python -m pip install --upgrade pip -i https://pypi.douban.com/simple
Windows下python2和python3的共存设置
https://blog.csdn.net/weixin_39986952/article/details/84794537
python -m pip install --upgrade pip -i https://pypi.douban.com/simple
Windows下python2和python3的共存设置
https://blog.csdn.net/weixin_39986952/article/details/84794537