macOS高版本（12），移除了默认Python

1. brew安装

brew install python@3.8

2. 编辑 ~/.zshrc

vim ~/.zshrc

# python
alias python='/usr/local/bin/python3'
export PATH="/usr/local/opt/python@3.8/libexec/bin:$PATH"

3. 使修改生效

source ~/.zshrc