https://gerrit.wikimedia.org/r/c/operations/software/python-poolcounter/+/683235 is throwing an error in pylint:
12:23:13 [152] /src$ /src/.tox/py35-tests/bin/flake8 setup.py poolcounter 12:23:13 poolcounter/ring.py:15:1: F401 'typing.List' imported but unused 12:23:13 poolcounter/ring.py:15:1: F401 'typing.Dict' imported but unused 12:23:13 poolcounter/client.py:6:1: F401 'typing.Dict' imported but unused 12:23:13 3 F401 'typing.Dict' imported but unused 12:23:13 ERROR: InvocationError for command /src/.tox/py35-tests/bin/flake8 setup.py poolcounter (exited with code 1)
However, these are false positives and the code already uses
from typing import Callable, Dict, Optional # pylint: disable=unused-import