numpy / numpy/numtype

change the `datetime64` and `timedelta64` type-parameter default to `Any`

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blame: Mypy numpy.generic stubs: Enhancement
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Python
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Description

This was suggested by @randolf-scholz in https://github.com/numpy/numpy/issues/28257#issuecomment-2646551727. It might accidentally cause breaking changes for mypy users (see https://github.com/numpy/numpy/issues/28257#issuecomment-2646563705). So it's best to implement this in numpy-stubs instead (which we plan to merge into numpy at some point).

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the numpy-stubs definitions for the datetime64 and timedelta64 type parameters, then review the linked NumPy issue discussion for the intended typing behavior and compatibility concern. Done means the defaults are changed to Any in the stubs without introducing the proposed breaking change for mypy users.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
tooling
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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