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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def listen(self):
 """ Set up a quick connection. Returns on disconnect. After calling `connect()`, this waits for messages from the server using `select`, and notifies the subscriber of any events. """

        import select
        while self.connected:
            r, w, e = select.select((self.ws.sock, ), (), ())
            if r:
                self.on_message()
            elif e:
                self.subscriber.on_sock_error(e)
        self.disconnect()