[issue43923] Can't create generic NamedTuple as of py3.9

[Alex Waygood]

Alex Waygood <Alex.Waygood at Gmail.com> added the comment:

I agree with Jelle — a valid protocol cannot inherit from a concrete type, and the whole point of NamedTuple is that it creates a tuple subclass (and tuple is obviously a concrete type).

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43923>
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