Message 393373 - Python tracker

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Author	kj
Recipients	gvanrossum, kj, levkivskyi
Date	2021-05-10.09:41:35
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1620639695.98.0.0136931922016.issue44098@roundup.psfhosted.org>
In-reply-to

Content
``typing.List`` includes ``ParamSpec`` in ``__parameters__`` but the builtin ``list`` doesn't. The behavior of the latter is correct, as PEP 612 states that: "As before, parameters_expressions by themselves are not acceptable in places where a type is expected". https://www.python.org/dev/peps/pep-0612/#valid-use-locations This patch just makes the typing version same as the builtin version by excluding ``ParamSpec`` from ``__parameters__`` (except for Concatenate, Callable, and Generic).

``typing.List`` includes ``ParamSpec`` in ``__parameters__`` but the builtin ``list`` doesn't. The behavior of the latter is correct, as PEP 612 states that: "As before, parameters_expressions by themselves are not acceptable in places where a type is expected".

https://www.python.org/dev/peps/pep-0612/#valid-use-locations

This patch just makes the typing version same as the builtin version by excluding ``ParamSpec`` from ``__parameters__`` (except for Concatenate, Callable, and Generic).

History
Date	User	Action	Args
2021-05-10 09:41:36	kj	set	recipients: + kj, gvanrossum, levkivskyi
2021-05-10 09:41:35	kj	set	messageid: <1620639695.98.0.0136931922016.issue44098@roundup.psfhosted.org>
2021-05-10 09:41:35	kj	link	issue44098 messages
2021-05-10 09:41:35	kj	create