CI: Start Testing on Python 3.11

[lithomas1]

• xref ENH: Support Python 3.11 #46680 (Replace xxxx with the Github issue number)
• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.
• Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

It's that time of the year again.

Surprisingly, there are not a lot of failures this year.

[EwoutH]

Thanks for the effort!

Cython 0.29.29 and 0.29.30 were released and NumPy bumped their Cython requirement on the main branch, so I think if you rebase this (and thereby trigger the CI again), it will come a bit further.

[lithomas1]

I think we already picked up 0.29.29 here(it compiles fine). I can try again with 0.29.30, but sadly these test failures look real.

[EwoutH]

If you combine those four lines to a single line with (Timestamp, Timedelta),, it conforms to black formatting and the linting error will go away (see the CI run).

-    (
-        Timestamp,
-        Timedelta
-    ),
+    (Timestamp, Timedelta),

[EwoutH]

@lithomas1 Any progress on this effort? Should we open issues for the test failures?

[lithomas1]

@EwoutH No, they are mainly because an error message changed, and so should be relatively easy to fix. Does anyone downstream need this(can prioritize this if so)?

I'm a bit short on time right now, so I'll be squeezing in commits here and there, but it might take me a while to fix up all the tests.

You might also want to hold off reviewing right now, as there are going to be a lot of WIP commits, and I don't want to waste your time reviewing. I can ping you when this is ready.

[lithomas1]

@github-actions pre-commit

[lithomas1]

@github-actions pre-commit

[github-actions]

This pull request is stale because it has been open for thirty days with no activity. Please update and respond to this comment if you're still interested in working on this.

[EwoutH]

@lithomas1 Thanks for the effort so far. Are you still working on this?

[lithomas1]

This PR is currently superseded by #47442. That PR is still blocked by #47467. I expect to finish up #47467 and get it merged within the next week.