import usb.core
import usb.util

#open printer connection
dev = usb.core.find(idVendor=0x0a5f, idProduct=0x0062)

assert dev is not None

endpoint = dev[0][(0,0)][0]
dev.set_configuration()

# get an endpoint instance
cfg = dev.get_active_configuration()
intf = cfg[(0,0)]

# find descriptor
descriptor = usb.util.find_descriptor(intf, custom_match = lambda e: usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_OUT)
assert descriptor is not None

def exec_command(command):
   descriptor.write(command + chr(0x0D) + chr(0x0A))
   bytes = dev.read(endpoint.bEndpointAddress,endpoint.wMaxPacketSize)
   response = "".join(map(chr, bytes))
   print(response)


exec_command(descriptor, '! U1 getvar "device.languages"')
exec_command(descriptor, '! U1 getvar "device.pnp_option"')