constant存放文件路径

import os
base_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
data_dir = os.path.join(base_dir, ‘data‘)
data_file = os.path.join(data_dir, ‘data.xlsx‘)

原文：https://www.cnblogs.com/sophia-985935365/p/12629678.html