From 244b09048f53d8438552c51007ecd304eb641f3f Mon Sep 17 00:00:00 2001
From: Dimitri Papadopoulos
 <3234522+DimitriPapadopoulos@users.noreply.github.com>
Date: Tue, 18 Mar 2025 19:21:16 +0100
Subject: [PATCH 1/3] MNT Update mypy

---
 .pre-commit-config.yaml      | 2 +-
 pyproject.toml               | 2 +-
 sklearn/_min_dependencies.py | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e8730b679a5d6..cecc0e705cd73 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -16,7 +16,7 @@ repos:
     hooks:
     -   id: black
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.9.0
+    rev: v1.15.0
     hooks:
      -  id: mypy
         files: sklearn/
diff --git a/pyproject.toml b/pyproject.toml
index a96c517cf840e..3be6887e3d391 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ tests = [
     "pytest-cov>=2.9.0",
     "ruff>=0.5.1",
     "black>=24.3.0",
-    "mypy>=1.9",
+    "mypy>=1.15",
     "pyamg>=5.0.0",
     "polars>=0.20.30",
     "pyarrow>=12.0.0",
diff --git a/sklearn/_min_dependencies.py b/sklearn/_min_dependencies.py
index 8e0592abddd74..4b64fc9b11b71 100644
--- a/sklearn/_min_dependencies.py
+++ b/sklearn/_min_dependencies.py
@@ -34,7 +34,7 @@
     "pytest-cov": ("2.9.0", "tests"),
     "ruff": ("0.5.1", "tests"),
     "black": ("24.3.0", "tests"),
-    "mypy": ("1.9", "tests"),
+    "mypy": ("1.15", "tests"),
     "pyamg": ("5.0.0", "tests"),
     "polars": ("0.20.30", "docs, tests"),
     "pyarrow": ("12.0.0", "tests"),

From b4e15bfa2a2f68c373289e1938a0badef883baf9 Mon Sep 17 00:00:00 2001
From: Dimitri Papadopoulos
 <3234522+DimitriPapadopoulos@users.noreply.github.com>
Date: Tue, 18 Mar 2025 21:29:36 +0100
Subject: [PATCH 2/3] MNT Fix mypy error

error: Unsupported operand types for + [operator]
---
 sklearn/_loss/tests/test_loss.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sklearn/_loss/tests/test_loss.py b/sklearn/_loss/tests/test_loss.py
index ae94f4c1192b4..69ff18d376fee 100644
--- a/sklearn/_loss/tests/test_loss.py
+++ b/sklearn/_loss/tests/test_loss.py
@@ -204,7 +204,7 @@ def test_loss_boundary(loss):
 
 
 @pytest.mark.parametrize(
-    "loss, y_true_success, y_true_fail", Y_COMMON_PARAMS + Y_TRUE_PARAMS
+    "loss, y_true_success, y_true_fail", Y_COMMON_PARAMS + Y_TRUE_PARAMS  # type: ignore[operator]
 )
 def test_loss_boundary_y_true(loss, y_true_success, y_true_fail):
     """Test boundaries of y_true for loss functions."""
@@ -215,7 +215,7 @@ def test_loss_boundary_y_true(loss, y_true_success, y_true_fail):
 
 
 @pytest.mark.parametrize(
-    "loss, y_pred_success, y_pred_fail", Y_COMMON_PARAMS + Y_PRED_PARAMS  # type: ignore
+    "loss, y_pred_success, y_pred_fail", Y_COMMON_PARAMS + Y_PRED_PARAMS  # type: ignore[operator]
 )
 def test_loss_boundary_y_pred(loss, y_pred_success, y_pred_fail):
     """Test boundaries of y_pred for loss functions."""

From 5c69facdf1aedef6416173f57c35868ea9b7f32c Mon Sep 17 00:00:00 2001
From: Dimitri Papadopoulos
 <3234522+DimitriPapadopoulos@users.noreply.github.com>
Date: Tue, 18 Mar 2025 21:31:04 +0100
Subject: [PATCH 3/3] MNT Fix mypy note

note: By default the bodies of untyped functions are not checked,
      consider using --check-untyped-defs  [annotation-unchecked]
---
 sklearn/tree/_classes.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sklearn/tree/_classes.py b/sklearn/tree/_classes.py
index 53a1187ec5a50..ec042326d5ea9 100644
--- a/sklearn/tree/_classes.py
+++ b/sklearn/tree/_classes.py
@@ -1993,5 +1993,5 @@ def __sklearn_tags__(self):
             "friedman_mse",
             "poisson",
         }
-        tags.input_tags.allow_nan: allow_nan
+        tags.input_tags.allow_nan = allow_nan
         return tags