Use packaging.version for package version checks

[pllim]

This line broke when pre-release is available (e.g., ipykernel==7.0.0a0):

solara/solara/server/kernel.py

Line 76 in eb8b827

ipykernel_version = tuple(map(int, ipykernel.__version__.split(".")))

>   ipykernel_version = tuple(map(int, ipykernel.__version__.split(".")))
E   ValueError: invalid literal for int() with base 10: '0a0'

If you switch to, say, packaging.version.Version check and take account of pre- or dev releases, then it would guard against such breakage.

Thanks.

[maartenbreddels]

Thanks, I didn't realize that was not a good pattern. I refrained from using any Python tooling because it was never clear to me what the best solution is. packaging seems to be a very large package that does more than providing packages.

importlib.metadata now seems to be the standard way (says chatgpt), but that is Python >= 3.8.

I do think we can make this more robust, thanks for the issue!

[pllim]

packaging or not, as long as you try to go for the officially supported pattern at https://peps.python.org/pep-0440/ , you should be good on the Python side.

[paddymul]

FWIW, packaging isn't available in jupyterlite xeus (maybe pyodide too).

My bug about this jupyterlite/pyodide-kernel#140