[issue33315] Allow queue.Queue to be used in type annotations

[Semyon Proshev]

Semyon Proshev <s-proshev at ya.ru> added the comment:

I had been thinking about `__class_getitem__` when the issue were created.

I suspected it's not difficult to implement and it follows PEP 560.
So I'm +1 for `__class_item__`, quotes and postponed evaluation are also ok.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33315>
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