How to investigate web script not running?

[Gilles]

On Fri, 28 Sep 2012 13:37:36 +0200, Gilles <nospam at nospam.com> wrote:

>==============
>Internal Server Error
>
>The server encountered an internal error or misconfiguration and was
>unable to complete your request.
>==============

Looks like fcgi.py doesn't support WSGI:

Traceback (most recent call last):
File "hello.fcgi", line 2, in ?
from fcgi import WSGIServer
ImportError: cannot import name WSGIServer