/usr/lib/python2.7/ is in nordugrid-arc-python 5.4.2-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/
/usr/lib/python2.7/dist-packages/_arc.x86_64-linux-gnu.so
/usr/lib/python2.7/dist-packages/arc/
/usr/lib/python2.7/dist-packages/arc/__init__.py
/usr/lib/python2.7/dist-packages/arc/common.py
/usr/lib/python2.7/dist-packages/arc/communication.py
/usr/lib/python2.7/dist-packages/arc/compute.py
/usr/lib/python2.7/dist-packages/arc/credential.py
/usr/lib/python2.7/dist-packages/arc/data.py
/usr/lib/python2.7/dist-packages/arc/delegation.py
/usr/lib/python2.7/dist-packages/arc/loader.py
/usr/lib/python2.7/dist-packages/arc/message.py
/usr/lib/python2.7/dist-packages/arc/security.py