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Document and test the resolution of issue 3445 (tolerate missing attributes in functools.update_wrapper, previously implemented as a side effect of the __annotations__ copying patch) and implement issue 9567 (add a __wrapped__ attribute when using update_wrapper)

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Nick Coghlan 2010-08-17 06:17:18 +00:00
parent 632a0c1476
commit 9887683f74
4 changed files with 65 additions and 2 deletions
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9
Lib/functools.py
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@ -38,9 +38,14 @@ def update_wrapper(wrapper,
are updated with the corresponding attribute from the wrapped
function (defaults to functools.WRAPPER_UPDATES)
"""
wrapper.__wrapped__ = wrapped
for attr in assigned:
if hasattr(wrapped, attr):
setattr(wrapper, attr, getattr(wrapped, attr))
try:
value = getattr(wrapped, attr)
except AttributeError:
pass
else:
setattr(wrapper, attr, value)
for attr in updated:
getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
# Return the wrapper so this can be used as a decorator via partial()