<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def start(self):
 """ Start the connection. This should be called after all listeners have been registered. If this method is not called, no frames will be received by the connection. """

        self.running = True
        self.attempt_connection()
        receiver_thread = self.create_thread_fc(self.__receiver_loop)
        receiver_thread.name = "StompReceiver%s" % getattr(receiver_thread, "name", "Thread")
        self.notify('connecting')