chore: import upstream snapshot with attribution

python/paddle/sparse/nn/__init__.py

@@ -0,0 +1,33 @@
+#   Copyright (c) 2022 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 . import functional  # noqa: F401
+from .layer.activation import LeakyReLU, ReLU, ReLU6, Softmax
+from .layer.conv import Conv2D, Conv3D, SubmConv2D, SubmConv3D
+from .layer.norm import BatchNorm, SyncBatchNorm
+from .layer.pooling import MaxPool3D
+
+__all__ = [
+    'ReLU',
+    'ReLU6',
+    'LeakyReLU',
+    'Softmax',
+    'BatchNorm',
+    'SyncBatchNorm',
+    'Conv2D',
+    'Conv3D',
+    'SubmConv2D',
+    'SubmConv3D',
+    'MaxPool3D',
+]