How to raise corresponding Python exception from Nim about nimpy HOT 1 CLOSED

static PyObject* pNimException;
// m is the Python module where you want the exception to be created.
PyModule_AddObject(m, "NimException",  pNimException);

void throwNimPythonException(char * str) {
    pNimException = PyErr_NewException("_lib.NimException", NULL, NULL);
    PyErr_SetString(pNimException, str);
    Py_INCREF(pNimException);
}

// this is the wrapper function that should be generated in order to raise the error
c_wrapper_function(
        throwNimPythonException(str);
        return NULL;
}