/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/ is in pegasus-wms 4.4.0+dfsg-7.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/__init__.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/plots/
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/plots/__init__.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/plots/pegasus_breakdown.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/plots/pegasus_gantt.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/plots/pegasus_host_over_time.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/plots/pegasus_time.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/plots/populate.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/plots/workflow_info.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/stats/
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/stats/__init__.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/stats/workflow_stats.py
/usr/lib/python2.7/dist-packages/Pegasus/plots_stats/utils.py