Is there a way to get flake8 to ignore only a specific rule for an entire file? Specifically, I'd like to ignore just F401 for an entire file.
I have a file like __init__.py where I import symbols that are never used within that file. I'd rather not add # noqa to each line. I can add # flake8: noqa to the beginning of the file, but that ignores all rules. I'd like to ignore just the F401 rule.
there is not currently a way to do what you're asking with only source inside the file itself
the current suggested way is to use the per-file-ignores feature in your flake8 configuration:
[flake8]
per-file-ignores =
*/__init__.py: F401
Note that F401 in particular can be solved in a better way, any names that are exposed in __all__ will be ignored by pyflakes:
from foo import bar # would potentially trigger F401
__all__ = ('bar',) # not any more!
(disclaimer: I'm the current maintainer of flake8 and one of the maintainers of pyflakes)