/usr/lib/python2.6/dist-packages/gtweak/gsettings.py is in gnome-tweak-tool 3.4.0.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.6/dist-packages/gtweak/../../../../share/pyshared/gtweak/gsettings.py