Add tuple unpacking detection and update tests

Author: vrslev

src/community_of_python_flake8_plugin/checks/temp_var.py

@@ -18,15 +18,25 @@ def extract_names(expression: ast.expr) -> typing.Iterable[str]:
             for elt in expression.elts:
                 yield from extract_names(elt)
 
+    def is_tuple_unpacking(assign_node: ast.Assign) -> bool:
+        """Check if this is a tuple unpacking assignment."""
+        if not assign_node.targets:
+            return False
+
+        target = assign_node.targets[0]
+        return isinstance(target, ast.Tuple)
+
     @typing.final
     class UsageCollector(ast.NodeVisitor):
         def visit_Name(self, name_node: ast.Name) -> None:
             variable_usage[name_node.id].append(name_node)
             self.generic_visit(name_node)
 
         def visit_Assign(self, assign_node: ast.Assign) -> None:
-            for target in assign_node.targets:
-                assigned_variable_names.update(extract_names(target))
+            # Skip collecting variables from tuple unpacking assignments
+            if not is_tuple_unpacking(assign_node):
+                for target in assign_node.targets:
+                    assigned_variable_names.update(extract_names(target))
             self.generic_visit(assign_node)
 
         def visit_AugAssign(self, aug_assign_node: ast.AugAssign) -> None:

tests/test_plugin.py

@@ -282,6 +282,8 @@ def test_naming_validations(input_source: str, expected_output: list[str]) -> No
         ),
         # No violation: Variable used in loop
         ("def fetch_item():\n    for _, one_value in values: print(f'{one_value}')", []),
+        # No violation: Tuple unpacking with underscore variables
+        ("def parse_module():\n    parent, _, _child = module_name.rpartition('.')\n    return parent", []),
     ],
 )
 def test_variable_usage_validations(input_source: str, expected_output: list[str]) -> None: