[issue41559] Add support for PEP 612 (Parameter Specification Variables) to typing.py

[Ken Jin]

Ken Jin <kenjin4096 at gmail.com> added the comment:

The last of the patches have landed. Guido, thank you so much for helping me through this 5 month long process. Please enjoy your vacation!

PS: I need to send in a bugfix for typing.py later to ignore ``ParamSpec`` in the ``__parameters__`` of invalid locations like ``typing.List`` (this just ensures consistency with the builtin ``list``). That can be done as a bugfix patch after the 3.10 beta freeze (as it isn't a new feature at all). I'll open a new issue after beta 1 for that when you're back. Thanks!

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41559>
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