Issue #20179: Apply Argument Clinic to bytes and bytearray.

Patch by Tal Einat.

Include/bytes_methods.h

@@ -21,8 +21,8 @@ extern void _Py_bytes_title(char *result, char *s, Py_ssize_t len);
 extern void _Py_bytes_capitalize(char *result, char *s, Py_ssize_t len);
 extern void _Py_bytes_swapcase(char *result, char *s, Py_ssize_t len);
 
-/* This one gets the raw argument list. */
+/* The maketrans() static method. */
-extern PyObject* _Py_bytes_maketrans(PyObject *args);
+extern PyObject* _Py_bytes_maketrans(PyObject *frm, PyObject *to);
 
 /* Shared __doc__ strings. */
 extern const char _Py_isspace__doc__[];

Misc/NEWS

@@ -10,6 +10,9 @@ Release date: TBA
 Core and Builtins
 -----------------
 
+- Issue #20179: Apply Argument Clinic to bytes and bytearray.
+  Patch by Tal Einat.
+
 - Issue #22082: Clear interned strings in slotdefs.
 
 - Upgrade Unicode database to Unicode 7.0.0.

Objects/bytes_methods.c

@@ -382,9 +382,9 @@ _getbuffer(PyObject *obj, Py_buffer *view)
 }
 
 PyObject *
-_Py_bytes_maketrans(PyObject *args)
+_Py_bytes_maketrans(PyObject *frm, PyObject *to)
 {
-    PyObject *frm, *to, *res = NULL;
+    PyObject *res = NULL;
     Py_buffer bfrm, bto;
     Py_ssize_t i;
     char *p;
@@ -392,8 +392,6 @@ _Py_bytes_maketrans(PyObject *args)
     bfrm.len = -1;
     bto.len = -1;
 
-    if (!PyArg_ParseTuple(args, "OO:maketrans", &frm, &to))
-        return NULL;
     if (_getbuffer(frm, &bfrm) < 0)
         return NULL;
     if (_getbuffer(to, &bto) < 0)