/usr/lib/python2.7/dist-packages/packetdiag/tests/ is in python-nwdiag 1.0.3-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/packetdiag/tests/diagrams/
/usr/lib/python2.7/dist-packages/packetdiag/tests/diagrams/oneliner.diag
/usr/lib/python2.7/dist-packages/packetdiag/tests/diagrams/oneliner_with_quoted.diag
/usr/lib/python2.7/dist-packages/packetdiag/tests/diagrams/oneliner_without_last_semicolon.diag
/usr/lib/python2.7/dist-packages/packetdiag/tests/diagrams/scale_direction.diag
/usr/lib/python2.7/dist-packages/packetdiag/tests/diagrams/scale_interval.diag
/usr/lib/python2.7/dist-packages/packetdiag/tests/diagrams/tcp.diag
/usr/lib/python2.7/dist-packages/packetdiag/tests/diagrams/tcp_2.diag
/usr/lib/python2.7/dist-packages/packetdiag/tests/test_generate_diagram.py
/usr/lib/python2.7/dist-packages/packetdiag/tests/test_pep8.py
/usr/lib/python2.7/dist-packages/packetdiag/tests/test_rst_directives.py