Async Batching with Twisted: A Walkthrough

deferred-list.py

from twisted.internet import reactor
from twisted.web.client import getPage
from twisted.internet.defer import DeferredList

def listCallback(results):
  print results

def finish(ign):
  reactor.stop()

def test():
  d1 = getPage('http://www.google.com')
  d2 = getPage('http://yahoo.com')
  dl = DeferredList([d1, d2])
  dl.addCallback(listCallback)
  dl.addCallback(finish)

test()
reactor.run()