pip install flake8-obey-import-goat

# foo.py
from datetime import datetime
from typing import Optional

def foo():
    pass


# users/bar.py
from foo import foo

# setup.cfg
[flake8]
forbidden-imports =
    *: datetime.datetime, stdlib modules should be imported as a module
    *: typing.Optional, we use T | None instead of Optional[T]
    users.*: foo.*, users module should not use foo module

$ flake8 test.py
foo.py:1:1: OIG001 datetime.datetime is forbidden, since stdlib modules should be imported as a module.
foo.py:2:1: OIG001 typing.Optional is forbidden, since we use T | None instead of Optional[T].
users/bar.py:1:1: OIG001 foo.foo import is forbidden is forbidden, since users module should not use foo module.