title: Scrapy multiple spiders
body: <p>I have defined two spiders which do the following:</p>
  
  <p><strong>Spider A:</strong></p>
  
  <ol>
  <li>Visits the home page.</li>
  <li>Extracts all the links from the page and stores them in a text file.</li>
  </ol>
  
  <p>This is necessary since the home page has a <strong>More Results</strong> button which produces further links to different products.</p>
  
  <p><strong>Spider B:</strong></p>
  
  <ol>
  <li><p>Opens the text file.</p></li>
  <li><p>Crawls the individual pages and saves the information.</p></li>
  </ol>
  
  <p>I am trying to combine the two and make a <code>crawl-spider</code>.</p>
  
  <p>The URL structure of the home page is similar to:</p>
  
  <pre><code>http://www.example.com
  </code></pre>
  
  <p>The URL structure of the individual pages is similar to:</p>
  
  <pre><code>http://www.example.com/Home/Detail?id=some-random-number
  </code></pre>
  
  <p>The text file contains the list of such URLs which are to be scraped by the second spider.</p>
  
  <p>My question:</p>
  
  <p>How do I combine the two spiders so as to make a single spider which does the complete scraping?</p>