backport keyword argument support for bytearray.decode
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index b183cc1..0390c1d 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -2942,12 +2942,13 @@
 able to handle UnicodeDecodeErrors.");
 
 static PyObject *
-bytearray_decode(PyObject *self, PyObject *args)
+bytearray_decode(PyObject *self, PyObject *args, PyObject *kwargs)
 {
     const char *encoding = NULL;
     const char *errors = NULL;
+    static char *kwlist[] = {"encoding", "errors", 0};
 
-    if (!PyArg_ParseTuple(args, "|ss:decode", &encoding, &errors))
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|ss:decode", kwlist, &encoding, &errors))
         return NULL;
     if (encoding == NULL) {
 #ifdef Py_USING_UNICODE
@@ -3189,7 +3190,7 @@
      _Py_capitalize__doc__},
     {"center", (PyCFunction)stringlib_center, METH_VARARGS, center__doc__},
     {"count", (PyCFunction)bytearray_count, METH_VARARGS, count__doc__},
-    {"decode", (PyCFunction)bytearray_decode, METH_VARARGS, decode_doc},
+    {"decode", (PyCFunction)bytearray_decode, METH_VARARGS | METH_KEYWORDS, decode_doc},
     {"endswith", (PyCFunction)bytearray_endswith, METH_VARARGS, endswith__doc__},
     {"expandtabs", (PyCFunction)stringlib_expandtabs, METH_VARARGS,
      expandtabs__doc__},