code: def get_replicas(self, keyspace, key):
          
          t = self.token_map
          if not t:
              return []
          try:
              return t.get_replicas(keyspace, t.token_class.from_key(key))
          except NoMurmur3:
              return []
docs: Returns a list of :class:`.Host` instances that are replicas for a given
          partition key.