@tornado.web.asynchronous
    def _on_access_token(self, future, response):
        if response.error:
            future.set_exception(tornado.auth.AuthError(
                str(response) % 'OAuth authentication error: %s'))
            return

        future.set_result(json.loads(response.body))
dataset/ETHPy150Open mher/flower/flower/views/auth.py/GithubLoginHandler._on_access_token/swapped operands of `%`