def fanout_cast(conf, context, topic, msg, **kwargs):
 _multi_send(_cast, context, ('fanout~' + str(topic)), msg, **kwargs)

def fanout_cast ( conf , context , topic , msg , ** kwargs ) : _multi_send ( _cast , context , ( 'fanout~' + str ( topic ) ) , msg , ** kwargs )
cast to all consumers of a topic .