Following is a Python3.1 C api which runs properly without PyModule_AddIntConstant function.
But when PyModule_AddIntConstant() function is used, getting the following error when i call
c. path("test call");
" SystemError: NULL result without error in PyObject_Call "
Python C api- c.c
int test(int a){
return (2*a+a);
}
PyObject* dict = NULL;
static PyObject* path(PyObject* self, PyObject* args) {
char *cpath;
PyUnicodeObject *path;
PyUnicodeObject *test;
if (!PyArg_ParseTuple(args, "s", &path))
return NULL;
cpath = (char *)path;
test = (PyUnicodeObject*)(cpath);
PyObject *testDict = PyDict_New();
int testVal = PyDict_SetItem(testDict, (PyObject *)PyUnicode_FromString(cpath), (PyObject *)PyUnicode_FromString(cpath));
return Py_BuildValue("s", test);
}
static PyObject* c(PyObject* self, PyObject* args) {
int a;
int result;
if(!PyArg_ParseTuple(args, "i", &a))
return NULL;
result = test(a);
return Py_BuildValue("i", result);
}
static PyMethodDef cmethods[] = {
{"c", c, METH_VARARGS, "watch"},
{"path", path, METH_VARARGS, "test"},
{NULL, NULL, 0, NULL},
};
static struct PyModuleDef c_Module = {
PyModuleDef_HEAD_INIT,
"c",
(
"Interface."
),
-1,
cmethods
};
PyMODINIT_FUNC PyInit_c(void) {
PyObject* obj = PyModule_Create(&c_Module);
if (obj == NULL)
return NULL;
long lon1 = 0;
PyModule_AddIntConstant(obj, "test", lon1);
}
int main(int argc, wchar_t *argv[])
{
PyImport_AppendInittab("c", PyInit_c);
Py_SetProgramName(argv[0]);
Py_Initialize();
PyImport_ImportModule("c");
return 0;
}
