/usr/lib/python2.7/dist-packages/Pyrex-0.9.8.5.egg-info is in python-pyrex 0.9.8.5-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/../../../share/pyshared/Pyrex-0.9.8.5.egg-info