code: def sitemap_check(url):
          
          response = urllib2.urlopen(UrlExtractor.get_sitemap_url(url, True))
  
          # Check if "Sitemap" is set
          return "Sitemap:" in response.read().decode('utf-8')
docs: Sitemap-Crawler are supported by every site which have a
          Sitemap set in the robots.txt.
  
          :param str url: the url to work on
          :return bool: Determines if Sitemap is set in the site's robots.txt