Re: [Pyobjc-dev] VTK bindings

[Ronald O. <ous...@ci...>]

On 6 dec 2003, at 20:40, Carlos Phillips wrote:

>> Do you parse the method arguments using PyArg_ParseTuple? See one of 
>> the method mappings in the Foundation and AppKit wrappers for an 
>> example of argument parsing.
>
>
> I have included my call_VTKView_renderer function below. I simply 
> ignore the arguments since the method renderer does not take any 
> arguments.
>
> Carlos
>
> static PyObject*
> call_VTKView_renderer(
>         PyObject* method, PyObject* self, PyObject* arguments)
> {
>   PyObject *result = 0;
>   VTKView *objc_self = 0;
>   vtkRenderer *renderer = 0;
>   const char *rendererAddr = 0;
>
>   // Get objc representation of self.
>   objc_self = PyObjC_PythonToId(self);
>
>   // Get the renderer
>   renderer = [objc_self renderer];
>
>   // Convert pointer to mangled form
>   rendererAddr = vtkPythonManglePointer(renderer, "p_vtkRenderer");
>
>   // Import the VTK module and get the vtkRenderer class
>   PyObject *vtk_module = PyImport_ImportModule("vtk");
>   PyObject *vtkRendererPyClass =
>     PyObject_GetAttrString(vtk_module, "vtkRenderer");
>
>   // Create a python object for renderer. If renderer has
>   // already been wrapped in python, then the existing python object
>   // is returned.
>   result = PyObject_CallObject(vtkRendererPyClass, Py_None);

This is the problem: Use PyObject_CallFunction(vtkRenderPyClass, "O", 
Py_None)  instead, CallObject expects an argument tuple (hence the 
error message you were getting).

BTW. The code below doesn't seem to use ``rendererAddr``.

Ronald