Charging Ipad on linux, python script

gistfile1.py

#!/usr/bin/python

import usb.core
import usb.util
import usb.backend.libusb10
import sys, getopt

opts = getopt.getopt(sys.argv[1:],'',['off'])
off = 'off' in opts[1]

VENDOR_APPLE = 0x05ac
PRODUCT_IPAD1 = 0x129a
PRODUCT_IPAD2 = 0x129f

# find our device
dev = usb.core.find(idVendor=VENDOR_APPLE, idProduct=PRODUCT_IPAD1)
if not dev:
    dev = usb.core.find(idVendor=VENDOR_APPLE, idProduct=PRODUCT_IPAD2)

if dev is None:
    raise ValueError('Device not found')

usb.util.claim_interface(dev, 0)
dev.ctrl_transfer(usb.util.CTRL_TYPE_VENDOR|usb.util.CTRL_OUT, 0x40, 0x6400, 0x6400 if not off else 0, None, 2000)
usb.util.release_interface(dev, 0)