From 2e0b8687599fa033e78978dc78c42afa86934913 Mon Sep 17 00:00:00 2001
From: Ivan Levkivskyi <levkivskyi@gmail.com>
Date: Sat, 6 Jul 2024 21:05:46 +0100
Subject: [PATCH] Revert "Have namedtuple `__replace__` return `Self`" (#17496)

Reverts python/mypy#17475
---
 mypy/semanal_namedtuple.py           |  4 +---
 test-data/unit/check-namedtuple.test | 16 +---------------
 2 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/mypy/semanal_namedtuple.py b/mypy/semanal_namedtuple.py
index bf526a1ee990..768dd265b338 100644
--- a/mypy/semanal_namedtuple.py
+++ b/mypy/semanal_namedtuple.py
@@ -57,7 +57,6 @@
     TYPED_NAMEDTUPLE_NAMES,
     AnyType,
     CallableType,
-    Instance,
     LiteralType,
     TupleType,
     Type,
@@ -632,10 +631,9 @@ def add_method(
             args=[Argument(var, var.type, EllipsisExpr(), ARG_NAMED_OPT) for var in vars],
         )
         if self.options.python_version >= (3, 13):
-            type_vars = [tv for tv in info.defn.type_vars]
             add_method(
                 "__replace__",
-                ret=Instance(info, type_vars),
+                ret=None,
                 args=[Argument(var, var.type, EllipsisExpr(), ARG_NAMED_OPT) for var in vars],
             )
 
diff --git a/test-data/unit/check-namedtuple.test b/test-data/unit/check-namedtuple.test
index f10217b9aa5f..e9d156754d9c 100644
--- a/test-data/unit/check-namedtuple.test
+++ b/test-data/unit/check-namedtuple.test
@@ -1407,23 +1407,9 @@ from typing import NamedTuple
 class A(NamedTuple):
     x: int
 
-replaced = A(x=0).__replace__(x=1)
-reveal_type(replaced)  # N: Revealed type is "__main__.A"
-
+A(x=0).__replace__(x=1)
 A(x=0).__replace__(x="asdf")  # E: Argument "x" to "__replace__" of "A" has incompatible type "str"; expected "int"
 A(x=0).__replace__(y=1)  # E: Unexpected keyword argument "y" for "__replace__" of "A"
-
-from typing import TypeVar, Generic
-
-T = TypeVar("T")
-
-class GenericA(NamedTuple, Generic[T]):
-    x: T
-
-replaced_2 = GenericA(x=0).__replace__(x=1)
-reveal_type(replaced_2)  # N: Revealed type is "__main__.GenericA"
-GenericA(x=0).__replace__(x="abc") # E: Argument "x" to "__replace__" of "GenericA" has incompatible type "str"; expected "int"
-
 [builtins fixtures/tuple.pyi]
 [typing fixtures/typing-namedtuple.pyi]