import usb.core
import usb.util
import sys
  
dev = usb.core.find(idVendor=0x16c0, idProduct=0x05df) 
if dev is None:
    sys.exit("No found in the system");
  
dev.set_configuration()
while 1:
	cadena = ""
	for i in dev.read(0x81,64,timeout=0):
		cadena += chr(i)
	print cadena

button up.
button down :
8
button up.
button down :9
button up.
button down :10
button u
p.
button down :11
button up.
button down :
12
button up.
button down :13
button up.
button down :14
button u

button down :15
button up.
button down :16
button up.
button down :17
button up.
button down :18
button up.
button down :19
button up.
button down :20
button up.
button down :21
button up.

>>> dev.read
<bound method Device.read of <DEVICE ID 16c0:05df on Bus 002 Address 005>>

data=dev.read(0x81,64,timeout=0)