Mismatch with flake8

[Mofef]

I never really spend any thoughts on linting, I rather accepted that it was there, only since Charlies webinar with jetbrains I became interested and since I suggested to give ruff a try in our projects. Just as a disclaimer, most likely i'm just making a stupid mistake....

With this aside, what is the issue? As far as I understand flake8 and ruff should be pretty much consistent, but we found this:

(venv) moritz@VirtualBox:~/PycharmProjects/b.series$ flake8 bseries/
bseries/.....py:57:21: E225 missing whitespace around operator
bseries/.....py:170:41: E231 missing whitespace after ':'
bseries/.....py:7:1: E302 expected 2 blank lines, found 1
bseries/.....py:19:22: E127 continuation line over-indented for visual indent
(venv) moritz@VirtualBox:~/PycharmProjects/b.series$ ruff bseries/
(venv) moritz@VirtualBox:~/PycharmProjects/b.series$ 

are those just not implemented yet?

here is the snippet regarding the first flake8 error: (last line)

    def __getitem__(self, item):
        if not isinstance(item, slice):
            if isinstance(item, str):
                item=[item] 

(venv) moritz@VirtualBox:~/PycharmProjects/b.series$ ruff --version
ruff 0.0.246

pyproject.toml:

[tool.ruff]
select = ["E", "F", "I", "W"]
line-length = 120

setup.cfg

[flake8]
max-line-length = 120
extend-ignore = E203

[JonathanPlasse]

These checks from flake8 are not yet available in Ruff.
It was not implemented as Black can fix these errors automatically.

[charliermarsh]

Yup that's right! We haven't finished implementing those "stylistic" rules from Flake8, but we've made a bunch of progress on them.

If you try with a snippet like:

import os

def f():
  x = 1

You should see unused import and unused variable errors in both Flake8 and Ruff.

Thanks for giving Ruff a try :)

[Mofef]

Awesome, thx for the heads up! Is there an easy way to check if rules are / are not implemented yet?

[charliermarsh]

We're missing 13 rules (#2402), however some of the rules that are checked off in that issue are still behind a flag and not yet available in the release (coming soon).

So the place to look would be the E list in the docs, which you can compare to pycodestyle's own list. Sorry, I know it's not "easy" to compare those two sources!

[Mofef]

Easy enough! 🚀 Thank you so much!