The None Object

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 and is immortal.

Changed in version 3.12: Py_None is immortal.

Py_RETURN_NONE

Return Py_None from a function.