/usr/lib/python2.7/dist-packages/mrjob/examples/mr_page_rank.py is in python-mrjob 0.3.3.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/mrjob/examples/../../../../../share/pyshared/mrjob/examples/mr_page_rank.py