/usr/lib/python3/ is in sessioninstaller 0.20+bzr150-0ubuntu4.1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/
/usr/lib/python3/dist-packages/sessioninstaller-0.0.0.egg-info
/usr/lib/python3/dist-packages/sessioninstaller/
/usr/lib/python3/dist-packages/sessioninstaller/backends/
/usr/lib/python3/dist-packages/sessioninstaller/backends/aptd.py
/usr/lib/python3/dist-packages/sessioninstaller/backends/__init__.py
/usr/lib/python3/dist-packages/sessioninstaller/backends/synaptic.py
/usr/lib/python3/dist-packages/sessioninstaller/backends/dummy.py
/usr/lib/python3/dist-packages/sessioninstaller/__init__.py
/usr/lib/python3/dist-packages/sessioninstaller/gstinstaller.py
/usr/lib/python3/dist-packages/sessioninstaller/utils.py
/usr/lib/python3/dist-packages/sessioninstaller/errors.py
/usr/lib/python3/dist-packages/sessioninstaller/core.py