/usr/lib/python2.7/dist-packages/zope/tales/expressions.py is in python-zope.tales 3.5.3-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/tales/../../../../../share/pyshared/zope/tales/expressions.py