/usr/lib/ is in python-txtftp 0.1~bzr38-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/
/usr/lib/python2.7/dist-packages/
/usr/lib/python2.7/dist-packages/tftp/
/usr/lib/python2.7/dist-packages/tftp/test/
/usr/lib/python2.7/dist-packages/twisted/
/usr/lib/python2.7/dist-packages/twisted/plugins/
/usr/lib/python2.7/dist-packages/tftp/protocol.py
/usr/lib/python2.7/dist-packages/tftp/backend.py
/usr/lib/python2.7/dist-packages/tftp/netascii.py
/usr/lib/python2.7/dist-packages/tftp/test/test_netascii.py
/usr/lib/python2.7/dist-packages/tftp/test/test_backend.py
/usr/lib/python2.7/dist-packages/tftp/test/test_sessions.py
/usr/lib/python2.7/dist-packages/tftp/test/test_wire_protocol.py
/usr/lib/python2.7/dist-packages/tftp/test/__init__.py
/usr/lib/python2.7/dist-packages/tftp/test/test_util.py
/usr/lib/python2.7/dist-packages/tftp/test/test_bootstrap.py
/usr/lib/python2.7/dist-packages/tftp/test/test_protocol.py
/usr/lib/python2.7/dist-packages/tftp/datagram.py
/usr/lib/python2.7/dist-packages/tftp/__init__.py
/usr/lib/python2.7/dist-packages/tftp/bootstrap.py
/usr/lib/python2.7/dist-packages/tftp/errors.py
/usr/lib/python2.7/dist-packages/tftp/util.py
/usr/lib/python2.7/dist-packages/tftp/session.py
/usr/lib/python2.7/dist-packages/twisted/plugins/tftp_plugin.py