flake8-forbidden-func

An extension for flake8 that forbids some functions in some modules.

Installation

pip install flake8-forbidden-func

Example

# users/views.py
from users import User
import datetime


def test_view():
    print(datetime.datetime.now())
    faz = User.objects.all().annotate().filter(a=2)
    baz = bar_func()

    if faz == baz:
        fuz = q.filter(a=1)
        return fuz.bar()

# setup.cfg
[flake8]
forbidden-functions =
    *.views: *.filter, views module should not use ORM filter
    *: datetime.datetime.now, we use django utils
allowed-functions =
    *.selectors: *.objects.*, only selectors module should use ORM

Usage:

$ flake8 users/views.py
users/views.py:6:11: CFF001 datetime.datetime.now call is forbidden,since we use django utils.
users/views.py:7:11: CFF001 *.objects.* call is forbidden, since only selectors module should use ORM.
users/views.py:7:11: CFF001 *.objects.* call is forbidden, since only selectors module should use ORM.
users/views.py:7:11: CFF001 *.objects.* call is forbidden, since only selectors module should use ORM.
users/views.py:11:15: CFF001 *.filter call is forbidden, since views module should not use ORM filter.

Tested on Python 3.7+ and flake8 4.0+.

Error codes

Error code	Description
CFF001	call is forbidden, since reason
CFF000	happens when we get unhandled exception during the linting process