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Tip revision: 02d1db9f46f2c9de879536206028a62d1a3f7bea authored by Larry Hastings on 29 March 2015, 22:34:26 UTC
Release bump for Python 3.5.0a3.
Release bump for Python 3.5.0a3.
Tip revision: 02d1db9
none.rst
.. highlightlang:: c
.. _noneobject:
The None Object
---------------
.. index:: 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.
It needs to be treated just like any other object with respect to reference
counts.
.. c:macro:: Py_RETURN_NONE
Properly handle returning :c:data:`Py_None` from within a C function (that is,
increment the reference count of None and return it.)