all macs

allmacs.py

#!/usr/bin/env python
"""Return all non-zero Ethernet (6 octets) MAC addresses"""

import itertools
import re

import netifaces

MAC_REGEXP = re.compile("^([0-9A-Fa-f]{2}:){5}([0-9A-Fa-f]{2})$")

def all_mac_addrs(x):
    return [i['addr'] for i in x[netifaces.AF_LINK]]

def is_nonzero_ethernet(x):
    return (MAC_REGEXP.match(x) and x != ':'.join(['00']*6))

def get_all_eth_macs():
    return filter(
        is_nonzero_ethernet,
        itertools.chain.from_iterable(
            map(
                all_mac_addrs,
                map(
                    netifaces.ifaddresses,
                    netifaces.interfaces()
                 )
             )
        )
    )

if __name__ == "__main__":
    print(get_all_eth_macs())