why i get this? , line 17 subprocess.call(["ifconfig", interface, "down"]) ^ SyntaxError: invalid syntax

Question

#!/usr/bin/python3


import subprocess
import optparse


def get_arguments():
        parser = optparse.OptionParser()
        parser.add_option("-i", "--interface", dest="interface", help="goo")
        parser.add_option("-m", "--mac", dest="new_mac", help="yeees")
        return parser.parse_args()

def change_mac (interface, new_mac):
        print ("changing MAC ADDRESS FOR :{} to {}" (interface, new_mac)
        subprocess.call(["ifconfig", interface, "down"])     ## the problem
        subprocess.call(["ifconfig", interface, "hw ", " ether ", new_mac])
        subprocess.call(["ifconfig", interface, "up"])

get_arguments()
change_mac (options.interface, options.new_mac)