/usr/lib/python3/dist-packages/flake8/ is in python3-flake8 2.1.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/flake8-2.1.0.egg-info/PKG-INFO
/usr/lib/python3/dist-packages/flake8-2.1.0.egg-info/dependency_links.txt
/usr/lib/python3/dist-packages/flake8-2.1.0.egg-info/entry_points.txt
/usr/lib/python3/dist-packages/flake8-2.1.0.egg-info/requires.txt
/usr/lib/python3/dist-packages/flake8-2.1.0.egg-info/top_level.txt
/usr/lib/python3/dist-packages/flake8/__init__.py
/usr/lib/python3/dist-packages/flake8/_pyflakes.py
/usr/lib/python3/dist-packages/flake8/engine.py
/usr/lib/python3/dist-packages/flake8/hooks.py
/usr/lib/python3/dist-packages/flake8/main.py
/usr/lib/python3/dist-packages/flake8/run.py
/usr/lib/python3/dist-packages/flake8/tests/
/usr/lib/python3/dist-packages/flake8/tests/__init__.py
/usr/lib/python3/dist-packages/flake8/tests/test_engine.py
/usr/lib/python3/dist-packages/flake8/util.py