[python] python 獨立環境 virtualenv (not root)

Installation instructions — pip 1.0.2 documentation
http://www.pip-installer.org/en/latest/installing.html


$ curl -O https://raw.github.com/pypa/virtualenv/master/virtualenv.py
$ python virtualenv.py my_new_env

在 bin下選擇需要的bashrc or cshrc source他

$ source my_new_env/bin/activate
(my_new_env)$ pip install ...