/usr/lib/pyshared/python2.7/guiqwt/histogram2d.so is in python-guiqwt 2.3.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/pyshared/python2.7/guiqwt/../../../python2.7/dist-packages/guiqwt/histogram2d.so