Use ruff instead of flake8 for linting

[rohanbabbar04]

Use ruff instead of flake8

• It's faster than flake8
• Linting is better with ruff

[mrava87]

Hello,
I am not sure about changing something we used for long time and are satisfied with. @cako is currently away, once he is back at work he can give us his opinion as he introduced flake8 support to pylops.

[cako]

I think ruff has a lot of potential, but I am hesitant port over to it right now for two reasons:

1. Ruff does not support pattern matching. The fix for this should be coming soon.
2. Ruff does not flag errors which are fixed by black. I understand we are using black as a pre-commit hook, but pre-commit hooks are not mandatory and can be bypassed. I would hate to be missing linting suggestions because someone at some point did not use black.

For those reasons I would rather wait until ruff becomes more mature before moving the whole project over to it. I am closing this issue as wontfix for now.

[cako]

@mrava87 Ruff has made a lot of progress in this year. I've been using it almost exclusively for new projects. It's crazy fast! I think once they close these issues, we should think about migrating to it.

astral-sh/ruff#2402

astral-sh/ruff#5188

[mrava87]

Sounds like a good plan! I haven't followed much but I trust you, just shout when you think is time :)