foo.python

__requires__ = ['cherrypy']


import cherrypy


class Server:
    @classmethod
    def run(cls):
        config = {
            'global': {
                'server.socket_host': '::',
                'server.socket_port': 0,
            }
        }
        cherrypy.quickstart(cls(), config=config)

    @cherrypy.expose
    def index(self):
        return "Hello World!"


__name__ == '__main__' and Server.run()