[issue46376] PyMapping_Check returns 1 for list

[Bar Harel]

Bar Harel <bzvi7919 at gmail.com> added the comment:

Another question we should ask is about duck typing. Is a sequence which doesn't inherit from abc.Sequence considered a sequence? Whatever the answer is, PySequence specifically looks for a sequence and removes duck typing out of the picture. The object will not pass static typing and will not pass isinstance check, so there's no reason for it to pass PySequence.

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<https://bugs.python.org/issue46376>
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