/usr/lib/python2.7/dist-packages/bs4/ is in python-bs4 4.2.1-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/bs4/__init__.py
/usr/lib/python2.7/dist-packages/bs4/builder/
/usr/lib/python2.7/dist-packages/bs4/builder/__init__.py
/usr/lib/python2.7/dist-packages/bs4/builder/_html5lib.py
/usr/lib/python2.7/dist-packages/bs4/builder/_htmlparser.py
/usr/lib/python2.7/dist-packages/bs4/builder/_lxml.py
/usr/lib/python2.7/dist-packages/bs4/dammit.py
/usr/lib/python2.7/dist-packages/bs4/diagnose.py
/usr/lib/python2.7/dist-packages/bs4/element.py
/usr/lib/python2.7/dist-packages/bs4/testing.py
/usr/lib/python2.7/dist-packages/bs4/tests/
/usr/lib/python2.7/dist-packages/bs4/tests/__init__.py
/usr/lib/python2.7/dist-packages/bs4/tests/test_builder_registry.py
/usr/lib/python2.7/dist-packages/bs4/tests/test_docs.py
/usr/lib/python2.7/dist-packages/bs4/tests/test_html5lib.py
/usr/lib/python2.7/dist-packages/bs4/tests/test_htmlparser.py
/usr/lib/python2.7/dist-packages/bs4/tests/test_lxml.py
/usr/lib/python2.7/dist-packages/bs4/tests/test_soup.py
/usr/lib/python2.7/dist-packages/bs4/tests/test_tree.py