问tornado:在呈现的页面中将字符串数据传递给javascript代码

EN

def start_server():
    data = {"a": 1, "b": 3}
    string_data = json.dumps(data)

    class IndexHandler(tornado.web.RequestHandler):
        def get(self):
            path = os.path.join(os.path.dirname(__file__), "web")
            self.render(os.path.join(path, 'index.html'), data=string_data)
            return

    app = tornado.web.Application([(r"/", IndexHandler)])
    app.listen(8000)
    tornado.ioloop.IOLoop.current().start()
    return

<script>
  console.log("{{data}}");
  obj = JSON.parse("{{data}}");
  console.log(obj);
</script>

{"a": 1, "b": 3}