/usr/lib/python2.7/dist-packages/bimdp/test/test_biflow.py is in python-mdp 3.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/bimdp/test/../../../../../share/pyshared/bimdp/test/test_biflow.py