Circuits framework parallel fetching example - broken

fetchertest.py

#!/bin/env python3
from circuits.web.client import Client, request as request_event
from circuits.web import Server, Controller
from circuits import handler, Debugger


class Root(Controller):
    channel = "web"

    def __init__(self):
        super().__init__()

    @handler("request", priority=0.3)
    def _on_request(self, event, request, response):
        if request.path != "/":
            print(request.path)
            return

        urls = [
            'https://www.w3.org/services/html2txt?url=http%3A%2F%2Fwww.example.com%2F',
            'http://home.hiwaay.net/~jimes/checklist.txt'
        ]
        events = []
        results = []
        for url in urls:
            event = request_event('GET', url)
            events.append(event)
            self.fire(event, 'url-fetching')
        # for event in events:
            er = yield self.waitEvent(event, 'url-fetching')
            results.append(er)

        response.headers["Content-Type"] = "text/plain"
        response.body = " ".join([r.value.read().decode("utf-8") for r in results])

        try:
            return response
        finally:
            event.stop()


(Server(8011) + Root() + Client(channel='url-fetching') + Debugger()).run()