这种情况下就是你的pip版本有问题，需要进行升级，这个问题的解决是参考：
WARNING: You are using pip version 20.2.4; however, version 20.3.1 is available. - 天天向上2000 - 博客园
这个时候直接在cmd中输入，使用豆瓣的镜像就可以成功升级
python -m pip install --upgrade pip -i /simple相关文章
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