#!/usr/bin/env python3

import sys
import subprocess
import os.path
import time

if not os.path.exists('/dev/video0'):
    print('/dev/video0 not found')
    sys.exit(1)

p = subprocess.Popen('udevadm info -q path /dev/video0'.split(),
                     stdout = subprocess.PIPE)
s = p.communicate()[0].decode('utf-8')
dev = s.split('/')[7]

with open('/sys/bus/usb/drivers/usb/unbind', 'w') as f:
    f.write(dev)

time.sleep(1)

with open('/sys/bus/usb/drivers/usb/bind', 'w') as f:
    f.write(dev)