None, seen))
its.append([(_context_message, None)])
elif cause is not None and cause not in seen:
if cause is not None and cause not in seen:
its.append(_iter_chain(cause, False, seen))
its.append([(_cause_message, None)])
elif (context is not None and
not exc.__suppress_context__ and
context not in seen):
its.append(_iter_chain(context, None, seen))
its.append([(_context_message, None)])
its.append([(exc, custom_tb or exc.__traceback__)])
# itertools.chain is in an extension module and may be unavailable
for it in its: