$ python -V
Python 2.6.6
$ curl -kL https://raw.github.com/utahta/pythonbrew/master/pythonbrew-install | bash
$ . $HOME/.pythonbrew/etc/bashrc
$ pythonbrew install 2.7.1
$ pythonbrew switch 2.7.1
Switched to Python-2.7.1
$ python -V
Python 2.7.1
前提是要先安装curl