1.查看当前python版本
python --version
2.安装最新2.x版本
brew install python@2
安装完成后,注意一下提示:
pip and setuptools have been installed. To update them
pip install --upgrade pip setuptools
You can install Python packages with
pip install <package>
They will install into the site-package directory
/usr/local/lib/python2.7/site-packages
3.退出当前终端,重新打开新终端,再次检查python版本
python --version