add more detail for code source. (#1947)

Author: ZHUI

paddlenlp/trainer/argparser.py

@@ -13,6 +13,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Notice, most of this file is modified from 
+#  https://github.com/huggingface/transformers/blob/main/src/transformers/hf_argparser.py
+# Thanks a lot.
+
 import dataclasses
 import json
 import sys

paddlenlp/trainer/trainer_args.py

@@ -13,6 +13,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Notice, most of this file is modified from 
+#  https://github.com/huggingface/transformers/blob/main/src/transformers/training_args.py
+# Thanks a lot.
+
 import contextlib
 import json
 import math

paddlenlp/trainer/trainer_base.py

@@ -13,6 +13,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Notice, most of this file is modified from 
+#  https://github.com/huggingface/transformers/blob/main/src/transformers/trainer.py
+# Thanks a lot.
+
 import collections
 import contextlib
 import inspect

paddlenlp/trainer/trainer_callback.py

@@ -12,6 +12,10 @@
 # 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.
+
+# Notice, most of this file is modified from 
+#  https://github.com/huggingface/transformers/blob/main/src/transformers/trainer_callback.py
+# Thanks a lot.
 """
 Callbacks to use with the Trainer class and customize the training loop.
 """

paddlenlp/trainer/trainer_utils.py

@@ -12,6 +12,10 @@
 # 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.
+
+# Notice, most of this file is modified from 
+#  https://github.com/huggingface/transformers/blob/main/src/transformers/trainer_utils.py
+# Thanks a lot.
 """
 Utilities for the Trainer class. 
 """

paddlenlp/trainer/utils/helper.py

@@ -1,3 +1,22 @@
+# Copyright 2020-present the HuggingFace Inc. team.
+# 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.
+
+# Notice, most of this file is modified from 
+#  https://github.com/huggingface/transformers/blob/main/src/transformers
+# Thanks a lot.
+
 import paddle
 import paddle.distributed as dist
 from typing import Any, Callable, Dict, List, Optional, Tuple, Union