阅读小米网关组件代码理解问题

nuomi

起因，自己的产品接入到ha中，开发属于自己的网关组件产品
第一步阅读参考小米网关的代码，但是阅读过程中遇到障碍求助一下大神人物
def setup(hass, config):
    """Set up the Xiaomi component."""
    gateways = []
    interface = 'any'
    discovery_retry = 3
    if DOMAIN in config:
        gateways = config[DOMAIN][CONF_GATEWAYS]
        interface = config[DOMAIN][CONF_INTERFACE]
        discovery_retry = config[DOMAIN][CONF_DISCOVERY_RETRY]

    async def xiaomi_gw_discovered(service, discovery_info):  # 问题1 这行代码是什么作用，没有看到具体的实现，
乍一看以为是一个函数？？？？？？
        """Perform action when Xiaomi Gateway device(s) has been found."""
        # We don't need to do anything here, the purpose of Home Assistant's
        # discovery service is to just trigger loading of this
        # component, and then its own discovery process kicks in.

    discovery.listen(hass, SERVICE_XIAOMI_GW, xiaomi_gw_discovered)

    from xiaomi_gateway import XiaomiGatewayDiscovery
    xiaomi = hass.data[PY_XIAOMI_GATEWAY] = XiaomiGatewayDiscovery(
        hass.add_job, gateways, interface)

    _LOGGER.debug("Expecting %s gateways", len(gateways))
    for k in range(discovery_retry):
        _LOGGER.info("Discovering Xiaomi Gateways (Try %s)", k + 1)
        xiaomi.discover_gateways()
        if len(xiaomi.gateways) >= len(gateways):
            break

nuomi

小米网关那行代码是什么作用  实现在哪里呢 顶下

pppwaw

字面意思是异步函数，估计async有什么特殊的作用
这个东西就是个转接，主要靠的是pyxiaomigateway库