def __modify_fwm_service(self, method, fwmark, af, **svc_kwargs):
        netmask = (1 - (1 << 32)) if af == socket.AF_INET else 128
        out_msg = IpvsMessage(
            method, flags=netlink.MessageFlags.ACK_REQUEST,
            attr_list=IpvsCmdAttrList(
                service=IpvsServiceAttrList(
                    fwmark=fwmark,
                    flags=struct.pack(str('=II'), 0, 0),
                    af=af,
                    netmask=netmask,
                    **svc_kwargs
                )
            )
        )
        self.nlsock.execute(out_msg)
dataset/ETHPy150Open facebook/gnlpy/ipvs.py/IpvsClient.__modify_fwm_service/swapped operands of `-`