Mac上python2和python3的版本切换的简单处理方式

1. bash_profile

vi ~/.bash_profile

PATH="/Library/Frameworks/Python.framework/Versions/2.7/bin:${PATH}"
export PATH

PATH="/Library/Frameworks/Python.framework/Versions/3.6/bin:${PATH}"
export PATH

source ~/.bash_profile

2.编辑.bashrc文件

vi ~/.bashrc

alias python2='/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7'
alias python3='/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6'
alias python=python2

source ~/.bashrc