From 6211d2f6c3ae52468d8f3fd3b21de13619d941a0 Mon Sep 17 00:00:00 2001
From: Dimitri Papadopoulos
 <3234522+DimitriPapadopoulos@users.noreply.github.com>
Date: Sat, 28 Jun 2025 09:50:58 +0200
Subject: [PATCH 1/2] Apply ruff/Pylint rule PLW3301

PLW3301 Nested `max` calls can be flattened

This should work with `tuple[int, ...]`.
---
 xarray/backends/chunks.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xarray/backends/chunks.py b/xarray/backends/chunks.py
index 80aac75ecef..64630455e8b 100644
--- a/xarray/backends/chunks.py
+++ b/xarray/backends/chunks.py
@@ -51,7 +51,7 @@ def align_nd_chunks(
 
         # The ideal size of the chunks is the maximum of the two; this would avoid
         # that we use more memory than expected
-        max_chunk = max(fixed_chunk, max(var_chunks))
+        max_chunk = max(fixed_chunk, *var_chunks)
 
         # The algorithm assumes that the chunks on this array are aligned except the last one
         # because it can be considered a partial one

From d8721c0459fe37b3fdd3bc14998e025adee2af22 Mon Sep 17 00:00:00 2001
From: Dimitri Papadopoulos
 <3234522+DimitriPapadopoulos@users.noreply.github.com>
Date: Sat, 28 Jun 2025 10:03:57 +0200
Subject: [PATCH 2/2] Enforce ruff/Pylint Warnings (PLW)

---
 pyproject.toml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pyproject.toml b/pyproject.toml
index c980c204b5f..36170540135 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -261,6 +261,7 @@ extend-select = [
   "W",    # pycodestyle warnings
   "PGH",  # pygrep-hooks
   "PLE",  # Pylint Errors
+  "PLW",  # Pylint Warnings
   "UP",   # pyupgrade
   "FURB", # refurb
   "RUF",
@@ -276,6 +277,10 @@ ignore = [
   "PERF203", # try-except within a loop incurs performance overhead
   "E402",    # module level import not at top of file
   "E731",    # do not assign a lambda expression, use a def
+  "PLW0603", # using the global statement to update is discouraged
+  "PLW0642", # reassigned `self` variable in instance method
+  "PLW1641", # object does not implement `__hash__` method
+  "PLW2901", # `for` loop variable overwritten by assignment target
   "UP007",   # use X | Y for type annotations
   "FURB105", # unnecessary empty string passed to `print`
   "RUF001",  # string contains ambiguous unicode character