python 輸出重定向
https://python3-cookbook.readthedocs.io/zh-cn/latest/c14/p01_testing_output_sent_to_stdout.html
https://www.cnblogs.com/clover-toeic/p/5491073.html
https://www.cnblogs.com/nancyzhu/p/8551506.html
https://python3-cookbook.readthedocs.io/zh-cn/latest/c14/p01_testing_output_sent_to_stdout.html
https://www.cnblogs.com/clover-toeic/p/5491073.html
https://www.cnblogs.com/nancyzhu/p/8551506.html