cycle_keyboard_brightness.py

'''Cycles keyboard brightness levels using DBus.'''
import dbus

def main():
    bus = dbus.SystemBus()
    proxy = bus.get_object('org.freedesktop.UPower',
                           '/org/freedesktop/UPower/KbdBacklight')
    interface = dbus.Interface(proxy, 'org.freedesktop.UPower.KbdBacklight')

    current_level = interface.GetBrightness()
    max_level = interface.GetMaxBrightness()

    interface.SetBrightness((current_level+1) % (max_level+1))

if __name__ == "__main__":
    main()