pip3 install ipython -i https://pypi.tuna.tsinghua.edu.cn/simple
安装完成：
➜ ~ ipython
Python 3.7.2rc1 (v3.7.2rc1:75a402a217, Dec 11 2018, 18:05:25)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.4.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]:
