/usr/lib/pyshared/python2.7/rrdtool.so is in python-rrdtool 1.4.7-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/pyshared/python2.7/../../python2.7/dist-packages/rrdtool.so
/usr/lib/pyshared/python2.7/../../python2.7/dist-packages/rrdtool.so