1. 再a方法中新建了个opener，使用了代理：
proxydict = {}
proxydict['http'] = "https://%s:%s"%(ip,port)
#print proxydict
proxy_handler = urllib2.ProxyHandler(proxydict)
opener = urllib2.build_opener(proxy_handler)
opener.addheaders = [('User-agent', 'Mozilla/5.0')]
urllib2.install_opener(opener) proxydict = 
