PyMODINIT_FUNC和PyModule_Create之间的区别 [英] Difference between PyMODINIT_FUNC and PyModule_Create

问题描述

如果我理解正确，

Python 2.X中的
1. PyMODINIT_FUNC已在Python3.X中由PyModule_Create取代

2. 都返回PyObject*，但是，在Python 3.X中，模块的初始化函数 必须 将PyObject*返回到模块-即

1. PyMODINIT_FUNC in Python 2.X has been replaced by PyModule_Create in Python3.X

2. Both return PyObject*, however, in Python 3.X, the module's initialization function MUST return the PyObject* to the module - i.e.

PyMODINIT_FUNC
PyInit_spam(void)
{
   return PyModule_Create(&spammodule);
}

而在Python2.X中，则没有必要-即

whereas in Python2.X, this is not necessary - i.e.

PyMODINIT_FUNC
initspam(void)
{
  (void) Py_InitModule("spam", SpamMethods);
}

因此，我的健全性检查问题是:

So, my sanity checking questions are:

• 我的理解正确吗?
• 为什么要进行此更改?

现在，我仅在试验非常简单的Python C扩展案例.也许如果我做更多的事情，答案很明显，或者如果我正在尝试将Python嵌入其他东西中…….

Right now, I'm only experimenting with very simple cases of C-extensions of Python. Perhaps if I were doing more, the answer to this would be obvious, or maybe if I were trying to embed Python into something else....

推荐答案

1. 是的，您的理解是正确的.您必须使用返回类型PyMODINIT_FUNC从初始化函数返回新的模块对象. (PyMODINIT_FUNC声明该函数在python2中返回void，并在python3中返回PyObject *.)

1. Yes, your understanding is correct. You must return the new module object from the initing function with return type PyMODINIT_FUNC. (PyMODINIT_FUNC declares the function to return void in python2, and to return PyObject* in python3.)

我只能推测做出更改的人员的动机，但是我相信这样做是为了可以更轻松地识别导入模块的错误(您可以从module-init函数返回NULL)在python3中，如果出现问题).

I can only speculate as to the motivations of the people who made the change, but I believe it was so that errors in importing the module could be more easily identified (you can return NULL from the module-init function in python3 if something went wrong).

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