text: #!/usr/bin/env python3
  
  ###############################################################################
  # Copyright 2018 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.
  ###############################################################################
  
  import os
  import logging
  import logging.handlers
  
  
  def init_log(
          log_path,
          level=logging.INFO,
          when="D",
          backup=7,
          format="%(levelname)s: %(asctime)s: %(filename)s:%(lineno)d * %(thread)d %(message)s",
          datefmt="%m-%d %H:%M:%S"):
      formatter = logging.Formatter(format, datefmt)
      logger = logging.getLogger()
      logger.setLevel(level)
  
      dir = os.path.dirname(log_path)
      if not os.path.isdir(dir):
          os.makedirs(dir)
  
      handler = logging.handlers.TimedRotatingFileHandler(
          log_path + ".log", when=when, backupCount=backup)
      handler.setLevel(level)
      handler.setFormatter(formatter)
      logger.addHandler(handler)
  
      handler = logging.handlers.TimedRotatingFileHandler(
          log_path + ".log.wf", when=when, backupCount=backup)
      handler.setLevel(logging.WARNING)
      handler.setFormatter(formatter)
      logger.addHandler(handler)
  