Could this C extension be leaking memory?

[Sam L.]

I am trying this out, parts of it are direct from the Python 2.4
manual.

//----------- icallbk.c
#include "Python.h"
PyObject *fcallback = NULL;

static PyObject*
call_func(PyObject* self, PyObject* args)
{
  PyObject *result;
  PyObject *arglist;
  int arg = 123;

  arglist = Py_BuildValue("(i)", arg);
  result = PyEval_CallObject(fcallback, arglist);
  Py_DECREF(arglist);
  Py_DECREF(result);
  Py_RETURN_NONE;
}

static PyObject *
set_callback(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(fcallback);  /* Dispose of previous callback */
        fcallback = temp;       /* Remember new callback */
        /* Boilerplate to return "None" */
        Py_INCREF(Py_None);
        result = Py_None;
    }
    return result;
}

static PyMethodDef icallbk_methods[] = {
    { "call_func", call_func, METH_VARARGS, "call_func" },
    { "set_callback", set_callback, METH_VARARGS, "set_callback" },
    { 0,0,0,0 }
};

PyMODINIT_FUNC
initicallbk(void)
{
    (void) Py_InitModule("icallbk", icallbk_methods);
}
"""

I use the following code to run the extension above.

"""
# cb.py: Code to run the extension above.
import icallbk as c
def f(a): print a
c.set_callback(f)
c.call_func()
"""


But when I run that for a hundred times, I think the system is losing
100KB or thereabouts that is no longer re-claimed. Can someone confirm
this, and if it so, kindly inform me what is wrong with the code?

Thanks