/usr/lib/python2.7/dist-packages/Xlib/keysymdef/thai.py is in python-xlib 0.14+20091101-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/Xlib/keysymdef/../../../../../share/pyshared/Xlib/keysymdef/thai.py