/usr/lib/python2.7/dist-packages/repoze.who-1.0.18.egg-info/namespace_packages.txt is in python-repoze.who 1.0.18-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/repoze.who-1.0.18.egg-info/../../../../share/pyshared/repoze.who-1.0.18.egg-info/namespace_packages.txt