text: """
  created by ldolin
  """
  from lxml import etree
  
  """
  回顾：
      指定页面贴吧
      
      
      https://wapp.baidu.com/mo/q/f?kw=校花&pn=0
      
      1.xpath解析网页，得到每个帖子的url
      
      
      
      
      
  """
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
      