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Issue #8814: function annotations (the __annotations__ attribute)

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are now included in the set of attributes copied by default by
functools.wraps and functools.update_wrapper.  Patch by Terrence Cole.
This commit is contained in:
Antoine Pitrou 2010-08-04 18:28:02 +00:00
parent 5626eec0c2
commit 560f7647ce
5 changed files with 17 additions and 7 deletions
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5
Lib/functools.py
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@ -19,7 +19,7 @@ from operator import itemgetter
# update_wrapper() and wraps() are tools to help write
# wrapper functions that can handle naive introspection
WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__')
WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__', '__annotations__')
WRAPPER_UPDATES = ('__dict__',)
def update_wrapper(wrapper,
wrapped,
@ -37,7 +37,8 @@ def update_wrapper(wrapper,
function (defaults to functools.WRAPPER_UPDATES)
"""
for attr in assigned:
setattr(wrapper, attr, getattr(wrapped, attr))
if hasattr(wrapped, attr):
setattr(wrapper, attr, getattr(wrapped, attr))
for attr in updated:
getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
# Return the wrapper so this can be used as a decorator via partial()