/usr/lib/python2.7/dist-packages/HTMLgen/HTMLcalendar.py is in python-htmlgen 2.2.2-12ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/HTMLgen/../../../../share/pyshared/HTMLgen/HTMLcalendar.py