/usr/lib/python2.7/dist-packages/notebook/services/contents/ is in python-notebook 5.2.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/notebook/services/contents/__init__.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/checkpoints.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/filecheckpoints.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/fileio.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/filemanager.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/handlers.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/largefilemanager.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/manager.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/tests/
/usr/lib/python2.7/dist-packages/notebook/services/contents/tests/__init__.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/tests/test_contents_api.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/tests/test_fileio.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/tests/test_largefilemanager.py
/usr/lib/python2.7/dist-packages/notebook/services/contents/tests/test_manager.py