print 'Content-Type: text/plain'Doesn't get a lot simpler than that, does it?
print 'Hello, world!'
There's a lot behind this announcement, including a detailed description of the data store (which interestingly seems to bear the same kind of relationship to a classical relational database that Python does to statically-typed languages), access to some of the attributes of authenticated Google account users, the ability to fetch remote URLs and a startlingly straightforward way to send email.
If I were going to write another book about Python web programming I wouldn't be able to ignore this development. What a tempting idea ...