chore: import upstream snapshot with attribution

python/paddle/nn/modules/utils.py

@@ -0,0 +1,34 @@
+#   Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import annotations
+
+import collections
+from itertools import repeat
+
+
+def _ntuple(n, name="parse"):
+    def parse(x):
+        if isinstance(x, collections.abc.Iterable):
+            return tuple(x)
+        return tuple(repeat(x, n))
+
+    parse.__name__ = name
+    return parse
+
+
+_single = _ntuple(1, "_single")
+_pair = _ntuple(2, "_pair")
+_triple = _ntuple(3, "_triple")
+_quadruple = _ntuple(4, "_quadruple")