Object initialization in Pythonnet

Question

Let's assume I've the following C# class:

public class Test
{
    public double X;
    public double Y;
}

I want to use the above C# Test class from IronPython and as well from CPython (using Pythonnet).

Using IronPython 2.7 I was able to generate an object and initializes the fields using object initialization, see the following Python code:

obj = Test(X = 1.0, Y = 2.0)

See as well the following question Object initialization in IronPython

Using CPython 3.9.7 and Pythonnet 3.01 the above code returns the following error:

TypeError: No method matches given arguments for Test..ctor: ()

As workaround I can use the following Python code:

obj = Test()
obj.X = 1.0
obj.Y = 2.0

But I would like to use object initialization.

Answer 1

Not sure if I get your question, but try this:

Test test = New Test();
/* or */ var test = New Test();
/* then */ test.x = whatever;

Answer 2

You can do this in two ways in C#:

1. Object Initializer approach:

   var obj = new Test { X = 1.0, Y = 2.0 };
   

2. The constructor approach. For this approach you must add a constructor to the class:

   public class Test
   {
       public double X;
       public double Y;
   
       public Text( double x, double y)
       {
           X = x;
           Y = y;
       }
   }
   

   Then you can create the object with:

   var obj = new Test(1.0, 2.0);