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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 stop(self):
 """Use this method to manually stop the Client. Requires no parameters. Raises: ``ConnectionError`` in case you try to stop an already stopped Client. """

        if not self.is_started:
            raise ConnectionError("Client is already stopped")

        if self.takeout_id:
            self.send(functions.account.FinishTakeoutSession())
            log.warning("Takeout session {} finished".format(self.takeout_id))

        Syncer.remove(self)
        self.dispatcher.stop()

        for _ in range(self.DOWNLOAD_WORKERS):
            self.download_queue.put(None)

        for i in self.download_workers_list:
            i.join()

        self.download_workers_list.clear()

        for _ in range(self.UPDATES_WORKERS):
            self.updates_queue.put(None)

        for i in self.updates_workers_list:
            i.join()

        self.updates_workers_list.clear()

        for i in self.media_sessions.values():
            i.stop()

        self.media_sessions.clear()

        self.is_started = False
        self.session.stop()

        return self