[issue33217] x in enum.Flag() is True when x is no Flag

[Ethan Furman]

Ethan Furman <ethan at stoneleaf.us> added the comment:

Strings are actually the odd-man out -- dicts, sets, lists, tuples, etc., all return False instead of raising TypeError.

The reason str raises an error is because `in`, for str, is a substring check, not a membership check.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33217>
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