Update comments (#4569)

### What problem does this PR solve?

Add license statement.

### Type of change

- [x] Refactoring

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

sdk/python/test/test_frontend_api/common.py

@@ -1,3 +1,19 @@
+#
+#  Copyright 2025 The InfiniFlow 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.
+#
+
 import os
 import requests
 

sdk/python/test/test_frontend_api/get_email.py

@@ -1,3 +1,19 @@
+#
+#  Copyright 2025 The InfiniFlow 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.
+#
+
 def test_get_email(get_email):
     print("\nEmail account:",flush=True)
     print(f"{get_email}\n",flush=True)

sdk/python/test/test_frontend_api/test_dataset.py

@@ -1,3 +1,19 @@
+#
+#  Copyright 2025 The InfiniFlow 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 common import create_dataset, list_dataset, rm_dataset, update_dataset, DATASET_NAME_LIMIT
 import re
 import random
@@ -121,7 +137,8 @@ def test_update_different_params_dataset_success(get_auth):
     print(f"found {len(dataset_list)} datasets")
     dataset_id = dataset_list[0]
 
-    json_req = {"kb_id": dataset_id, "name": "test_update_dataset", "description": "test", "permission": "me", "parser_id": "presentation",
+    json_req = {"kb_id": dataset_id, "name": "test_update_dataset", "description": "test", "permission": "me",
+                "parser_id": "presentation",
                 "language": "spanish"}
     res = update_dataset(get_auth, json_req)
     assert res.get("code") == 0, f"{res.get('message')}"
@@ -164,4 +181,3 @@ def test_update_different_params_dataset_fail(get_auth):
         res = rm_dataset(get_auth, dataset_id)
         assert res.get("code") == 0, f"{res.get('message')}"
     print(f"{len(dataset_list)} datasets are deleted")
-