/usr/lib/python2.7/dist-packages/txaws/ec2/tests/test_model.py is in python-txaws 0.2.3-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/txaws/ec2/tests/../../../../../../share/pyshared/txaws/ec2/tests/test_model.py