/usr/lib/python2.7/dist-packages/tidy/lib.py is in python-utidylib 0.2-9.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/tidy/../../../../share/pyshared/tidy/lib.py
/usr/lib/python2.7/dist-packages/tidy/../../../../share/pyshared/tidy/lib.py