import fcntl
import socket
import struct


def get_hw_addr(interface):
    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as s:
        info = fcntl.ioctl(s.fileno(), 0x8927, struct.pack('256s', interface[:15].encode()))
        return ':'.join('%02x' % i for i in info[18:24])


def get_ethernet_addr(interface):
    with socket.socket(socket.AF_PACKET, socket.SOCK_RAW) as s:
        s.bind((interface, 0))
        _, _, _, _, addr = s.getsockname()
        return ':'.join('%02x' % i for i in addr)


if __name__ == '__main__':
    print(get_hw_addr('enp0s3'))
    print(get_ethernet_addr('enp0s3'))