/usr/lib/python2.7/dist-packages/drslib/cmip5.py is in python-drslib 0.3.0a3-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/drslib/../../../../share/pyshared/drslib/cmip5.py