/usr/lib/python2.7/dist-packages/oauth2-1.5.211.egg-info/PKG-INFO is in python-oauth2 1.5.211-2ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/oauth2-1.5.211.egg-info/../../../../share/pyshared/oauth2-1.5.211.egg-info/PKG-INFO