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Merge pull request #1398 from minrk/tb_syntaxerror...
Merge pull request #1398 from minrk/tb_syntaxerror fix %tb after SyntaxError Moves exc_info extraction to Shell._get_exc_info, since it was done twice in different places, and differently. Synchronizes expectations between showtraceback() and showsyntaxerror(), and ensures that sys.last_type, etc. get the right value. Previously failing test added.

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r4755:c14b594e
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nested_context.py
50 lines | 1.5 KiB | text/x-python | PythonLexer
Thomas Kluyver
Backwards compatibility hack to use nested() in Python 3.2
r4751 """Backwards compatibility - we use contextlib.nested to support Python 2.6,
but it's removed in Python 3.2."""
# TODO : Remove this once we drop support for Python 2.6, and use
# "with a, b:" instead.
Thomas Kluyver
Fix for nested()
r4755 import sys
Thomas Kluyver
Backwards compatibility hack to use nested() in Python 3.2
r4751 from contextlib import contextmanager
@contextmanager
def nested(*managers):
"""Combine multiple context managers into a single nested context manager.
This function has been deprecated in favour of the multiple manager form
of the with statement.
The one advantage of this function over the multiple manager form of the
with statement is that argument unpacking allows it to be
used with a variable number of context managers as follows:
with nested(*managers):
do_something()
"""
exits = []
vars = []
exc = (None, None, None)
try:
for mgr in managers:
exit = mgr.__exit__
enter = mgr.__enter__
vars.append(enter())
exits.append(exit)
yield vars
except:
exc = sys.exc_info()
finally:
while exits:
exit = exits.pop()
try:
if exit(*exc):
exc = (None, None, None)
except:
exc = sys.exc_info()
if exc != (None, None, None):
# Don't rely on sys.exc_info() still containing
# the right information. Another exception may
# have been raised and caught by an exit method
raise exc[0], exc[1], exc[2]