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Author ncoghlan
Recipients ncoghlan
Date 2013-03-19.17:35:42
SpamBayes Score -1.0
Marked as misclassified Yes
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functools.update_wrapper inadvertently overwrites the just set __wrapped__ attribute when it updates the contents of __dict__.

This means the intended __wrapped__ chain is never created - instead, for every function in a wrapper stack, __wrapped__ will always refer to the innermost function.

This means that using __wrapped__ to bypass functools.lru_cache doesn't work correctly if the decorated function already has __wrapped__ set.

Explicitly setting __signature__ fortunately still works correctly, since that is checked before recursing down through __wrapped__ in inspect.signature.
Date User Action Args
2013-03-19 17:35:42ncoghlansetrecipients: + ncoghlan
2013-03-19 17:35:42ncoghlansetmessageid: <>
2013-03-19 17:35:42ncoghlanlinkissue17482 messages
2013-03-19 17:35:42ncoghlancreate