/usr/lib/python2.7/dist-packages/zope/server/ftp/publisher.py is in python-zope.server 3.8.6-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/server/ftp/../../../../../../share/pyshared/zope/server/ftp/publisher.py