/usr/lib/ is in python3-software-properties 0.96.20.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/
/usr/lib/python3/dist-packages/
/usr/lib/python3/dist-packages/softwareproperties/
/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py
/usr/lib/python3/dist-packages/softwareproperties/cloudarchive.py
/usr/lib/python3/dist-packages/softwareproperties/ppa.py
/usr/lib/python3/dist-packages/softwareproperties/__init__.py
/usr/lib/python3/dist-packages/softwareproperties/MirrorTest.py
/usr/lib/python3/dist-packages/softwareproperties/AptAuth.py
/usr/lib/python3/dist-packages/softwareproperties/shortcuts.py
/usr/lib/python3/dist-packages/softwareproperties/CountryInformation.py
/usr/lib/python3/dist-packages/softwareproperties/distro.py