/usr/lib/python2.7/dist-packages/zope/browsermenu/interfaces.py is in python-zope.browsermenu 4.0.0-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/browsermenu/../../../../../share/pyshared/zope/browsermenu/interfaces.py