W503 reported only after E203 is ignored

[fuglede]

Consider the following simple file, let's call it test.py:

a = (
    2
    + 2
)

That is, something one might expect to find after running black. Here, pycodestyle test.py reports no errors. Now, ignore E203 (which is also common in the context of black), and we get the following output:

$ pycodestyle test.py --ignore E203
test.py:3:5: W503 line break before binary operator

This is on pycodestyle 2.6.0.

[asottile]

hopefully this part of the docs helps explain what you're seeing: https://github.com/PyCQA/pycodestyle/blame/a1b1f7c795ace4c186fd76ec6df994deb716cea8/docs/intro.rst#L434-L435

if you're using flake8 instead I'd suggest extend-ignore which preserves the default ignore list

[fuglede]

Yep, indeed it does; thanks!