/usr/lib/python2.7/dist-packages/navadd/navadd.py is in trac-navadd 0.3+svn13554-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/navadd/../../../../share/pyshared/navadd/navadd.py