/usr/lib/python2.7/dist-packages/django_piston-0.2.3-nspkg.pth is in python-django-piston 0.2.3-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/../../../share/pyshared/django_piston-0.2.3-nspkg.pth