gh-145118: Add frozendict support to str.maketrans() (gh-145129)

Add support to `str.maketrans`

Author: StanFromIreland

Lib/test/test_str.py

@@ -454,6 +454,13 @@ def test_maketrans_translate(self):
         self.assertEqual("[a\xe9]".translate(str.maketrans({'a': '<\u20ac>'})),
                          "[<\u20ac>\xe9]")
 
+        # with frozendict
+        tbl = self.type2test.maketrans(frozendict({'s': 'S', 'T': 't'}))
+        self.assertEqual(tbl, {ord('s'): 'S', ord('T'): 't'})
+        self.assertEqual('sTan'.translate(tbl), 'Stan')
+        tbl = self.type2test.maketrans(frozendict({'a': None, 'b': '<i>'}))
+        self.checkequalnofix('<i><i><i>c', 'abababc', 'translate', tbl)
+
         # invalid Unicode characters
         invalid_char = 0x10ffff+1
         for before in "a\xe9\u20ac\U0010ffff":

Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-22-05-09.gh-issue-145118.TaKMJE.rst

@@ -0,0 +1 @@
+:meth:`str.maketrans` now accepts :class:`frozendict`.

Objects/unicodeobject.c

@@ -13149,7 +13149,7 @@ unicode_maketrans_impl(PyObject *x, PyObject *y, PyObject *z)
         const void *data;
 
         /* x must be a dict */
-        if (!PyDict_CheckExact(x)) {
+        if (!PyAnyDict_CheckExact(x)) {
             PyErr_SetString(PyExc_TypeError, "if you give only one argument "
                             "to maketrans it must be a dict");
             goto err;