code: def setup_logging(logfile_path):
      
      date_fmt = "%y-%m-%d (%a) %H:%M:%S"
  
      std_formatter = logging.Formatter('%(asctime)s:%(levelname)s:%(message)s',
                                        date_fmt)
  
      # Get to the following size before splitting log into multiple files:
      log_chunk_bytesize = 5e6
  
      info_logfile = logging.handlers.RotatingFileHandler(logfile_path,
                                                          maxBytes=log_chunk_bytesize,
                                                          backupCount=10)
      info_logfile.setFormatter(std_formatter)
      info_logfile.setLevel(logging.DEBUG)
  
      stdout_log = logging.StreamHandler()
      stdout_log.setLevel(logging.DEBUG)
      stdout_log.setFormatter(std_formatter)
  
      # Set up root logger
      logger = logging.getLogger()
      logger.handlers = []
      logger.setLevel(logging.DEBUG)
      logger.addHandler(info_logfile)
      logger.addHandler(stdout_log)
      logging.getLogger('iso8601').setLevel(
          logging.ERROR)  # Suppress iso8601 debug log.
      return logger
docs: Set up basic (INFO level) and debug logfiles