I am playing in CherryPy these days, the most helpful documentation is directly from the python command line.

[ludo@falbala ~]$ python2.6
Python 2.6.3 (r263:75183, Oct  9 2009, 13:58:37) 
[GCC 4.1.2 20071124 (Red Hat 4.1.2-42)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import cherrypy
>>> help(cherrypy)
>>> help(cherrypy.config)