python -m pip install --upgrade pip升级失败
python -m pip install --upgrade pip升级失败
解决：
采用国内源：
python -m pip install --upgrade pip -i https://pypi.douban.com/simple
python -m pip install --upgrade pip -i http://mirrors.aliyun.com/pypi/simple/
python -m pip install --upgrade pip升级失败
解决：
采用国内源：
python -m pip install --upgrade pip -i https://pypi.douban.com/simple
python -m pip install --upgrade pip -i http://mirrors.aliyun.com/pypi/simple/
