/usr/lib/python2.7/dist-packages/usbcreator/frontends/gtk/unitysupport.py is in usb-creator-gtk 0.2.38.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/usbcreator/frontends/gtk/../../../../../../share/pyshared/usbcreator/frontends/gtk/unitysupport.py