                        课程
                    
                        /后端开发
                        
                            /Python
                        
                        /Python开发简单爬虫

为什么运行结果为空？？真的很急

# -*- coding: UTF-8 -*-
import urllib2

class HtmlDownloader(object):

def download(self, url):
if url is None:
return None

response = urllib2.urlopen(url)

if response.getcode() != 200:
return None

return response.read()

s=HtmlDownloader()
s.download("http://xiaoshuo.sogou.com/book/11_493239/")

运行结果：