
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.)
