The None Object — Python 3.9.25 documentation

Note that the

PyTypeObject

for None is not directly exposed in the Python/C API. Since None is a singleton, testing for object identity (using == in C) is sufficient. There is no PyNone_Check() function for the same reason.

PyObject

* Py_None

¶

The Python None object, denoting lack of value. This object has no methods. It needs to be treated just like any other object with respect to reference counts.

Py_RETURN_NONE

¶

Properly handle returning

Py_None

from within a C function (that is, increment the reference count of None and return it.)