title: Can we add regular expression in scrapy .xpath()
body: <pre><code>title = data.xpath("//*[@id='jsheadline_989615']/span/text()").extract()
  name = data.xpath("//*[@id='js_item_989615']/div[1]/div[2]/div[3]/strong[1]/text()")
          .extract()
  price = data.xpath("//*[@id='js_item_989615']/div[1]/div[2]/div[3]/strong[2]/text()")
          .extract()
  print title, name, price
  </code></pre>
  
  <p>For above code I want to write a regular expression for <code>id</code></p>
  
  <pre><code>title = data.xpath("//*[@id='([jsheadline_]+\d{5}[0-9])']/span/text()").extract()
  </code></pre>
  
  <p>Is not giving any result to me. I am using <code>xpath helper 2.0</code> on Chrome</p>