Installing PIL

Sooner or later you may need the PIL library for image manipulation. If you're using OS X, you will see it's not 100% obvious how to install - here is the solution.

For me, PYTHONPATH haven't worked, but this comment helped me out.

Also don't forget to restart AppEngine Launcher after PIL installed.

How to make a simple 404 page in App Engine

In app.yaml you have to define a 'catch all' mask at the very end of the file:

# --- 404 page ---

- url: /.*

script: 404.py

Of course you can use a static file as well.