Python 3.12 support

[BrianJKoopman]

I wanted to open an issue to discuss building Python 3.12 wheels, selfishly because I just updated my personal system to 3.12. Any anticipated issues?

I'd expect at the same time we'd drop 3.7 support, as that's at end-of-life.

When we do this can we also update the compatibility list on PyPI here:

so3g/setup.py

Lines 414 to 416 in 51a8ae3

	"Programming Language :: Python :: 3.7",
	"Programming Language :: Python :: 3.8",
	"Programming Language :: Python :: 3.9",

[tskisner]

The last time I investigated this for other packages, there were still some core astro dependencies that were not yet available. That was a few months ago, and it may be that so3g has fewer such dependencies. So it might just work...

[mhasself]

pixell does not yet support 3.12. Keep an eye here.

[BrianJKoopman]

It seems with the release of pixell v0.25.0/v0.26.0 it now supports 3.12.

[kmharrington]

Soooo... can we talk again about 3.12?

[tskisner]

Until this morning, I thought the hold-up was boost python requiring numpy-1.x, and python-3.12 requiring numpy-2.x. This means waiting until the next boost release in December to get numpy-2 (and hence python-3.12) support. However, Josh mentioned this morning that after some uproar numpy-1.26 works with python-3.12. So maybe there is no holdup. I'm in the middle of a substantial overhaul in #192, so I can try to build wheels for 3.12 as part of that. I've also tried to enable wheels on macos arm64.