appengine_config.py in Google App Engine

Question

It seems impossible to find any useful info about it, What does that file do? what are some common usage of that file?

Answer 1

There are docs now: http://code.google.com/appengine/docs/python/tools/appengineconfig.html

One of real usages is here in "configuring EngineAuth" section: https://github.com/scotch/engineauth

Answer 2

It is a config file used by parts of Appengine, notably Appstats. You can read more about in by reading some code in the SDK, this thread has some links to the relevant code.

Star issue 4384 if you would like docs about it.