import usb.core
import usb.util

#find our device
dev = usb.core.find(idVendor=0x04D8, idProduct=0x0204)

#was it found?
if dev is None:
    raise ValueError('Device not found')

#set the active configuration. with no args we use first config.
dev.set_configuration()

#get in and out endpoint instances
ep_out = usb.util.find_descriptor(
        dev.get_interface_altsetting(),   # first interface
        # match the first OUT endpoint
        custom_match = \
            lambda e: \
                usb.util.endpoint_direction(e.bEndpointAddress) == \
                usb.util.ENDPOINT_OUT
    )

ep_in = usb.util.find_descriptor(
        dev.get_interface_altsetting(),   # first interface
        # match the first IN endpoint
        custom_match = \
            lambda e: \
                usb.util.endpoint_direction(e.bEndpointAddress) == \
                usb.util.ENDPOINT_IN
    )

#turn light on
ep_out.write([0x080])

#recieve data
ep_out.write([0x081])
ep_in.read(8)