title: python tornado get request url
body: <p>Here is my code:</p>
  
  <pre><code>class MainHandler(tornado.web.RequestHandler):
      def get(self):
          self.write(self.request.url)
  
  def main():
      settings = {"template_path": "html","static_path": "static"}
      tornado.options.parse_command_line()
      application = tornado.web.Application([
         (r"/story/page1", MainHandler),
          ],**settings)
  </code></pre>
  
  <p>I want to get the string  "/story/page1".  how ?</p>