8000 ENH: Add `__class_getitem__` to `ndarray`, `dtype` and `number` by BvB93 · Pull Request #19879 · numpy/numpy · GitHub
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ENH: Add __class_getitem__ to ndarray, dtype and number #19879

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Merged
merged 10 commits into from
Sep 25, 2021
Merged

ENH: Add __class_getitem__ to ndarray, dtype and number #19879

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07124b5
ENH: Add `ndarray.__class_getitem__`
Jul 14, 2021
9ca8076
ENH: Add `number.__class_getitem__`
BvB93 Jul 28, 2021
d9f11f2
ENH: Add `dtype.__class_getitem__`
Aug 30, 2021
49f5358
DOC: Add a release note for `__class_getitem__`
Sep 15, 2021
0baeeb1
MAINT: Directly use `np.ndarray.__class_getitem__` for the definition…
BvB93 Sep 15, 2021
eba93e9
MAINT: Make `__class_getitem__` available to all python version and p…
Sep 16, 2021
f840f23
TST,DOC: Skip the `__class_getitem__` doctests for python 3.8
Sep 16, 2021
53b84fd
TST: Expand the `__class_getitem__` test coverage for python 3.8
BvB93 Sep 16, 2021
aecdb9f
DOC: Add links to the `__class_getitem__` docs
BvB93 Sep 16, 2021
8c89fef
ENH: Add special-casing for `complexfloating` so that it can take 2 p…
BvB93 Sep 18, 2021
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DOC: Add a release note for __class_getitem__
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Bas van Beek committed Sep 15, 2021
commit 49f53580e23bcf7dc305d97678125b34e1cff0cb
15 changes: 15 additions & 0 deletions doc/release/upcoming_changes/19879.new_feature.rst
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``ndarray``, ``dtype`` and ``number`` are now runtime-subscriptable
-------------------------------------------------------------------
Mimicking :pep:`585`, the `~numpy.ndarray`, `~numpy.dtype` and `~numpy.number`
classes are now subscriptable for python 3.9 and later.
Consequently, expressions that were previously only allowed in .pyi stub files
or with the help of ``from __future__ import annotations`` are now also legal
during runtime.

.. code-block:: python

>>> import numpy as np
>>> from typing import Any

>>> np.ndarray[Any, np.dtype[np.float64]]
numpy.ndarray[typing.Any, numpy.dtype[numpy.float64]]
0