human
I wrote the below code

    import RFXtrx as rfxtrxmod
    sensors = []
    for (packet_id, entity) in config['devices'].items():
        event = rfxtrx.get_rfx_object(packet_id)
        device_id = slugify(event.device.id_string.lower())
        if (device_id in rfxtrx.RFX_DEVICES):
            continue
        if (entity[ATTR_DATA_BITS] is not None):
            _LOGGER.info('Masked    device    id:    %s', rfxtrx.get_pt2262_deviceid(device_id, entity[ATTR_DATA_BITS]))
        _LOGGER.info('Add    %s    rfxtrx.binary_sensor    (class    %s)', entity[ATTR_NAME], entity[CONF_DEVICE_CLASS])
        device = RfxtrxBinarySensor(event, entity[ATTR_NAME], entity[CONF_DEVICE_CLASS], entity[ATTR_FIREEVENT], entity[ATTR_OFF_DELAY], entity[ATTR_DATA_BITS], entity[CONF_COMMAND_ON], entity[CONF_COMMAND_OFF])
        device.hass = hass
        device.is_lighting4 = (packet_id[2:4] == '13')
        sensors.append(device)
        rfxtrx.RFX_DEVICES[device_id] = device
    add_devices_callback(sensors)
    def binary_sensor_update(event):
        'Callback    for    control    updates    from    the    RFXtrx    gateway.'
        if (not isinstance(event, rfxtrxmod.ControlEvent)):
            return
        device_id = slugify(event.device.id_string.lower())
        if (device_id in rfxtrx.RFX_DEVICES):
            sensor = rfxtrx.RFX_DEVICES[device_id]
        else:
            sensor = rfxtrx.get_pt2262_device(device_id)
        if (sensor is None):
            if (not config[ATTR_AUTOMATIC_ADD]):
                return
            poss_dev = rfxtrx.find_possible_pt2262_device(device_id)
            if (poss_dev is not None):
                poss_id = slugify(poss_dev.event.device.id_string.lower())
                _LOGGER.info('Found    possible    matching    deviceid    %s.', poss_id)
            pkt_id = ''.join(('{0:02x}'.format(x) for x in event.data))
            sensor = RfxtrxBinarySensor(event, pkt_id)
            sensor.hass = hass
            sensor.is_lighting4 = (pkt_id[2:4] == '13')
            rfxtrx.RFX_DEVICES[device_id] =...

What's a good function header?
assistant
#Here's a good function header.

def setup_platform(hass, config, add_devices_callback, discovery_info=None):