Ошибка в Python/C - TypeError: an integer is required (got type dict)

Запускаю код, возникает ошибка -

TypeError: an integer is required (got type dict)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
SystemError: <built-in function test> returned a result with an error set

Код:

PyObject *list;
    if (!PyArg_ParseTuple(args, "O", &list)) {
        return NULL;
    }
    int b = 0;
    if (list != NULL) {
        PyObject *iter = PyObject_GetIter(list);
        while (1) {
            PyObject *next = PyIter_Next(iter);
            if (next == NULL)
                break;
            if (PyDict_Check(next)) {
                PyObject *p = PyDict_GetItemString(next, "text");
                if (p != NULL) {
                    if (PyLong_Check(p)) {
                        b += PyLong_AsLong(next);
                    }
                }
            }
        }
    }
    return Py_BuildValue("i", b);