importlib.abc: NameError: name 'warnings' is not defined

[hroncok]

Bug report

Bug description:

>>> import importlib.abc
>>> importlib.abc.TraversableResources
Traceback (most recent call last):
 File "<python-input-3>", line 1, in <module>
 importlib.abc.TraversableResources
 File "/usr/lib64/python3.13/importlib/abc.py", line 34, in __getattr__
 warnings._deprecated(f"{__name__}.{name}", remove=(3, 14))
 ^^^^^^^^
NameError: name 'warnings' is not defined. Did you mean: 'Warning'? Or did you forget to import 'warnings'?

This is a result of #120429

Thew change on the main branch correctly removed unused import warnings, but ti got backported to 3.13 where the import is used.

CPython versions tested on:

3.13

Operating systems tested on:

Linux

Linked PRs

• [3.13] gh-121279: Re-add prematurely removed import warnings to importlib.abc #121281
• [3.13] gh-121279: Fix importlib DeprecatedAttrsTests #121319

[hroncok]

Working on a PR.

[vstinner]

Fixed by dacf4ff.

[encukou]

The fix fails in refleaks buildbots:

• https://buildbot.python.org/all/#/builders/1396/builds/229/steps/5/logs/stdio
• https://buildbot.python.org/all/#/builders/1431/builds/205

Reproducible with:

./python -m test test_importlib -m 'test_deprecated*' -R:

[hroncok]

The failure is AssertionError: DeprecationWarning not triggered

I assume that when the test runs multiple times, the DeprecationWarning is no longer triggered. I would need to see how other tests do this.

[vstinner]

The fix fails in refleaks buildbots:

I propose a fix for that: #121319