In features and maturity, it has no real competitors. When it comes to Python web application development, however, it does have some challengers. Chuck Esterbrook leads a project to create an application server more oriented to Python developers, namely, Webware for Python .
Several modules make up the Webware package.
The core part is WebKit, the actual application server. WebKit works in roughly the same way as a Java Servlet engine, managing and executing Python servlets. WebKit is extendable through plug-in modules. PSP works in roughly the same way as ASP or JSP, allowing you to embed Python directly in your web pages. Those familiar with Java Servlets or Apple's WebObjects will feel right at home with Webware.