Object-oriented and dynamic, Python encourages rapid, iterative, and almost exploratory development. But good Python development starts with a good Python IDE. In this roundup, I examine nine Python development environments, many open source, but some commercial. They are Boa Constructor, Eric, ActiveState's Komodo, Oracle's NetBeans, Aptana's Pydev, PyScripter, SPE, Spyder, and WingWare's Wing IDE.