新手学习python ,遇到一个问题，求助

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 开发四年只会写业务代码，分布式高并发都不会还做程序员？->>>    练习写爬虫，这个页面的图片路径爬不下来了，其他页面倒是能爬取下来，求大神指教，代码如下： #-*- coding: utf-8 -*- import urllib2 import re def html_get(url):      #获取网页内容      user_agent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36 QIHU 360EE'      headers = {'User-Agent':user_agent}      req = urllib2.Request(url,headers = headers)      response = urllib2.urlopen(req)      html = response.read()      return html if __name__ == '__main__':     content_url = 'http://tieba.baidu.com/p/3428007979?pn=2'     content_page_html = html_get(content_url)     print content_page_html     pattern = re.compile(r'<img.*?class="BDE_Image".*?src="(.*?)".*?pic_ext="jpeg".*?',re.S)#获取图片路径     images_url = pattern.findall(content_page_html)     print(images_url)