Gawsh is a framework and set of utilites to support development for the Google App Engine.

The first utility is a bulk-download facility to support downloading data from a Google App to a file on the client, in either CSV or XML format. It consists of a client module, run on the desktop, and a server module to be customized and incorporated into a Google App, with a similar structure to the bulk upload components supplied by Google. Read the description and instructions on this wiki page and download the code, plus some test fixtures, from the Downloads section.

There is also a little code, and a lot of discussion, about testing methods and techniques specific to testing the Google App Engine. Learn how to write tests that you can run simply by using the Idle editor that came with Python and hitting F5. Read the description, and a lot of opinionated comments, on this wiki page and download the code, plus some test fixtures, from the Downloads section.