/usr/lib/python2.7/dist-packages/lxml/pyclasslookup.py is in python-lxml 3.3.3-1ubuntu0.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # dummy module for backwards compatibility
from etree import PythonElementClassLookup
|