code: def _route(self, attr, args, kwargs, **fkwargs):
          
  
          key = get_key(args, kwargs)
  
          found = self._hash.get_node(key)
  
          if not found and len(self._down_connections) > 0:
              raise self.HostListExhausted()
  
          return [i for i, h in self.cluster.hosts.iteritems()
                  if h.identifier == found]
docs: The first argument is assumed to be the ``key`` for routing.