#### First install [VirtualEnv](http://virtualenv.readthedocs.org/en/latest/) or [VirtualEnvWrapper](http://virtualenvwrapper.readthedocs.org/en/latest/) (<i>if not installed</i>):
MAC / Linux:
```bash
sudo easy_install --upgrade virtualenv
sudo easy_install --upgrade virtualenvwrapper
```
WINDOWS:
```bash
pip install --upgrade virtualenv
pip install --upgrade virtualenvwrapper-win
```
#### Now use VirtualEnv or VirtualEnvWrapper to create a virtual environment: