mac 安装ipython遇到的问题

1. ERROR: Cannot uninstall ‘six’. 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.
   

2. 在终端执行下面的代码

    sudo pip install six --upgrade --ignore-installed six
   

3. 如果有报了下面这个错误

4. ERROR: Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: ‘/Library/Python/2.7/site-packages/wcwidth’
   Consider using the --user option or check the permissions…

5. 加上–user就行了

    pip install ipython --user
   

6. 就会安装成功了