/usr/lib/python2.7/dist-packages/sagenb/flask_version/ is in python-sagenb 1.0.1+ds1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/sagenb/flask_version/__init__.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/admin.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/authentication.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/base.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/decorators.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/doc.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/nodoctest.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/settings.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/worksheet.py
/usr/lib/python2.7/dist-packages/sagenb/flask_version/worksheet_listing.py