clean bc warning

parser/func_to_graph/func2graph.py

@@ -1,19 +1,9 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
-#
-# 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
-#
-# less 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.
-# ============================================================================
-#!/usr/bin/env python
-# -*- coding:utf-8 -*-
+#!/usr/bin/python3.7
+# -*- coding: UTF-8 -*-
+#-------------------------------------------------------------------
+# Purpose:
+# Copyright 2020 Huawei Technologies Co., Ltd. All rights reserved.
+#-------------------------------------------------------------------
 
 import os
 import sys