/usr/lib/python2.7/dist-packages/pybtex/database/ is in python-pybtex 0.21-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/pybtex/database/__init__.py
/usr/lib/python2.7/dist-packages/pybtex/database/convert/
/usr/lib/python2.7/dist-packages/pybtex/database/convert/__init__.py
/usr/lib/python2.7/dist-packages/pybtex/database/convert/__main__.py
/usr/lib/python2.7/dist-packages/pybtex/database/format/
/usr/lib/python2.7/dist-packages/pybtex/database/format/__init__.py
/usr/lib/python2.7/dist-packages/pybtex/database/format/__main__.py
/usr/lib/python2.7/dist-packages/pybtex/database/input/
/usr/lib/python2.7/dist-packages/pybtex/database/input/__init__.py
/usr/lib/python2.7/dist-packages/pybtex/database/input/bibtex.py
/usr/lib/python2.7/dist-packages/pybtex/database/input/bibtexml.py
/usr/lib/python2.7/dist-packages/pybtex/database/input/bibyaml.py
/usr/lib/python2.7/dist-packages/pybtex/database/output/
/usr/lib/python2.7/dist-packages/pybtex/database/output/__init__.py
/usr/lib/python2.7/dist-packages/pybtex/database/output/bibtex.py
/usr/lib/python2.7/dist-packages/pybtex/database/output/bibtexml.py
/usr/lib/python2.7/dist-packages/pybtex/database/output/bibyaml.py