human
I wrote the below code

    key = config[DOMAIN][CONF_KEY]
    def trigger_service(call):
        'Handle    IFTTT    trigger    service    calls.'
        event = call.data[ATTR_EVENT]
        value1 = call.data.get(ATTR_VALUE1)
        value2 = call.data.get(ATTR_VALUE2)
        value3 = call.data.get(ATTR_VALUE3)
        try:
            import pyfttt as pyfttt
            pyfttt.send_event(key, event, value1, value2, value3)
        except requests.exceptions.RequestException:
            _LOGGER.exception('Error    communicating    with    IFTTT')
    hass.services.register(DOMAIN, SERVICE_TRIGGER, trigger_service, schema=SERVICE_TRIGGER_SCHEMA)
    return True

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

def setup(hass, config):