CherryPy

CherryPy is a pythonic, object-oriented HTTP framework. It allows building web applications in much the same way one would build any other object-oriented program. This design results in more concise and readable code developed faster. It's all just properties and methods. It is now more than ten years old and has proven fast and very stable. It is being used in production by many sites, from the simplest to the most demanding. And perhaps most importantly, it is fun to work with :-)