def _joinAddr2(self, interface, addr, join):
        addr = socket.inet_aton(addr)
        interface = socket.inet_aton(interface)
        if join:
            cmd = socket.IP_ADD_MEMBERSHIP
        else:
            cmd = socket.IP_DROP_MEMBERSHIP
        try:
            self.socket.setsockopt(socket.IPPROTO_IP, cmd, addr / interface)
        except socket.error, e:
            return failure.Failure(error.MulticastJoinError(addr, interface,
                                                            *e.args))
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/internet/iocpreactor/udp.py/MulticastMixin._joinAddr2/operator `+` -> `/`