/usr/lib/ is in python-ply 3.4-3ubuntu2.
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/ply-3.4.egg-info/
/usr/lib/python2.7/dist-packages/ply-3.4.egg-info/PKG-INFO
/usr/lib/python2.7/dist-packages/ply-3.4.egg-info/dependency_links.txt
/usr/lib/python2.7/dist-packages/ply-3.4.egg-info/top_level.txt
/usr/lib/python2.7/dist-packages/ply-3.4.egg-info/SOURCES.txt
/usr/lib/python2.7/dist-packages/ply/
/usr/lib/python2.7/dist-packages/ply/cpp.py
/usr/lib/python2.7/dist-packages/ply/__init__.py
/usr/lib/python2.7/dist-packages/ply/yacc.py
/usr/lib/python2.7/dist-packages/ply/lex.py
/usr/lib/python2.7/dist-packages/ply/ctokens.py