如何在python扩展中访问/检索PyObject的成员变量

#include <Python.h>

typedef struct {
    PyObject_HEAD
    int value;
} MyObject;

static PyObject* MyObject_get_value(MyObject* self, PyObject* args) {
    return PyLong_FromLong(self->value);
}

static PyMethodDef MyObject_methods[] = {
    {"get_value", (PyCFunction)MyObject_get_value, METH_NOARGS, "Get the value of the object"},
    {NULL, NULL, 0, NULL}
};

static PyMemberDef MyObject_members[] = {
    {"value", T_INT, offsetof(MyObject, value), 0, "The value of the object"},
    {NULL}
};

static PyTypeObject MyObjectType = {
    PyVarObject_HEAD_INIT(NULL, 0)
    .tp_name = "my_module.MyObject",
    .tp_basicsize = sizeof(MyObject),
    .tp_itemsize = 0,
    .tp_flags = Py_TPFLAGS_DEFAULT,
    .tp_new = PyType_GenericNew,
    .tp_methods = MyObject_methods,
    .tp_members = MyObject_members,
};

static PyModuleDef my_module = {
    PyModuleDef_HEAD_INIT,
    .m_name = "my_module",
    .m_size = -1,
};

PyMODINIT_FUNC PyInit_my_module(void) {
    PyObject* module;

    if (PyType_Ready(&MyObjectType) < 0)
        return NULL;

    module = PyModule_Create(&my_module);
    if (module == NULL)
        return NULL;

    Py_INCREF(&MyObjectType);
    PyModule_AddObject(module, "MyObject", (PyObject*)&MyObjectType);

    return module;
}