from twisted.web.client import getPage, deferfrom twisted.internet import reactordef all_done(arg):    reactor.stop()def callback(contents):    print(contents)deferred_list = []url_list = ['http://www.bing.com', 'http://www.baidu.com', ]for url in url_list:    deferred = getPage(bytes(url, encoding='utf8'))    deferred.addCallback(callback)    deferred_list.append(deferred)dlist = defer.DeferredList(deferred_list)dlist.addBoth(all_done)reactor.run()

from twisted.internet import reactorfrom twisted.web.client import getPageimport urllib.parsedef one_done(arg):    print(arg)    reactor.stop()post_data = urllib.parse.urlencode({'check_data': 'adf'})post_data = bytes(post_data, encoding='utf8')headers = {b'Content-Type': b'application/x-www-form-urlencoded'}response = getPage(bytes('http://dig.chouti.com/login', encoding='utf8'),                   method=bytes('POST', encoding='utf8'),                   postdata=post_data,                   cookies={},                   headers=headers)response.addBoth(one_done)reactor.run()