def __init__(self, conf, session, topic):
        """init a 'topic' publisher.
        """
        exchange_name = rpc_amqp.get_control_exchange(conf)
        super(NotifyPublisher, self).__init__(session,
                                              (exchange_name, topic) % "%s/%s",
                                              {"durable": True})
dataset/ETHPy150Open Havate/havate-openstack/proto-build/gui/horizon/Horizon_GUI/openstack_dashboard/openstack/common/rpc/impl_qpid.py/NotifyPublisher.__init__/swapped operands of `%`