Mailman 3 Type annotation for slice - Typing-sig

11 Dec 2020

      (it is formerly discussed in https://discuss.python.org/t/is-it-a-good-practice-to-pass-tuple-of-slice-to... )

Currently we cannot write type annotation for slice like `slice[str, str]`.

And it is useful when write something like `a["C1":"C2"]` , which is used in pandas already.

And I also want to write something like `a[(1,2):4,(5,6):9]` which type could be `tuple[slice[tuple[int, int], int, None], ...]`

So I think it would be better if slice support type annotation

Type annotation for slice

Hao Zhang

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