#Python 命令
- 系统默认使用python2，使用brew可安装python3
- python --version：查看python2版本
- which python：查看python安装路径
- 设置路径$path:
- echo $PATH
- vi /etc/paths
- vi ~/.bash_profile
- If you wish to have this formula's python executable in your PATH then add the following to ~/.bash_profile: export PATH="/usr/local/opt/python/libexec/bin:$PATH"
- 保存，source ~/.bash_profile
- new 一个终端窗口才能看到调整后的结果