This is a setter, not a getter.

I'm sleepy.

Author: ZeroIntensity

Doc/c-api/function.rst

@@ -102,11 +102,14 @@ There are a few functions specific to Python functions.
    dictionary of arguments or ``NULL``.
 
 
-.. c:function:: PyObject* PyFunction_SetKwDefaults(PyObject *op, PyObject *defaults)
+.. c:function:: int PyFunction_SetKwDefaults(PyObject *op, PyObject *defaults)
 
    Set the keyword-only argument default values of the function object *op*.
    *defaults* must be a dictionary of keyword-only arguments or ``Py_None``.
 
+   This function returns ``0`` on success, and returns ``-1`` with an exception
+   set on failure.
+
 
 .. c:function:: PyObject* PyFunction_GetClosure(PyObject *op)