mirror of https://github.com/python/cpython
27 lines
671 B
ReStructuredText
27 lines
671 B
ReStructuredText
.. highlight:: c
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.. _noneobject:
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The ``None`` Object
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-------------------
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.. index:: pair: object; None
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Note that the :c:type:`PyTypeObject` for ``None`` is not directly exposed in the
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Python/C API. Since ``None`` is a singleton, testing for object identity (using
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``==`` in C) is sufficient. There is no :c:func:`PyNone_Check` function for the
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same reason.
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.. c:var:: PyObject* Py_None
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The Python ``None`` object, denoting lack of value. This object has no methods
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and is `immortal <https://peps.python.org/pep-0683/>`_.
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.. versionchanged:: 3.12
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:c:data:`Py_None` is immortal.
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.. c:macro:: Py_RETURN_NONE
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Return :c:data:`Py_None` from a function.
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