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<BODY>Hello, I am trying to send a tuple to a method of a python class and I got a Run failed from netbeans compiler when I want to send a tuple to a simple method in a module it works,when I want to send a simple parameter to a method of a clas it works also but not a tuple to a method of a class I put the code below,thanks for all the possible suggestions Python Code: class cVector:   def __init__(self,msg):     self.value = msg   def ComputeNorm(self,vecData):     #don't use vecData for instance     result = 12.     return(result) C++ Code :   PyObject *ret, *mymod, *pclass, *method, *args, *object;   float retValue;   Py_Initialize();   //PySys_SetPath("/home/pascal/projPytCpp/proj1");   PySys_SetPath(".");     // Module   mymod = PyImport_ImportModule("mModule8");   if (mymod == NULL){     cout << "Can't Open a module:\n" ;     Py_DECREF(mymod);   }     // Class   pclass = PyObject_GetAttrString(mymod, "cVector");   if (pclass == NULL) {     Py_DECREF(pclass);     cout << "Can't find class\n";   }     // Parameters/Values   args = Py_BuildValue("(f)", 100.0);   if (args == NULL) {     Py_DECREF(args);     cout << "Can't build argument list for class instance\n";   }     // Object with parameter/value   object = PyEval_CallObject(pclass, args);   if (object == NULL) {     Py_DECREF(object);     cout << "Can't create object instance:\n";   }     // Decrement the argument counter as we'll be using this again   Py_DECREF(args);     // Get the object method - note we use the object as the object   // from which we access the attribute by name, not the class   method = PyObject_GetAttrString(object, "ComputeNorm");   if (method == NULL) {     Py_DECREF(method);     cout << "Can't find method\n";   }     // Decrement the counter for our object, since we now just need   // the method reference   Py_DECREF(object);   // Build our argument list - an empty tuple because there aren't   // any arguments     cout << "Prepare the Tuple:\n" ;   // WE pass a tuple   args = PyTuple_New( 3 );   if (args == NULL) {     Py_DECREF(args);     cout << "Can't build argument list for method call\n";   }     PyObject  *py_argument;   // 1st argument   py_argument = PyFloat_FromDouble(5.);   PyTuple_SetItem(args, 0, py_argument);     // 2nd argument   py_argument = PyFloat_FromDouble(10.);   PyTuple_SetItem(args, 1, py_argument);     // 3nd argument   py_argument = PyFloat_FromDouble(15.);   PyTuple_SetItem(args, 2, py_argument);     cout << "Before the Exec:\n" ;   // Call our object method with arguments (try two ways to do it any works)   //ret = PyEval_CallObject(method,args);   ret = PyObject_CallObject(method,args);   if (ret == NULL) {     Py_DECREF(ret);     cout << "Couldn't call method\n";   }     // Convert the return value back into a C variable and display it   PyArg_Parse(ret, "f", &retValue);   printf("Farenheit: %f\n", retValue);   // Kill the remaining objects we don't need   Py_DECREF(method);   Py_DECREF(ret);   // Close off the interpreter and terminate   Py_Finalize();   </BODY></HTML>

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