/usr/lib/python2.7/dist-packages/sphinx/environment/ is in python-sphinx 1.6.7-1ubuntu1.
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/usr/lib/python2.7/dist-packages/sphinx/environment/__init__.py
/usr/lib/python2.7/dist-packages/sphinx/environment/adapters/
/usr/lib/python2.7/dist-packages/sphinx/environment/adapters/__init__.py
/usr/lib/python2.7/dist-packages/sphinx/environment/adapters/asset.py
/usr/lib/python2.7/dist-packages/sphinx/environment/adapters/indexentries.py
/usr/lib/python2.7/dist-packages/sphinx/environment/adapters/toctree.py
/usr/lib/python2.7/dist-packages/sphinx/environment/collectors/
/usr/lib/python2.7/dist-packages/sphinx/environment/collectors/__init__.py
/usr/lib/python2.7/dist-packages/sphinx/environment/collectors/asset.py
/usr/lib/python2.7/dist-packages/sphinx/environment/collectors/dependencies.py
/usr/lib/python2.7/dist-packages/sphinx/environment/collectors/indexentries.py
/usr/lib/python2.7/dist-packages/sphinx/environment/collectors/metadata.py
/usr/lib/python2.7/dist-packages/sphinx/environment/collectors/title.py
/usr/lib/python2.7/dist-packages/sphinx/environment/collectors/toctree.py