// c 程序 段
static PyObject *gc_before_extract = NULL;

/// 設置回調
static PyObject 
SetBeforeCallbackFn(PyObject dummy, PyObject args)
{
PyObject temp = NULL;
if (PyArg_ParseTuple(args, "O:set_callback", &temp)) {
   if (!PyCallable_Check(temp)) {
    PyErr_SetString(PyExc_TypeError, "parameter must be callable");
   }
   Py_XINCREF(temp);         / Add a reference to new callback /
   Py_XDECREF(gc_before_extract); / Dispose of previous callback /
   gc_before_extract = temp;       / Remember new callback /
}
return Py_BuildValue("l", (gc_before_extract == NULL) ? 0 : 1);
}
/// 調用上面函數設置的python腳本函數
int BeforeExt(char pBeforeExtract)
{
PyObject pArgs = NULL;
PyObject* pRetVal = NULL;
int    nRetVal = 0;
pArgs = Py_BuildValue("(s)", pFileName);
pRetVal = PyEval_CallObject(gc_before_extract, pArgs);
if (pRetVal)
{
   fprintf(stderr, "PyEval_CallObject : ok \r\n");
   nRetVal = PyInt_AsLong(pRetVal);
   fprintf(stderr, "PyEval_CallObject : return : %d \r\n", nRetVal);
}
Py_DECREF(pArgs);
Py_DECREF(pRetVal);
return nRetVal;
}
/// 測試函數
static 
PyObject my_test_callback(PyObject self, PyObject args) 
{ 
PyObject  arglist; 
PyObject * result = NULL;
BeforeExt("good");
result = PyEval_CallObject(gc_before_extract, args); 
if (result)
{
   Py_DECREF(result); 
}
Py_INCREF(Py_None); 
return Py_None; 
}</pre> 


/////// python 腳本
from pyArchive import 
from ctypes import 

回調函數必須有一個int型的返回值
def set_callback_fn(abc) :
    print "t_callback_fn say : {0}".format(abc)
    return 11
CMPFUNC = CFUNCTYPE(c_int, c_char_p) 
_callback = CMPFUNC(set_callback_fn)

if SetBeforeCallbackFn(_callback):
    print "set call back ok"
    my_test_callback("script call : good luck")
else :
    print "set call back fail"</pre>