code: def create_pool(
          database,
          minsize=1,
          maxsize=10,
          echo=False,
          loop=None,
          **kwargs
  ):
      
      coro = _create_pool(
          database=database,
          minsize=minsize,
          maxsize=maxsize,
          echo=echo,
          loop=loop,
          **kwargs
      )
      return _PoolContextManager(coro)
docs: 创建支持上下文管理的pool