How to format this code so that flake8 is happy? - flake8

Question

This code was created by black:
def test_schema_org_script_from_list():
assert (
schema_org_script_from_list([1, 2])
== '<script type="application/ld+json">1</script>\n<script type="application/ld+json">2</script>'
)
But now flake8 complains:
tests/test_utils.py:59:9: W503 line break before binary operator
tests/test_utils.py:59:101: E501 line too long (105 > 100 characters)
How can I format above lines and make flake8 happy?
I use this .pre-commit-config.yaml
# See https://pre-commit.com for more information
# See https://pre-commit.com/hooks.html for more hooks
repos:
- repo: 'https://github.com/pre-commit/pre-commit-hooks'
rev: v3.2.0
hooks:
- id: trailing-whitespace
- id: end-of-file-fixer
- id: check-yaml
- id: check-added-large-files
- repo: 'https://gitlab.com/pycqa/flake8'
rev: 3.8.4
hooks:
- id: flake8
- repo: 'https://github.com/pre-commit/mirrors-isort'
rev: v5.7.0
hooks:
- id: isort
tox.ini:
[flake8]
max-line-length = 100
exclude = .git,*/migrations/*,node_modules,migrate
# W504 line break after binary operator
ignore = W504
(I think it is a bit strange that flake8 reads config from a file which belongs to a different tool).

Answer 1

from your configuration, you've set ignore = W504
ignore isn't the option you want as it resets the default ignore (bringing in a bunch of things, including W503).
If you remove ignore=, both W504 and W503 are in the default ignore so they won't be caught
as for your E501 (line too long), you can either extend-ignore = E501 or you can set max-line-length appropriately
for black, this is the suggested configuration:
[flake8]
max-line-length = 88
extend-ignore = E203
note that there are cases where black cannot make a line short enough (as you're seeing) -- both from long strings and from long variable names
disclaimer: I'm the current flake8 maintainer