安装python3

brew install python3
## 此时，命令行输入python3则打开python3，输入python则打开python2

安装ipython3

sudo pip install ipython
sudo pip3 install ipython ## ipython3 install

配置

安装好以后，输入ipython3命令发现没有这个，所以进入到 /usr/local/bin 目录
然后 vim ipython3 输入如下内容，退出，chmod +x ipython3

#!/usr/local/opt/python/bin/python3.7
#-*- coding: utf-8 -*-
import re
import sys

from IPython import start_ipython
if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
    sys.exit(start_ipython())
###python3.7 目录可以修改成你电脑实际ipython3的版本即可