add license

Former-commit-id: 69cfc98d7c81756a5ab6bf962240e393e449fef0

src/llamafactory/train/trainer_utils.py

@@ -1,3 +1,22 @@
+# Copyright 2024 HuggingFace Inc. and the LlamaFactory team.
+#
+# This code is inspired by the GaLore's implementation: https://github.com/jiaweizzhao/GaLore
+# and the LoRA+'s implementation: https://github.com/nikhil-ghosh-berkeley/loraplus
+# and the BAdam's implementation: https://github.com/Ledzy/BAdam
+# and the TRL's implementation: https://github.com/huggingface/trl
+#
+# 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 typing import TYPE_CHECKING, Callable, Dict, List, Optional, Tuple, Union
 
 import torch