code: def gossip_bind(self, format, *args):
          
          return lib.zyre_gossip_bind(self._as_parameter_, format, *args)
docs: Set-up gossip discovery of other nodes. At least one node in the cluster
  must bind to a well-known gossip endpoint, so other nodes can connect to
  it. Note that gossip endpoints are completely distinct from Zyre node
  endpoints, and should not overlap (they can use the same transport).