/usr/lib/python3/dist-packages/celery/contrib/ is in python3-celery 4.1.0-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/celery/contrib/__init__.py
/usr/lib/python3/dist-packages/celery/contrib/abortable.py
/usr/lib/python3/dist-packages/celery/contrib/migrate.py
/usr/lib/python3/dist-packages/celery/contrib/pytest.py
/usr/lib/python3/dist-packages/celery/contrib/rdb.py
/usr/lib/python3/dist-packages/celery/contrib/sphinx.py
/usr/lib/python3/dist-packages/celery/contrib/testing/
/usr/lib/python3/dist-packages/celery/contrib/testing/__init__.py
/usr/lib/python3/dist-packages/celery/contrib/testing/app.py
/usr/lib/python3/dist-packages/celery/contrib/testing/manager.py
/usr/lib/python3/dist-packages/celery/contrib/testing/mocks.py
/usr/lib/python3/dist-packages/celery/contrib/testing/tasks.py
/usr/lib/python3/dist-packages/celery/contrib/testing/worker.py