diff --git a/paddlers/datasets/__init__.py b/paddlers/datasets/__init__.py
index 8c52017..1a54752 100644
--- a/paddlers/datasets/__init__.py
+++ b/paddlers/datasets/__init__.py
@@ -1,3 +1,17 @@
+# 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 .voc import VOCDetection
 from .seg_dataset import SegDataset
 from .cd_dataset import CDDataset
diff --git a/paddlers/datasets/cd_dataset.py b/paddlers/datasets/cd_dataset.py
index f5f95fd..56d1333 100644
--- a/paddlers/datasets/cd_dataset.py
+++ b/paddlers/datasets/cd_dataset.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# 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.
diff --git a/paddlers/datasets/seg_dataset.py b/paddlers/datasets/seg_dataset.py
index 61f0b46..ae4fcd5 100644
--- a/paddlers/datasets/seg_dataset.py
+++ b/paddlers/datasets/seg_dataset.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# 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.
diff --git a/paddlers/models/ppcd/__init__.py b/paddlers/models/ppcd/__init__.py
index 36fa846..08da15f 100644
--- a/paddlers/models/ppcd/__init__.py
+++ b/paddlers/models/ppcd/__init__.py
@@ -1 +1,15 @@
+# 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 .cdnet import CDNet
\ No newline at end of file
diff --git a/paddlers/models/ppcd/cdnet.py b/paddlers/models/ppcd/cdnet.py
index 96394cb..faf011d 100644
--- a/paddlers/models/ppcd/cdnet.py
+++ b/paddlers/models/ppcd/cdnet.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# 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.
diff --git a/paddlers/models/ppcls/__init__.py b/paddlers/models/ppcls/__init__.py
index e69de29..a1c525b 100644
--- a/paddlers/models/ppcls/__init__.py
+++ b/paddlers/models/ppcls/__init__.py
@@ -0,0 +1,13 @@
+# 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.
\ No newline at end of file
diff --git a/paddlers/tasks/__init__.py b/paddlers/tasks/__init__.py
index e66ba0d..1543dac 100644
--- a/paddlers/tasks/__init__.py
+++ b/paddlers/tasks/__init__.py
@@ -1,4 +1,17 @@
+# 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 det
 from .segmenter import *
 from .load_model import load_model
-
diff --git a/paddlers/tasks/changedetector.py b/paddlers/tasks/changedetector.py
index 6879443..557b0c9 100644
--- a/paddlers/tasks/changedetector.py
+++ b/paddlers/tasks/changedetector.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# 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.
diff --git a/paddlers/tasks/det/__init__.py b/paddlers/tasks/det/__init__.py
index 81d326a..de36709 100644
--- a/paddlers/tasks/det/__init__.py
+++ b/paddlers/tasks/det/__init__.py
@@ -1 +1,15 @@
+# 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 .detector import *
diff --git a/paddlers/tasks/segmenter.py b/paddlers/tasks/segmenter.py
index 77507c7..129558f 100644
--- a/paddlers/tasks/segmenter.py
+++ b/paddlers/tasks/segmenter.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# 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.
diff --git a/paddlers/transforms/__init__.py b/paddlers/transforms/__init__.py
index fd278ca..36d285d 100644
--- a/paddlers/transforms/__init__.py
+++ b/paddlers/transforms/__init__.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from operator import mod
 from .operators import *
 from .batch_operators import BatchRandomResize, BatchRandomResizeByShort, _BatchPadding
 from paddlers import transforms as T