拜求，python没法给结构体赋值

            element1=Matrix3x3()
            element1.Xx = X.X
            element1.Xy = X.Y
            element1.Xz = X.Z
            element1.Yx = Y.X
            element1.Yy = Y.Y
            element1.Yz = Y.Z
            element1.Zx = Z.X
            element1.Zy = Z.Y
            element1.Zz = Z.Z
            theUI.NXMessageBox.Show("Error", NXMessageBox.DialogType.Warning,X.X.ToString())  
            theUI.NXMessageBox.Show("Error", NXMessageBox.DialogType.Warning,element1.Xx.ToString())  

X.X.ToString（）显示11.033
但是，element1.Xx.ToString()显示为0

好奇怪啊
[解决办法]
ToString 不清楚？X.X是什么？？