/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/ is in python-prompt-toolkit 1.0.9-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/__init__.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/containers.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/controls.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/dimension.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/lexers.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/margins.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/menus.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/mouse_handlers.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/processors.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/prompt.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/screen.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/toolbars.py
/usr/lib/python2.7/dist-packages/prompt_toolkit/layout/utils.py