macOS高版本（12），移除了默认Python

    1. brew安装

      1. brew install python@3.8
      1. vim ~/.zshrc
        1. # python
        2. alias python='/usr/local/bin/python3'
        3. export PATH="/usr/local/opt/python@3.8/libexec/bin:$PATH"

    2. source ~/.zshrc （使修改生效）