https://github.com/python/cpython/commit/ea1ecf6504f4dd9e9eecc401c2d2242140cab0cd
commit: ea1ecf6504f4dd9e9eecc401c2d2242140cab0cd
branch: 3.13
author: Miss Islington (bot) <[email protected]>
committer: serhiy-storchaka <[email protected]>
date: 2026-01-11T19:47:05Z
summary:

[3.13] gh-127750: Fix annotations in singledispatchmethod signature tests 
(GH-143571) (GH-143708)

These tests relied on a bug -- gh-84644, which is that singledispatch
doesn't verify the annotation is on the "first" parameter.
(cherry picked from commit 620a5b92693ac1b2cef1f90fd3c2dba1bb794552)

Co-authored-by: Bartosz SÅ‚awecki <[email protected]>

files:
M Lib/test/test_functools.py

diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
index a204fd9aaf9702..e042a7909ef05b 100644
--- a/Lib/test/test_functools.py
+++ b/Lib/test/test_functools.py
@@ -3151,16 +3151,11 @@ def _(item: int, arg: bytes) -> str:
 
     def test_method_signatures(self):
         class A:
-            def m(self, item, arg: int) -> str:
-                return str(item)
-            @classmethod
-            def cm(cls, item, arg: int) -> str:
-                return str(item)
             @functools.singledispatchmethod
             def func(self, item, arg: int) -> str:
                 return str(item)
             @func.register
-            def _(self, item, arg: bytes) -> str:
+            def _(self, item: int, arg: bytes) -> str:
                 return str(item)
 
             @functools.singledispatchmethod
@@ -3169,7 +3164,7 @@ def cls_func(cls, item, arg: int) -> str:
                 return str(arg)
             @func.register
             @classmethod
-            def _(cls, item, arg: bytes) -> str:
+            def _(cls, item: int, arg: bytes) -> str:
                 return str(item)
 
             @functools.singledispatchmethod
@@ -3178,7 +3173,7 @@ def static_func(item, arg: int) -> str:
                 return str(arg)
             @func.register
             @staticmethod
-            def _(item, arg: bytes) -> str:
+            def _(item: int, arg: bytes) -> str:
                 return str(item)
 
         self.assertEqual(str(Signature.from_callable(A.func)),

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