gistfile1.txt

def get_ip_for_mac(box, mac):
    line = box.eval(['arp -n | grep ' + mac])
    if line:
        return line.split()[0]
    return None

def get_guest_ip(box, mac):
    while True:
        ip = get_ip_for_mac(box, mac)
        if ip:
            return ip
        time.sleep(0.5)

def new_random_mac():
    return'de:ad:be:ef:%02x:%02x' % (randrange(256), randrange(256))