/usr/lib/python2.7/dist-packages/lxml/html/ is in python-lxml 3.3.3-1ubuntu0.2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/lxml/html/ElementSoup.py
/usr/lib/python2.7/dist-packages/lxml/html/__init__.py
/usr/lib/python2.7/dist-packages/lxml/html/_diffcommand.py
/usr/lib/python2.7/dist-packages/lxml/html/_html5builder.py
/usr/lib/python2.7/dist-packages/lxml/html/_setmixin.py
/usr/lib/python2.7/dist-packages/lxml/html/builder.py
/usr/lib/python2.7/dist-packages/lxml/html/clean.py
/usr/lib/python2.7/dist-packages/lxml/html/defs.py
/usr/lib/python2.7/dist-packages/lxml/html/diff.py
/usr/lib/python2.7/dist-packages/lxml/html/formfill.py
/usr/lib/python2.7/dist-packages/lxml/html/html5parser.py
/usr/lib/python2.7/dist-packages/lxml/html/soupparser.py
/usr/lib/python2.7/dist-packages/lxml/html/usedoctest.py