/usr/lib/python2.7/dist-packages/z3c.pt-2.1.5.egg-info/not-zip-safe is in python-z3c.pt 2.1.5-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/z3c.pt-2.1.5.egg-info/../../../../share/pyshared/z3c.pt-2.1.5.egg-info/not-zip-safe