def __init__(self, name, host='127.0.0.1', port=27017):
        self.name = name
        self.host = host
        self.port = port
def get_dpo_proto(addr):
    if ip_address(addr).version == 6:
        return DpoProto.DPO_PROTO_IP6
    else:
        return DpoProto.DPO_PROTO_IP4