title: scrapy xpath : selector with many <tr> <td>
body: <p>Hello I want to ask a question</p>
  
  <p>I scrape a website with xpath ,and the result is like this:</p>
  
  <pre><code>[u'&lt;tr&gt;\r\n                    
      &lt;td&gt;address1&lt;/td&gt;\r\n                    
      &lt;td&gt;phone1&lt;/td&gt;\r\n                    
      &lt;td&gt;map1&lt;/td&gt;\r\n                  
    &lt;/tr&gt;',
   u'&lt;tr&gt;\r\n
      &lt;td&gt;address1&lt;/td&gt;\r\n                
      &lt;td&gt;telephone1&lt;/td&gt;\r\n             
      &lt;td&gt;map1&lt;/td&gt;\r\n
    &lt;/tr&gt;'...
  u'&lt;tr&gt;\r\n
      &lt;td&gt;address100&lt;/td&gt;\r\n                
      &lt;td&gt;telephone100&lt;/td&gt;\r\n             
      &lt;td&gt;map100&lt;/td&gt;\r\n
    &lt;/tr&gt;']
  </code></pre>
  
  <p>now I need to use xpath to analyze this results again.<br>
  I want to save the first  to address,the second  to telephone,and the last one to map<br>
  But I can't get it.</p>
  
  <p>Please guide me.Thank you!</p>
  
  <p>Here is code,it's wrong. it will catch another thing.</p>
  
  <pre><code>store =   sel.xpath("")
  for s in store:     
      address = s.xpath("//tr/td[1]/text()").extract()
      tel = s.xpath("//tr/td[2]/text()").extract()
      map = s.xpath("//tr/td[3]/text()").extract()
  </code></pre>