/usr/lib/python2.7/dist-packages/libtiff/lsm.py is in python-libtiff 0.3.0~svn78-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/libtiff/../../../../share/pyshared/libtiff/lsm.py