I\'m using WebDriver through the Python bindings located on Google\'s site. According to the documentation here, it supports four browsers: Chrome, IE, Firefox, and HtmlUnit.
HtmlUnit is a Java library so the only choice for non-java WebDriver bindings is to use a RemoteWebDriver. You will need to start a Selenium Server and connect to it specifying the HtmlUnit as desired browser.
I am not very familiar with Python, but according to http://code.google.com/p/selenium/wiki/PythonBindings it should look something like:
from selenium.remote import connect
from selenium import HTMLUNIT
wd = connect(HTMLUNIT, server="http://:4444")