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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 main():
 """ Example application that watches for an event from a specific RF device. This feature allows you to watch for events from RF devices if you have an RF receiver. This is useful in the case of internal sensors, which don't emit a FAULT if the sensor is tripped and the panel is armed STAY. It also will monitor sensors that aren't configured. NOTE: You must have an RF receiver installed and enabled in your panel for RFX messages to be seen. """

    try:
        # Retrieve the first USB device
        device = AlarmDecoder(SerialDevice(interface=SERIAL_DEVICE))

        # Set up an event handler and open the device
        device.on_rfx_message += handle_rfx
        with device.open(baudrate=BAUDRATE):
            while True:
                time.sleep(1)

    except Exception as ex:
        print('Exception:', ex)