From 763179e73d365dd6aa05916dd70235b20ca3b1b9 Mon Sep 17 00:00:00 2001
From: peeyushtiwary27 <peeyushtiwary2717@gmail.com>
Date: Fri, 25 Sep 2026 01:28:31 +0530
Subject: [PATCH 1/2] fix typing issues for invalid-assignment

---
 computer_vision/mean_threshold.py | 2 +-
 other/dancing_links.py            | 6 ++++++
 sorts/benchmark_sorts.py          | 5 ++++-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/computer_vision/mean_threshold.py b/computer_vision/mean_threshold.py
index 47f9ebcb063b..b13d4445daf5 100644
--- a/computer_vision/mean_threshold.py
+++ b/computer_vision/mean_threshold.py
@@ -21,7 +21,7 @@ def mean_threshold(image: Image.Image) -> Image.Image:
 
     for j in range(width):
         for i in range(height):
-            pixels[i, j] = 255 if pixels[i, j] > mean else 0
+            image.putpixel((i, j), 255 if pixels[i, j] > mean else 0)
     return image
 
 
diff --git a/other/dancing_links.py b/other/dancing_links.py
index e611e891cc7f..57f98603af44 100644
--- a/other/dancing_links.py
+++ b/other/dancing_links.py
@@ -21,6 +21,12 @@
 class DLXNode:
     """Represents a node in the Dancing Links structure."""
 
+    left: "DLXNode"
+    right: "DLXNode"
+    up: "DLXNode"
+    down: "DLXNode"
+    column: "ColumnNode | None"
+
     def __init__(self) -> None:
         self.left = self.right = self.up = self.down = self
         self.column = None
diff --git a/sorts/benchmark_sorts.py b/sorts/benchmark_sorts.py
index 72b6b487e1a9..094374a9773b 100644
--- a/sorts/benchmark_sorts.py
+++ b/sorts/benchmark_sorts.py
@@ -25,6 +25,9 @@
 from timeit import timeit
 from typing import Protocol
 
+class SortFunction(Protocol):
+    def __call__[T](self, collection: list[T], /) -> Sequence[T]: ...
+
 from sorts.bubble_sort import bubble_sort_iterative
 from sorts.cocktail_shaker_sort import cocktail_shaker_sort
 from sorts.comb_sort import comb_sort
@@ -38,7 +41,7 @@
 from sorts.tim_sort import tim_sort
 
 # name -> callable.  Every callable accepts a list and returns the sorted list.
-SORTS: dict[str, Callable[[list[int]], Sequence[int]]] = {
+SORTS: dict[str, SortFunction] = {
     "bubble_sort": bubble_sort_iterative,
     "cocktail_shaker_sort": cocktail_shaker_sort,
     "comb_sort": comb_sort,

From 9555b9382bc55808be88978fa499dac2700ef848 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Thu, 24 Sep 2026 20:05:43 +0000
Subject: [PATCH 2/2] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 sorts/benchmark_sorts.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sorts/benchmark_sorts.py b/sorts/benchmark_sorts.py
index 094374a9773b..2cb3cbdfc1b6 100644
--- a/sorts/benchmark_sorts.py
+++ b/sorts/benchmark_sorts.py
@@ -25,9 +25,11 @@
 from timeit import timeit
 from typing import Protocol
 
+
 class SortFunction(Protocol):
     def __call__[T](self, collection: list[T], /) -> Sequence[T]: ...
 
+
 from sorts.bubble_sort import bubble_sort_iterative
 from sorts.cocktail_shaker_sort import cocktail_shaker_sort
 from sorts.comb_sort import comb_sort