let inline pyWith(pyObj: PyObject, func: PyObject -> 'T) =
        let mutable ptr: PyObject option = None // this is F# None, in C# implementation you can use ``null`` instead 
        let mutable ptr2: PyObject option = None // this is F# None
        let mutable ptr3: PyObject option = None // this is F# None
        let mutable ex : PythonException = null;
        let mutable res : 'T option = None // this is F# None

        try 
            let obj2: PyObject = pyObj.InvokeMethod("__enter__");
            
            res <- Some <| func(obj2)
        with
        | :? PythonException as ex2 ->            
            ex <- ex2;
            ptr <- Some <| PyObject ex.PyType
            ptr2 <- Some <| PyObject ex.PyValue;
            ptr3 <- Some <| PyObject ex.PyTB;

        let toPyNoneIfEmpty(o: PyObject option) = o |> Option.defaultWith(fun () -> Runtime.GetPyNone()) // Runtime.GetPyNone() pythonnet_standard alternative of Py.None

        let exitObject : PyObject = pyObj.InvokeMethod("__exit__", ptr |> toPyNoneIfEmpty, ptr |> toPyNoneIfEmpty, ptr2 |> toPyNoneIfEmpty, ptr3 |> toPyNoneIfEmpty);
        
        if (ex |> isNull |> not && not <| exitObject.IsTrue()) then
            raise ex

        res |> Option.get