Ignore unnecessary dunder calls within dunder definitions (#9496)

Closes https://github.com/astral-sh/ruff/issues/9486.

crates/ruff_linter/resources/test/fixtures/pylint/unnecessary_dunder_call.py

@@ -24,6 +24,12 @@ class Thing:
         super().__init__()  # OK
         super().__class__(stuff=(1, 2, 3))  # OK
 
+    def __getattribute__(self, item):
+        return object.__getattribute__(self, item)  # OK
+
+    def do_thing(self, item):
+        return object.__getattribute__(self, item)  # PLC2801
+
 
 blah = lambda: {"a": 1}.__delitem__("a")  # OK
 

crates/ruff_linter/src/rules/pylint/rules/unnecessary_dunder_call.rs

@@ -1,6 +1,6 @@
 use ruff_diagnostics::{Diagnostic, Edit, Fix, FixAvailability, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::{self as ast, Expr};
+use ruff_python_ast::{self as ast, Expr, Stmt};
 use ruff_python_semantic::SemanticModel;
 use ruff_text_size::Ranged;
 
@@ -80,11 +80,17 @@ pub(crate) fn unnecessary_dunder_call(checker: &mut Checker, call: &ast::ExprCal
         return;
     }
 
-    // Ignore certain dunder methods used in lambda expressions.
+    // Ignore certain dunder method calls in lambda expressions. These methods would require
+    // rewriting as a statement, which is not possible in a lambda expression.
     if allow_nested_expression(attr, checker.semantic()) {
         return;
     }
 
+    // Ignore dunder method calls within dunder methods definitions.
+    if in_dunder_method_definition(checker.semantic()) {
+        return;
+    }
+
     // Ignore dunder methods used on `super`.
     if let Expr::Call(ast::ExprCall { func, .. }) = value.as_ref() {
         if checker.semantic().is_builtin("super") {
@@ -344,3 +350,13 @@ fn allow_nested_expression(dunder_name: &str, semantic: &SemanticModel) -> bool
                 | "__ior__"
         )
 }
+
+/// Returns `true` if the [`SemanticModel`] is currently in a dunder method definition.
+fn in_dunder_method_definition(semantic: &SemanticModel) -> bool {
+    semantic.current_statements().any(|statement| {
+        let Stmt::FunctionDef(func_def) = statement else {
+            return false;
+        };
+        func_def.name.starts_with("__") && func_def.name.ends_with("__")
+    })
+}

crates/ruff_linter/src/rules/pylint/snapshots/ruff_linter__rules__pylint__tests__PLC2801_unnecessary_dunder_call.py.snap

@@ -321,4 +321,12 @@ unnecessary_dunder_call.py:19:7: PLC2801 Unnecessary dunder call to `__neg__`. M
    |
    = help: Multiply by -1 instead
 
+unnecessary_dunder_call.py:31:16: PLC2801 Unnecessary dunder call to `__getattribute__`. Access attribute directly or use getattr built-in function.
+   |
+30 |     def do_thing(self, item):
+31 |         return object.__getattribute__(self, item)  # PLC2801
+   |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ PLC2801
+   |
+   = help: Access attribute directly or use getattr built-in function
+