def put(self, entity):
    actual_entity = _normalize_entity(entity)
    entity_size = len(actual_entity._ToPb().Encode())
    if (self.puts.length >= MAX_ENTITY_COUNT or
        (self.puts.size + entity_size) > self.max_pool_size):
      self.__flush_puts()
    self.puts.append(actual_entity, entity_size)
Registers entity to put to datastore.
dataset/ETHPy150Open livid/v2ex/mapreduce/context.py/MutationPool.put