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Co-authored-by: Sergey B Kirpichev <[email protected]>

Author: sayandipdutta

Doc/library/functools.rst

@@ -480,6 +480,7 @@ The :mod:`functools` module defines the following functions:
 
    See :func:`itertools.accumulate` for an iterator that yields all intermediate
    values.
+
    .. versionchanged:: 3.14
       *initial* is now supported as a keyword argument.
 

Modules/_functoolsmodule.c

@@ -941,7 +941,8 @@ functools_reduce(PyObject *self, PyObject *args, PyObject *kwargs)
     static char *keywords[] = {"", "", "initial", NULL};
 
     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO|O:reduce", keywords,
-                                     &func, &seq, &result)) {
+                                     &func, &seq, &result))
+    {
         return NULL;
     }
 
@@ -1724,7 +1725,7 @@ PyDoc_STRVAR(_functools_doc,
 "Tools that operate on functions.");
 
 static PyMethodDef _functools_methods[] = {
-    {"reduce", functools_reduce, METH_VARARGS|METH_KEYWORDS,
+    {"reduce", _PyCFunction_CAST(functools_reduce), METH_VARARGS|METH_KEYWORDS,
         functools_reduce_doc},
     _FUNCTOOLS_CMP_TO_KEY_METHODDEF
     {NULL,              NULL}           /* sentinel */