/usr/lib/python3/dist-packages/traitlets/config/ is in python3-traitlets 4.3.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/traitlets/config/__init__.py
/usr/lib/python3/dist-packages/traitlets/config/application.py
/usr/lib/python3/dist-packages/traitlets/config/configurable.py
/usr/lib/python3/dist-packages/traitlets/config/loader.py
/usr/lib/python3/dist-packages/traitlets/config/manager.py
/usr/lib/python3/dist-packages/traitlets/config/tests/
/usr/lib/python3/dist-packages/traitlets/config/tests/__init__.py
/usr/lib/python3/dist-packages/traitlets/config/tests/test_application.py
/usr/lib/python3/dist-packages/traitlets/config/tests/test_configurable.py
/usr/lib/python3/dist-packages/traitlets/config/tests/test_loader.py