/usr/lib/python2.7/dist-packages/mistral/engine/ is in python-mistral 6.0.0-0ubuntu1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/mistral/engine/__init__.py
/usr/lib/python2.7/dist-packages/mistral/engine/action_handler.py
/usr/lib/python2.7/dist-packages/mistral/engine/action_queue.py
/usr/lib/python2.7/dist-packages/mistral/engine/actions.py
/usr/lib/python2.7/dist-packages/mistral/engine/base.py
/usr/lib/python2.7/dist-packages/mistral/engine/default_engine.py
/usr/lib/python2.7/dist-packages/mistral/engine/dispatcher.py
/usr/lib/python2.7/dist-packages/mistral/engine/engine_server.py
/usr/lib/python2.7/dist-packages/mistral/engine/policies.py
/usr/lib/python2.7/dist-packages/mistral/engine/task_handler.py
/usr/lib/python2.7/dist-packages/mistral/engine/tasks.py
/usr/lib/python2.7/dist-packages/mistral/engine/utils.py
/usr/lib/python2.7/dist-packages/mistral/engine/workflow_handler.py
/usr/lib/python2.7/dist-packages/mistral/engine/workflows.py