How to change a linux mac address with Python

mac_address_changer.py

#!/usr/bin/env python3

import subprocess
import optparse

'''
Readme.md
To run this application 
python3 main.py -i etho -m 00:11:22:33:44:55

NOTE: 
The value of the mac_address (m) must be 12 digits with each two separated by : as seen above
The value of the interface must be eth0 (if you wish to change only the mac address of your linux

Credits : https://www.udemy.com/course/learn-python-and-ethical-hacking-from-scratch/
'''

def get_args():
    parser = optparse.OptionParser()
    parser.add_option('-i', '--interface', dest='interface', help='Interface to change the mack address')
    parser.add_option('-m', '--mac', dest='new_mac', help='New mac address')
    (options, arguments) = parser.parse_args()
    if not options.interface:
        parser.error('[-] please specify an interface, use --help for more info.')
    elif not options.new_mac:
        parser.error('[-] please specify a new mac address, use --help for more info.')
    return options


def change_mac(interface, new_mac):
    print('[+] Changing MAC Address for ' + interface + ' to ' +  new_mac)
    subprocess.call(['ifconfig', interface, 'down'])
    subprocess.call(['ifconfig', interface, 'hw', 'ether', new_mac])
    subprocess.call(['ifconfig', interface, 'up'])

options = get_args()
change_mac(options.interface, options.new_mac)