add license

Former-commit-id: 69cfc98d7c81756a5ab6bf962240e393e449fef0

src/llamafactory/train/sft/metric.py

@@ -1,3 +1,21 @@
+# Copyright 2024 HuggingFace Inc., THUDM, and the LlamaFactory team.
+#
+# This code is inspired by HuggingFace's transformers library and THUDM's ChatGLM implementation.
+# https://github.com/huggingface/transformers/blob/v4.40.0/examples/pytorch/summarization/run_summarization.py
+# https://github.com/THUDM/ChatGLM-6B/blob/main/ptuning/main.py
+#
+# 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 dataclasses import dataclass
 from typing import TYPE_CHECKING, Dict, Sequence, Tuple, Union