From 8304c417144f8e53aa2f143e36ba39f212062570 Mon Sep 17 00:00:00 2001
From: Spencer Brown <spencerb21@live.com>
Date: Wed, 25 Oct 2023 15:03:44 +1000
Subject: [PATCH] [`pylint`] Add buffer methods to `bad-dunder-method-name`
 (`PLW3201`) exclusions (#8190)

## Summary

Python 3.12 added the `__buffer__()`/`__release_buffer_()` special
methods, which are incorrectly flagged as invalid dunder methods by
`PLW3201`.

## Test Plan

Added definitions to the test suite, and confirmed they failed without
the fix and are ignored after the fix was done.
---
 .../test/fixtures/pylint/bad_dunder_method_name.py         | 7 +++++++
 .../src/rules/pylint/rules/bad_dunder_method_name.rs       | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/crates/ruff_linter/resources/test/fixtures/pylint/bad_dunder_method_name.py b/crates/ruff_linter/resources/test/fixtures/pylint/bad_dunder_method_name.py
index 86c9081b475b4..2040086e5d930 100644
--- a/crates/ruff_linter/resources/test/fixtures/pylint/bad_dunder_method_name.py
+++ b/crates/ruff_linter/resources/test/fixtures/pylint/bad_dunder_method_name.py
@@ -49,6 +49,13 @@ def __private_method(self):
     def __doc__(self):
         return "Docstring"
 
+    # Added in Python 3.12
+    def __buffer__(self):  
+        return memoryview(b'')
+
+    def __release_buffer__(self, buf):
+        pass
+
     # Allow dunder methods recommended by attrs.
     def __attrs_post_init__(self):
         pass
diff --git a/crates/ruff_linter/src/rules/pylint/rules/bad_dunder_method_name.rs b/crates/ruff_linter/src/rules/pylint/rules/bad_dunder_method_name.rs
index 0ea5001d54053..b4a30f54aaa90 100644
--- a/crates/ruff_linter/src/rules/pylint/rules/bad_dunder_method_name.rs
+++ b/crates/ruff_linter/src/rules/pylint/rules/bad_dunder_method_name.rs
@@ -88,6 +88,7 @@ fn is_known_dunder_method(method: &str) -> bool {
             | "__attrs_pre_init__"
             | "__await__"
             | "__bool__"
+            | "__buffer__"
             | "__bytes__"
             | "__call__"
             | "__ceil__"
@@ -166,6 +167,7 @@ fn is_known_dunder_method(method: &str) -> bool {
             | "__rdivmod__"
             | "__reduce__"
             | "__reduce_ex__"
+            | "__release_buffer__"
             | "__repr__"
             | "__reversed__"
             | "__rfloordiv__"