/usr/lib/python2.7/dist-packages/netaddr/eui/oui.idx is in python-netaddr 0.7.5-4build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/netaddr/eui/../../../../../share/pyshared/netaddr/eui/oui.idx