gistfile1.txt

def unpacked(callback):
    """Decorator to unpack responses before passing the result to a callback.
    """
    @functools.wraps(callback)
    @tornado.stack_context.wrap
    def unpacking_callback(response):
        callback(mdp.unpack_response(response))
    return unpacking_callback


class SomeHandler(tornado.web.RequestHandler):

    def get_account(self, callback):
        api_key = self.get_api_key()
        arg = {"key": "api_key", "value": api_key}
        request = mdp.pack_request("get", arg)
        jarmodmoo.tornado.send("accounts", request, unpacked(callback))

    @tornado.web.asynchronous
    @gen.engine
    def get(self):
        try:
            account = yield gen.Task(self.get_account)
        except mdp.exceptions.ResponseError:
            self.write_error(400)
        else:
            logger.info("got account %r", account)
            self.write_json(account)
            self.finish()