add convert_weights.py

ppcls/utils/convert_weights.py

+# 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 __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+import paddle
+
+
+def convert_distill_weights(distill_weights_path, student_weights_path):
+    assert os.path.exists(distill_weights_path), \
+        "Given distill_weights_path {} not exist.".format(distill_weights_path)
+    # Load teacher and student weights 
+    all_params = paddle.load(distill_weights_path)
+    # Extract student weights
+    s_params = {key[len("Student."):]: all_params[key] for key in all_params if "Student." in key}
+    # Save student weights
+    paddle.save(s_params, student_weights_path)