my_mac_changer.py

import subprocess
import optparse
import re

def get_user_input():
    parse_object = optparse.OptionParser()
    parse_object.add_option("-i", "--interface", dest="interface", help="interface to change!")
    parse_object.add_option("-m","--mac", dest="mac_address", help="new mac address")

    return parse_object.parse_args()

def change_mac_address(user_interface, user_mac_address):
    subprocess.call(["ifconfig", user_interface, "down"])
    subprocess.call(["ifconfig", user_interface, "hw" , "ether", user_mac_address])
    subprocess.call(["ifconfig", user_interface, "up"])

def control_new_mac(interface):
    ifconfig = subprocess.check_output(["ifconfig",interface])
    new_address = re.search(r"\w\w:\w\w:\w\w:\w\w:\w\w:\w\w", str(ifconfig))

    if new_address:
        return new_address.group(0)
    else:
        return None

print("MyMacChanger Started!")
(user_input, arguments) = get_user_input()
change_mac_address(user_input.interface, user_input.mac_address)
finalized_mac_address = control_new_mac(str(user_input.interface))


if finalized_mac_address == user_input.mac_address:
    print("Success!!")
else:
    print("Error!!")