<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def notify(self):
 """Notify the client. The function passed to ``App.respond`` will get called. """

        if flask.has_request_context():
            emit(_NAME + str(self._uuid))
        else:
            sio = flask.current_app.extensions['socketio']
            sio.emit(_NAME + str(self._uuid))
        eventlet.sleep()