/usr/lib/python2.7/dist-packages/psutil/ is in python-psutil 1.2.1-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/psutil/__init__.py
/usr/lib/python2.7/dist-packages/psutil/_common.py
/usr/lib/python2.7/dist-packages/psutil/_compat.py
/usr/lib/python2.7/dist-packages/psutil/_error.py
/usr/lib/python2.7/dist-packages/psutil/_psbsd.py
/usr/lib/python2.7/dist-packages/psutil/_pslinux.py
/usr/lib/python2.7/dist-packages/psutil/_psmswindows.py
/usr/lib/python2.7/dist-packages/psutil/_psosx.py
/usr/lib/python2.7/dist-packages/psutil/_psposix.py
/usr/lib/python2.7/dist-packages/psutil/_pssunos.py
/usr/lib/python2.7/dist-packages/psutil/error.py