From fa088948aa2b92d55754cd53cfed8e42d610d8ed Mon Sep 17 00:00:00 2001
From: Serious-senpai <57554044+Serious-senpai@users.noreply.github.com>
Date: Thu, 2 Nov 2023 22:59:29 +0700
Subject: [PATCH] Fix incorrect typehint for callbacks in multiprocessing.Pool
 (#10949)

---
 stdlib/multiprocessing/pool.pyi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stdlib/multiprocessing/pool.pyi b/stdlib/multiprocessing/pool.pyi
index dd4b865a3..c52f1c1f5 100644
--- a/stdlib/multiprocessing/pool.pyi
+++ b/stdlib/multiprocessing/pool.pyi
@@ -91,7 +91,7 @@ class Pool:
         func: Callable[[_S], _T],
         iterable: Iterable[_S],
         chunksize: int | None = None,
-        callback: Callable[[_T], object] | None = None,
+        callback: Callable[[list[_T]], object] | None = None,
         error_callback: Callable[[BaseException], object] | None = None,
     ) -> MapResult[_T]: ...
     def imap(self, func: Callable[[_S], _T], iterable: Iterable[_S], chunksize: int | None = 1) -> IMapIterator[_T]: ...
@@ -102,7 +102,7 @@ class Pool:
         func: Callable[..., _T],
         iterable: Iterable[Iterable[Any]],
         chunksize: int | None = None,
-        callback: Callable[[_T], object] | None = None,
+        callback: Callable[[list[_T]], object] | None = None,
         error_callback: Callable[[BaseException], object] | None = None,
     ) -> AsyncResult[list[_T]]: ...
     def close(self) -> None: ...