Obtaining the PyObject * of a class

[Cooper, Andrew]

I',m currently using SWIG to generate a python interface to a C DLL.

I'm new to the Python C API and have a question that has been stumping
me for the last week.
As part of the wrapper process I want to hide some of the complexity
with dealing with handles using a python class.

But the problem I have is I don't know how to get the PyObject* that
refers to the class Pin that I have defined in the %pythoncode section

Here is a cut down version of the interface file

%module example

typedef long pin;
typedef unsigned short ushort;

ushort wkDefinePin(char *, char *, pin *OUTPUT);

%pythoncode
{
class Pin(object):
def __init__(self, name, tic):
self.handle = wkDefinePin(name,tic)[1]
return
}



%typemap(in) (pin tp)
{
//
// TODO: really need to change this to IsInstance type code
//
if(strcmp($input->ob_type->tp_name,"Pin") == 0)
{
$1 = PyInt_AsLong(PyObject_GetAttrString($input,"handle"));
}
else
{
PyErr_SetString(PyExc_TypeError,"arg must be type Pin");
return NULL;
}
}

%typemap(in) (int nCnt_tp, pin *tp)
{
/* Check if is a list */
if (PyList_Check($input))
{
int i;
$1 = PyList_Size($input);
$2 = (pin *) malloc(($1) * sizeof(pin));
for (i = 0; i < $1; i++)
{
//
// TODO: really need to change this to IsInstance type code
//
PyObject *o = PyList_GetItem($input,i);
if (strcmp(o->ob_type->tp_name, "Pin") == 0)
{
$2 = PyInt_AsLong(PyObject_GetAttrString(o,"handle"));
}
else
{
PyErr_SetString(PyExc_TypeError,"list must contain Pins");
free($2);
return NULL;
}
}
$2 = 0;
}
else
{
PyErr_SetString(PyExc_TypeError,"not a list");
return NULL;
}
}