/usr/lib/python2.7/dist-packages/zope/browsermenu/tests/test_fields.py is in python-zope.browsermenu 3.9.1-0ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/browsermenu/tests/../../../../../../share/pyshared/zope/browsermenu/tests/test_fields.py