This document is for an old version of Python that is no longer supported. You should upgrade, and read the Python documentation for the current stable release.

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. 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.)

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