def METHOD_NAME(self):
    """get_batch_size
    refer doc: https://www.tencentcloud.com/document/product/248/33881
    one request only support 1440 data points
    so it need to calc the batch size
    """
    data_points_per_resource = math.ceil(self.days * 86400 / self.period)
    return math.floor(1440 / data_points_per_resource)