1、屏幕输入pyenv命令，会看到如下可以使用的命令 commands List all available pyenv 艘早祓胂commands local Set or show the local application-specific Python version global Set or show the global Python version shell Set or show the shell-specific Python version install Install a Python version using python-build uninstall Uninstall a specific Python version rehash Rehash pyenv shims (run this after installing executables) version Show the current Python version and its origin versions List all Python versions available to pyenv which Display the full path to an executable whence List all Python versions that contain the given executabl
3、使用pyenv install -v 2.1.3，带上版本号2.1.3就能进行自动安装该版本。使用pyenv 另外一个好处就是能很方便的安装python历史版本
5、使用pyenv global 3.6.3切换到3.6.3
