/usr/lib/python2.7/dist-packages/zope/interface/common/tests/basemapping.py is in python-zope.interface 3.6.1-1ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/interface/common/tests/../../../../../../../share/pyshared/zope/interface/common/tests/basemapping.py