title: Asynchronous object instantiation
body: <p>How can I make the following object instantiation asynchronous:</p>
  
  <pre><code>class IndexHandler(tornado.web.RequentHandler):
      def get(self, id):
          # Async the following
          data = MyDataFrame(id)
          self.write(data.getFoo())
  </code></pre>
  
  <p>The <code>MyDataFrame</code> returns a <code>pandas</code> <code>DataFrame</code> object and can take some time depending on the file it has to parse.   </p>