From aa15fafc33e2df394c28a56c57f82226057ac8ca Mon Sep 17 00:00:00 2001
From: Xuehai Pan <XuehaiPan@outlook.com>
Date: Sat, 18 Nov 2023 22:03:56 +0800
Subject: [PATCH] stdlib: `builtins.type.__base__` can be `None` (#11040)

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

diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index 665803bf3..e1cae8cfe 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -161,8 +161,9 @@ class classmethod(Generic[_T, _P, _R_co]):
         def __wrapped__(self) -> Callable[Concatenate[type[_T], _P], _R_co]: ...
 
 class type:
+    # object.__base__ is None. Otherwise, it would be a type.
     @property
-    def __base__(self) -> type: ...
+    def __base__(self) -> type | None: ...
     __bases__: tuple[type, ...]
     @property
     def __basicsize__(self) -> int: ...