解决【报错】：RuntimeError: Installing requirements failed. Possibly due to `pip` being too old

python3配套的pip3，安装masc2

 最后报错，RuntimeError: Installing requirements failed. Possibly due to `pip` being too old, found version 9.0.3, needed is >= 18.0.0；看来是pip版本太低

 通过code ‘pip3 list’ 检查一下，发现确实如此

 使用code ‘pip3 install --upgrade pip’ 更新版本，发现依然报错：PermissionError: [Errno 13] Permission denied: '/usr/local/lib/python3.6'

 然后运行code ‘pip3 install --user --upgrade pip’，更新成功！

code ‘pip3 list’

 

 最后就可以install macs2了！code ‘pip3 install macs2’