#!/usr/bin/python3.4
# -*- coding=utf-8 -*-

import os
import re
def get_mac_address(iface):
    #data = commands.getoutput("ifconfig " + iface)
    data = os.popen("ifconfig " + iface).read()
    words = data.split()
    found = 0
    location = 0
    index = 0
    for x in words:
        if re.match('\w\w:\w\w:\w\w:\w\w:\w\w:\w\w', x):
            found = 1
            index = location
            break
        else:
            location = location + 1
    if found == 1:
        mac = words[index]
    else:
        mac = 'Mac not found'
    return mac

if __name__ == "__main__":
    print(get_mac_address('eno33554944'))