SWIG -- Passing python proxy class instance to python callback

Keith Sabine keiths at apache-da.com
Fri Jun 6 17:52:17 CEST 2008


Hi

Did you ever find a solution to this? I am having the exact same problem...

- Keith

I'm trying to pass a proxy class instance (SWIG generated) of CClass,
to a python callback function from C++.  The proxy class instance of
CClass is created from a pointer to the C++ class CClass.

Using the code below, I receive the error message:

"AttributeError: 'PySwigObject' object has no attribute 'GetName'"


The python callback function is being passed in through the clientdata
pointer, and the CClass *class pointer is what's being converted to an
instance of the SWIG proxy class and passed to the python callback
function as an argument.

static void PythonCallBack(CClass *class,void *clientdata)
{
   PyObject *func, *arglist,*obj;
   PyObject *result;

   func = (PyObject *) clientdata;   // Get Python function
   obj = SWIG_NewPointerObj((void*) cmd, SWIGTYPE_p_CSCSICommand,  1);
//create instance of python proxy class from c++ pointer

   arglist=Py_BuildValue("(O)",*obj); //convert to tuple
   result = PyEval_CallObject(func,arglist);     // Call Python

   Py_XDECREF(result);
   return;
}

Any input would greatly appreciated.  Thanks,
Jeff





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