From 59bb6ff07176e5ac863575b3da9759146104c738 Mon Sep 17 00:00:00 2001
From: Huanyi Xie <74809554+xiehuanyi@users.noreply.github.com>
Date: Tue, 13 Oct 2026 21:07:02 +0300
Subject: [PATCH] Make weak reference callbacks optional and read-only

---
 stdlib/weakref.pyi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/stdlib/weakref.pyi b/stdlib/weakref.pyi
index e81052de7d26..1364a6177d1d 100644
--- a/stdlib/weakref.pyi
+++ b/stdlib/weakref.pyi
@@ -54,7 +54,8 @@ class ProxyType(Generic[_T]):  # "weakproxy"
 
 @disjoint_base
 class ReferenceType(Generic[_T]):  # "weakref"
-    __callback__: Callable[[Self], Any]
+    @property
+    def __callback__(self) -> Callable[[Self], Any] | None: ...
     def __new__(cls, o: _T, callback: Callable[[Self], Any] | None = ..., /) -> Self: ...
     def __call__(self) -> _T | None: ...
     def __eq__(self, value: object, /) -> bool: ...