/usr/lib/python2.7/dist-packages/pycallgraph/pycallgraph.py is in python-pycallgraph 1.0.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/pycallgraph/../../../../share/pyshared/pycallgraph/pycallgraph.py