Cyber: Add record_channel_info_py3 example.

cyber/python/examples/record_channel_info.py

@@ -50,8 +50,8 @@ def print_channel_info(file_path):
         print(
             'Channel: %s, count: %d, desc size: %d' %
             (channel, count, len(desc)))
-        # print desc
-    print "++++++++++++Finish Channel Info Statistics++++++++++++++\n"
+        # print(desc)
+    print("++++++++++++Finish Channel Info Statistics++++++++++++++\n")
 
 if __name__ == '__main__':
     if len(sys.argv) < 2:

cyber/python/examples/record_channel_info_py3.py

+#!/usr/bin/env python3
+
+# ****************************************************************************
+# Copyright 2019 The Apollo 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.
+# ****************************************************************************
+# -*- coding: utf-8 -*-
+"""Module for example of record."""
+
+import sys
+
+from cyber_py import cyber_py3 as cyber
+from cyber_py import record_py3 as record
+from cyber.proto import record_pb2
+
+
+def print_channel_info(file_path):
+    freader = record.RecordReader(file_path)
+    channels = freader.get_channellist()
+
+    header_msg = freader.get_headerstring()
+    header = record_pb2.Header()
+    header.ParseFromString(header_msg)
+
+    print('\n++++++++++++Begin Channel Info Statistics++++++++++++++')
+    print('-' * 40)
+    print(
+        'record version: [%d:%d]' %
+        (header.major_version, header.minor_version))
+    print('record message_number: %s' % str(header.message_number))
+    print('record file size(Byte): %s' % str(header.size))
+    print('chunk_number: %d' % header.chunk_number)
+    print('channel count: %d' % len(channels))
+    print('-' * 40)
+    count = 0
+    for channel in channels:
+        desc = freader.get_protodesc(channel)
+        count += 1
+        print(
+            'Channel: %s, count: %d, desc size: %d' %
+            (channel, count, len(desc)))
+        # print(desc)
+    print("++++++++++++Finish Channel Info Statistics++++++++++++++\n")
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print('Usage: %s record_file' % sys.argv[0])
+        sys.exit(0)
+
+    cyber.init()
+    print_channel_info(sys.argv[1])
+    cyber.shutdown()