How to use the broadlink.__init__.a1 function in broadlink

0x2737,  # RM Mini
             0x273d,  # RM Pro Phicomm
             0x2783,  # RM2 Home Plus
             0x277c,  # RM2 Home Plus GDT
             0x272a,  # RM2 Pro Plus
             0x2787,  # RM2 Pro Plus2
             0x279d,  # RM2 Pro Plus3
             0x27a9,  # RM2 Pro Plus_300
             0x278b,  # RM2 Pro Plus BL
             0x2797,  # RM2 Pro Plus HYC
             0x27a1,  # RM2 Pro Plus R1
             0x27a6,  # RM2 Pro PP
             0x278f,  # RM Mini Shate
             0x27c2  # RM Mini 3
             ],
        a1: [0x2714],  # A1
        mp1: [0x4EB5,  # MP1
              0x4EF7  # Honyar oem mp1
              ],
        hysen: [0x4EAD],  # Hysen controller
        S1C: [0x2722],  # S1 (SmartOne Alarm Kit)
        dooya: [0x4E4D]  # Dooya DT360E (DOOYA_CURTAIN_V2)
    }

    # Look for the class associated to devtype in devices
    [device_class] = [dev for dev in devices if devtype in devices[dev]] or [None]
    if device_class is None:
        return device(host=host, mac=mac, devtype=devtype)
    return device_class(host=host, mac=mac, devtype=devtype)