[issue31254] WeakKeyDictionary/Mapping doesn't call __missing__

[Antony Lee]

Antony Lee added the comment:

The original example did not cover the use case and was only there to show the current behavior.  The real use case is more something like

obj = (get obj as argument to function, caller has a hard reference to it)
uid = d[obj]

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue31254>
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