Test on Python 3.12

[jarrodmillman]

No description provided.

[rgommers]

To pick up the right numpy pre-release version, see numpy/numpy#23808 (comment) and PIP_PRE a few comments up from that.

[jarrodmillman]

The PIP_FLAGS variable wasn't being used. Setting CIBW_ENVIRONMENT didn't work. I also don't think the comment about 'numpy>=1.26.0b1; python_version>="3.12.0.rc1"', is true. Most of the other projects including scipy and pandas are using "numpy>=1.26.0b1; python_version>='3.12'", which seems to work fine in all the projects. If you see an instance where that doesn't work, let me know.

[jarrodmillman]

See matplotlib/matplotlib#26736. Also you may want to look at my comments about the version numbering. I suspect other projects are likely to be using the wrong numbering scheme, since I've seen other projects do similar things.

[jarrodmillman]

They are planning matplotlib 3.8 final release this week. That should simplify this PR, so we may want to wait for that release. But I am also happy merging this now and fixing things later.

[rgommers]

Most of the other projects including scipy and pandas are using "numpy>=1.26.0b1; python_version>='3.12'", which seems to work fine in all the projects.

Hmm, I thought it wouldn't - but maybe tools have special-cased Python version numbers now in a way that deviates from PEP 440 for convenience. If so, great - fewer things to tweak.

That should simplify this PR, so we may want to wait for that release. But I am also happy merging this now and fixing things later.

If you need a final release of pywavelets now to make life easier for scikit-image & co, then we can merge this now. Otherwise, maybe easier to wait? No strong preference from me.

[jarrodmillman]

Let's give it a few days and see how things progress. It would be good to have a pywt release early next week. I have a few more cleanup PRs I would like to make, so maybe we can get those in as well.

[rgommers]

I'm on holiday next week, so if you need it soon it may be useful to do the release by Friday. @grlee77 is that fine with you? Anything you'd like to get in?

[rgommers]

This all LGTM, works as advertised as far as I can tell. In it goes, thanks @jarrodmillman. And thanks for the review @cclauss.

[rgommers]

The numpy 1.26.0 release will be out today if things go as planned, so let's hold off on modifying the wheel build jobs to deal with pre-releases.