[Pythonmac-SIG] Callback function problems

[Matthew Smith]

Hello

If this is better suited to a general python list then sorry...

I'm having problems setting up and using a callback function in my program
that embeds python. I am using the following code:

static PyObject *setTempCallback(PyObject *self, PyObject* args)
{
    PyObject *result = NULL;
    PyObject *temp;

    if (PyArg_ParseTuple(args, "O:set_callback", &temp))
    {
        if (!PyCallable_Check(temp))
        {
            PyErr_SetString(PyExc_TypeError, "parameter must be callable");
            return NULL;
        }
        Py_XINCREF(temp);         /* Add a reference to new callback */
        Py_XDECREF(pythonCallback);  /* Dispose of previous callback */
        pythonCallback = temp;       /* Remember new callback */
        
        // return none
        Py_INCREF(Py_None);
        result = Py_None;
    }
    return result;
}


Then when I want to use the python function:

void callPythonFunc(long x, long y)
{
    PyObject *arglist;
    PyObject *result;
    long smaller;
    
    arglist = Py_BuildValue("[l,l]", x, y);
    result = PyEval_CallObject(pythonCallback, arglist);
    Py_DECREF(arglist);
    
    if (result == NULL)
        return;
    
    // use result

    // get the arguments
    if (!PyArg_ParseTuple(result, "l", &smaller))
        return;

    printf("the smaller number %d\n", smaller);
    
    Py_DECREF(result);
}

Only "if (result == NULL)" always fails... I tried to put the code in
callPythonFunc into setTempCallback to see if the PyObject, pythonCallback
is having trouble but to no avail. Any ideas??

I'm also attempting to load a module (myModule.py) from another (main.py)
that is run using the following:

err = !PyRun_SimpleString("execfile(\"main.py\")\n");

But I get this error:

Traceback (most recent call last):
  File "<string>", line 1, in ?
  File "main.py", line 12, in ?
    import myModule # import the python module
ImportError: No module named myModule

PythonBinder.app has exited with status 0.


Both main.py and myModule.py are in the same directory as the executable...


Thanks for any help,

Matt Smith