Python is a popular object-oriented scripting language, optimized for developer productivity, and used in a wide variety of products and roles. Counted among its user base are Google, Industrial Light and Magic, YouTube, ESRI, iRobot, the BitTorrent file sharing system, NASA’s Jet Propulsion Lab, and the US National Weather Service. Python’s application domains range from system administration, web site development, cell phone scripting, and education, to hardware testing, investment analysis, computer games, and spacecraft control.