/usr/lib/python2.7/dist-packages/gastablesgui/ObliqueShock.py is in gastables 0.3-2.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/gastablesgui/../../../../share/pyshared/gastablesgui/ObliqueShock.py