/usr/lib/python2.7/dist-packages/pbkdf2.py is in python-pbkdf2 1.3+20110613.git2a0fb15~ds0-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/../../../share/pyshared/pbkdf2.py