/usr/lib/python3/dist-packages/saml2/extension/ is in python3-pysaml2 4.0.2-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/saml2/extension/__init__.py
/usr/lib/python3/dist-packages/saml2/extension/algsupport.py
/usr/lib/python3/dist-packages/saml2/extension/dri.py
/usr/lib/python3/dist-packages/saml2/extension/idpdisc.py
/usr/lib/python3/dist-packages/saml2/extension/mdattr.py
/usr/lib/python3/dist-packages/saml2/extension/mdrpi.py
/usr/lib/python3/dist-packages/saml2/extension/mdui.py
/usr/lib/python3/dist-packages/saml2/extension/pefim.py
/usr/lib/python3/dist-packages/saml2/extension/reqinit.py
/usr/lib/python3/dist-packages/saml2/extension/shibmd.py
/usr/lib/python3/dist-packages/saml2/extension/ui.py