Python version limit and required libraries

[michael-petersen]

It looks like there is some >=Python 3.10 functionality scattered around. Starting a list here:

• examples/using_galpy/phase_slice.py with pairwise from itertools

Perhaps get around by requiring Python 3.10?

[michael-petersen]

Another dependency:

• from tqdm import tqdm. This one seems less strictly necessary -- perhaps make optional? Or add to requirements.
• astropy
• matplotlib? Though this is not strictly required and could be debated.
• h5py?

[michael-petersen]

It actually appears that >=Python 3.11 is required, specifically to support:

• @typing.dataclass_transform(), see documentation.

[ilikecubesnstuff]

• itertools.pairwise is used for Backend.iter_orbit_slices, which isn't yet used by the library - however, I have re-implemented it for now using itertools.tee (copying from the itertools documentation).
• typing.dataclass_transform is just a typing utility, I have removed it for Python-version backwards compatibility.
• Dependencies:
  • astropy is used for the Coordinate classes, I have added this to the package requirements.
  • Although tqdm isn't strictly necessary, I will add it to the requirements for now and add a note for removing it in a later commit.
  • h5py and matplotlib can be made as class-specific requirements, so using ExtendImports is a reasonable solution here. I think matplotlib should still be made a requirement since a big part of the analysis package's functionality depends on it.

I've addressed all but the last point in the latest commit.

[michael-petersen]

I think this is all solved now by various testing schemes and upgrades.