Hi
i work under CentOS 5.5, Qt 4.7, Python 2.4.
i need to send data from C++ to Python.
i write a code but it's not work, i have an Inferior System error on it.
PyObject* objArg = Py_BuildValue("(z)", cKeyNum);
PyObject* objFunc = (PyObject*)Init;
pValue = PyEval_CallObject(objFunc, objArg);
if there any know how to solve this problem please answer me .
Thanx
Please post the error.
The inferior stopped because it received a signal from the Operating System.
Signal name :
SIGSEGV
Signal meaning :
Segmentation fault
What is 'Init'? Where do you get it? Post all your code, if you can.
#ifndef QPYTHON_H
#define QPYTHON_H
#endif // QPYTHON_H
#include "python2.4/Python.h"
#include "QString"
#include "QFile"
#include "QTextStream"
#include "QSound"
#include "QMessageBox"
#include "phonon/AbstractAudioOutput"
#include "phonon/AbstractMediaStream"
#include "phonon/phonon"
class QPython
{
private:
QString strScript;
static QString strANI;
static QString strDNIS;
public:
QPython(){}
QPython(QString _strScript)
{strScript = _strScript;}
~QPython(){}
int PythonInitialize()
{
Py_Initialize();
return Py_IsInitialized();
}
int process_expression(char* cScript, char* cKeyNum)
{
PyObject *pValue;
static PyMethodDef dvoice[] = {
// "Python name", C Ffunction Code, Argument Flags, __doc__ description
{"playwave", playwave, METH_VARARGS, ""},
{"ClearDigitBuffer", ClearDigitBuffer, METH_NOARGS, ""},
{NULL, NULL, 0, NULL}
};
cKeyNum = "1";
try
{
PyObject *objModule = PyImport_ImportModule("main");
//PyObject *objArg = Py_BuildValue("(s)", cKeyNum);
//PyObject *objFunc = PyObject_GetAttrString(objModule, "main");
pValue = PyEval_CallObject(PyObject_GetAttrString(objModule, "main")
, Py_BuildValue("(s)", cKeyNum));
Py_DECREF(pValue);}
catch(QString strError)
{QMessageBox msg;
msg.setText(strError);
msg.exec();}
Py_InitModule("dvoice", dvoice);
return PyRun_SimpleString(cScript);
}
int process_expression_FILE(char *cFile, char* cKeyNum)
{
static PyMethodDef dvoice[] = {
// "Python name", C Ffunction Code, Argument Flags, __doc__ description
{"Init", Init, METH_VARARGS, ""},
{"playwave", playwave, METH_VARARGS, ""},
{"ClearDigitBuffer", ClearDigitBuffer, METH_NOARGS, ""},
{NULL, NULL, 0, NULL}
};
PyObject* objArg = Py_BuildValue("(0)", cKeyNum);
PyObject* objFunc = (PyObject*)Init;
PyEval_CallObject(objFunc, objArg);
Py_InitModule("dvoice", dvoice);
FILE* file_1 = fopen(cFile, "r");
return PyRun_SimpleFile(file_1, cFile);
}
void PythonFinalize()
{Py_Finalize();}
//, QString strWaveFile, QBool bSkip, int iFuture
static PyObject* playwave(PyObject* pSelf, PyObject* pArgs)
{
char* strWaveFile;
int *iSkip;
int *iFuture;
PyArg_ParseTuple(pArgs, "sii", &strWaveFile, &iSkip, &iFuture);
QString ster(strWaveFile);
Phonon::MediaObject *music = Phonon::createPlayer(Phonon::MusicCategory, Phonon::MediaSource(ster));
music->play();
}
static PyObject* ClearDigitBuffer(PyObject* pSelf, PyObject* pArgs)
{
}
};
the error causes in PyEval_CallObject() function
And what about the code that calls this object?
The PyEval_CallObject is in Python Classes i just call it.
I still don't see "Init" declared anywhere. It must be a global, if it's not declared inside the class. What is it? Have you checked the value to see if it's sane? Are you sure it's really a valid PyObject *?
first forget about Init.
Second it's a really a valid PyObject*.
If you insist. You should probably make sure both those pointers aren't NULL before you evalobject anything though, if something's gone wrong an error message instead of a crash would be good.
Thanks Corona688 but it's still got the same error.
Sorry, I can't help you without you telling me more about where these external objects come from. A segmentation fault usually means a bugged pointer, going past the bounds of an array, a bad typecast, etc, etc.
hi Corona688
the error is come from
pValue = PyEval_CallObject(PyObject_GetAttrString(objModule, "main")
, Py_BuildValue("(s)", cKeyNum));
---------- Post updated 10-04-10 at 04:58 AM ---------- Previous update was 10-03-10 at 07:11 AM ----------
Hi Corona688
i solve the problem and the code is work good
PyObject *objValue = NULL;
PyObject *objModule = NULL;
PyObject *objDict = NULL;
PyObject *objExpression = NULL;
PyObject *objArgs = NULL;
objDict = PyDict_New();
objModule = PyImport_AddModule("__main__");
//PyObject *objStrtoLong = ;
objArgs = Py_BuildValue("(s)", iKeyNum);
Py_IncRef(objModule);
objDict = PyModule_GetDict(objModule);
objExpression = PyDict_GetItemString(objDict, "main");
if(PyCallable_Check(objExpression))
{
objValue = PyObject_CallObject(objExpression, objArgs);
PyObject_CallMethod(objValue, "Sub", "(s)", iKeyNum);
}
else
{
// msg.setText("Not Callable");
// msg.exec();
}