/usr/lib/pyshared/python2.7/libtiff/bittools.so 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/pyshared/python2.7/libtiff/../../../python2.7/dist-packages/libtiff/bittools.so