Merge pull request #3 from yanxinyi620/master

Delete .gitignore and Update independence_tests

gcastle/castle/common/independence_tests.py

@@ -1,4 +1,17 @@
-# -*-coding: utf-8 -*-
+# coding=utf-8
+# Copyright (C) 2021. Huawei Technologies Co., Ltd. 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 math
 import numpy as np