1 .. highlightlang:: c

     2 

     3 .. _noneobject:

     4 

     5 The None Object

     6 ---------------

     7 

     8 .. index:: object: None

     9 

    10 Note that the :ctype:`PyTypeObject` for ``None`` is not directly exposed in the

    11 Python/C API.  Since ``None`` is a singleton, testing for object identity (using

    12 ``==`` in C) is sufficient. There is no :cfunc:`PyNone_Check` function for the

    13 same reason.

    14 

    15 

    16 .. cvar:: PyObject* Py_None

    17 

    18    The Python ``None`` object, denoting lack of value.  This object has no methods.

    19    It needs to be treated just like any other object with respect to reference

    20    counts.

    21 

    22 

    23 .. cmacro:: Py_RETURN_NONE

    24 

    25    Properly handle returning :cdata:`Py_None` from within a C function.

    26 

    27    .. versionadded:: 2.4

    28