/usr/lib/python2.7/dist-packages/pyth/plugins/rst/writer.py is in python-pyth 0.5.6-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/pyth/plugins/rst/../../../../../../share/pyshared/pyth/plugins/rst/writer.py