[issue31254] WeakKeyDictionary/Mapping doesn't call __missing__

[Antony Lee]

Antony Lee added the comment:

Thanks for the clarification!

"at least if the original key is not `obj` but some other object equal to `obj`" does not apply in my case so I'm fine, but the example shows that this is tricky to get right...

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