参考：
https://askubuntu.com/questions/952302/python-modulenotfounderror-commandnotfound
https://blog.csdn.net/weixin_42730667/article/details/100260883
参考：
https://askubuntu.com/questions/952302/python-modulenotfounderror-commandnotfound
https://blog.csdn.net/weixin_42730667/article/details/100260883
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