/usr/lib/pyshared/python2.7/pyisomd5sum.so is in python-pyisomd5sum 1:1.0.7+git.20110618.6c9cd2f-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/pyshared/python2.7/../../python2.7/dist-packages/pyisomd5sum.so