Has anyone deployed a Flask app using modjy, the WSGI gateway that ships with Jython?

I get the following exception:
modjy.modjy_exceptions.NoCallable: No callable named 'handler' in /usr/local/apache-tomcat-6.0.33/webapps/modjy_webapp//demo.py
My understanding was the WSGI applications can be called by importing the app as application.  I'm using the app_import_name mechanism described here: http://www.jython.org/jythonbook/en/1.0/SimpleWebApps.html#wsgi-and-modjy
Thanks,
Julian