OpcUa 获取节点值函数 get_data_value() 和get_value() 的区别

var = client.get_node(ua.NodeId(2, 2))
var.set_value(ua.Variant([23], ua.VariantType.Int64))
        print(var.get_data_value()) # DataValue(Value:Variant(val:[23],type:VariantType.Int64), StatusCode:StatusCode(Good), SourceTimestamp:2021-09-17 06:27:52.307762)
        print(var.get_value()) # [23]