Ignore first parameter of __new__.

Author: domdfcoding

flake8_params/__init__.py

@@ -202,6 +202,10 @@ def _visit_function(self, node: Union[ast.FunctionDef, ast.AsyncFunctionDef]) ->
 		signature_args = list(get_signature_args(node))
 		decorators = list(get_decorator_names(node))
 
+		if node.name == "__new__":
+			# Remove 'cls' etc.
+			signature_args.pop(0)
+
 		error = check_params(signature_args, docstring_args, decorators)
 		if not error:
 			self.generic_visit(node)

tests/example_code.py

@@ -345,3 +345,19 @@ def positional_only(foo, /, bar, baz):
 	:param bar:
 	:param baz:
 	"""
+
+
+# stdlib
+from typing import Tuple
+
+
+class MyTuple(Tuple[int, str, int]):  # noqa: SLOT001
+
+	def __new__(cls, a: int, b: str, c: int = 0) -> "MyTuple":
+		"""
+		Create a new :class:`~.MyTuple`.
+
+		:rtype: :class:`~.MyTuple`.
+		"""
+
+		return super().__new__((a, b, c))  # type: ignore[arg-type]

tests/test_flake8_params_/test_plugin.txt

@@ -17,3 +17,4 @@
 278:1: PRM003 Extra parameters in docstring: bar
 292:0: PRM002 Missing parameters in docstring: *baz
 311:0: PRM002 Missing parameters in docstring: **baz
+356:1: PRM002 Missing parameters in docstring: a b c