I have built a few web applications using the Python language. I have tried both TurboGears2 and Django and TurboGears2 suited me best.
Here is an overview about the apps. For more information, with code examples, follow the links in the appropriate applications summary here.
This site
This site is a TurboGears2 web application. It has a MySQL database behind it and stores most of the content in there. It is a growing application and still has quite a few features to be added.
You can check here for a more detailed look at the code
Beekeeping site
This is a site that I am working on for my beekeeping business. It is a TurboGears2 web app using a PostgreSQL back end. I am currently hosting it in a VM.