把安装的命令改成
sudo pip install six --upgrade --ignore-installed six
Cannot uninstall ‘requests‘. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.
把安装的命令改成
sudo pip install requests --upgrade
原文地址：http://blog.51cto.com/lizhiyuan/2121489
