/usr/lib/python2.7/dist-packages/tryton/gui/window/view_form/view/graph_gtk/pie.py is in tryton-client 3.0.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/tryton/gui/window/view_form/view/graph_gtk/../../../../../../../../../share/pyshared/tryton/gui/window/view_form/view/graph_gtk/pie.py