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The None Object

.. index:: pair: object; None

Note that the :c:type:`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 :c:func:`PyNone_Check` function for the same reason.

.. c:var:: PyObject* Py_None

   The Python ``None`` object, denoting lack of value.  This object has no methods
   and is `immortal <https://peps.python.org/pep-0683/>`_.
.. versionchanged:: 3.12
   :c:data:`Py_None` is immortal.
.. c:macro:: Py_RETURN_NONE

   Return :c:data:`Py_None` from a function.