/usr/lib/python2.7/dist-packages/apport/crashdb_impl/multipartpost_handler.py is in python-apport 2.0.1-0ubuntu17.15.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/apport/crashdb_impl/../../../../../share/pyshared/apport/crashdb_impl/multipartpost_handler.py