title: xpath how to extract the href attribute value based on the content?
body: <pre><code>&lt;a class="tab-link"&gt; hoho &lt;/a&gt;
  &lt;a class="tab-link" href="screener.ashx?v=110&amp;amp;s=ta_topgainers&amp;amp;r=41"&gt;&lt;b&gt;next&lt;/b&gt;&lt;/a&gt;
  &lt;a class="tab-link"&gt; hohaao &lt;/a&gt;
  </code></pre>
  
  <p>I'm working on the scrapy
  how can I grap the href attribute value based on the content "next" in xpath?</p>