Drop Python 3.9

[jacopoabramo]

Second attempt after #954

Closes #904

• Remove .pytest.ini
• Remove references to 3.9 in CI
• Use hooks to autoformat imports in kv.py
• Remove dependency on eval-type-backport for < 3.10
• Remove PY310_PLUS check

[jacopoabramo]

I don't think the falling test is due to this PR, right?

[ofek]

Indeed, it looks like uv is downloading the wrong Python for that architecture. I'll look into that tonight.

[ofek]

#959

[jacopoabramo]

@ofek it is a bit annoying that PRs require approval for executing the CI/CD workflows. I can understand this is a safety measure (don't really know why but I can appreciate the need for harder security). Do you think that this could be changed at some point? It would be useful for PRs to automatically run the tests suite to check whether there's a fail in the tests or not, and would help you catch a glimpse of possible failures yourself (as in the case of #954 where I abruptly closed the PR - which now I regret but what can one do).

[ofek]

I think CI runs automatically after someone's first PR is merged. I'm not an admin so I couldn't change the setting but I'll reach out to Jim about that.

[jacopoabramo]

I think CI runs automatically after someone's first PR is merged

Ah, if that's the case I can live with that!

[ofek]

Thanks!

[ofek]

as in the case of #954 where I abruptly closed the PR - which now I regret but what can one do

Feel free to reopen and get to the bottom of what's going on there, I'm quite curious as well!

[jacopoabramo]

Feel free to reopen and get to the bottom of what's going on there, I'm quite curious as well!

I will; I have to try and find some time where I can make a reasonable investigation but I'll get back to it at some point.