/usr/lib/python2.7/dist-packages/melange/ipam/service.py is in python-melange 2012.1~e4~20120126.11502-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/melange/ipam/../../../../../share/pyshared/melange/ipam/service.py