/usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol/ubuntuone/storageprotocol/proxy_tunnel.py is in python-ubuntuone-storageprotocol 3.0.0-0ubuntu1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol/ubuntuone/storageprotocol/../../../../../../share/pyshared/ubuntuone-storage-protocol/ubuntuone/storageprotocol/proxy_tunnel.py