#!/usr/bin/env python
-from abc import abstractmethod
+from abc import abstractmethod, ABCMeta
from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet import IP, UDP
class BridgeDomain(object):
""" Bridge domain abstraction """
+ __metaclass__ = ABCMeta
@property
def frame_pg0_to_pg1(self):