/usr/share/pyshared/libavg/avg.so.0 is in python-libavg 1.7.1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/pyshared/libavg/../../../lib/python2.7/dist-packages/libavg/avg.so.0.0.0