/usr/lib/python2.7/dist-packages/zope/app/authentication/generic.py is in python-zope.app.authentication 3.9-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/app/authentication/../../../../../../share/pyshared/zope/app/authentication/generic.py