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Python/C API Reference Manual

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7.1.2 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.