code: def _set_log_format(color, include_caller):
      
      level_name = '* %(levelname)1s'
      time = '%(asctime)s,%(msecs)03d'
      message = '%(message)s'
      color_start = '%(color)s'
      color_end = '%(end_color)s'
      caller = '[%(module)s:%(lineno)d]'
  
      if color:
          if include_caller:
              return '{}{}{}  {}  {} {}'.format(color_start, level_name, color_end, time, message, caller)
          else:
              return '{}{}{}  {}  {}'.format(color_start, level_name, color_end, time, message)
      else:
          if include_caller:
              return '{}  {}  {} {}'.format(level_name, time, message, caller)
          else:
              return '{}  {}  {}'.format(level_name, time, message)
docs: Set log format
      :param color: Log message is colored
      :param include_caller: At the end, put a [caller:line-of-code], e.g. [script:123]
      :return: string of log format