code: def default_logging_dict(log_dir, handlers=['file'], filename='debug.log'):
      
      d = {
          'version': 1,
          'disable_existing_loggers': True,
          'formatters': {
              'escaped': {
                  'format':LOG_FORMAT_ESCAPED,
              },
              'standard': {
                  'format':LOG_FORMAT_STANDARD,
              },
          },
          'handlers': {
              'default': {
                  'level':'DEBUG',
                  'class':'logging.StreamHandler',
                  'formatter':'escaped',
              },
              'file': {
                  'level':'DEBUG',
                  'class':'wrench.logtools.srothandler.SizeRotatingFileHandler',
                  'filename': os.path.abspath(os.path.join(log_dir, filename)),
                  'formatter':'standard',
                  'maxBytes':300000,
              },
          },
          'loggers': {
              '': {
                  'handlers':handlers,
                  'propagate': False,
                  'level':'DEBUG',
              },
          },
      }
  
      return d
docs: Returns a logging configuration dictionary with reasonable defaults.
      Defines two handlers: "default" and "file", that go to STDOUT and a
      :class:`SizeRotatingFileHandler`.
  
      :param log_dir:
          Directory for logs to go into.
      :param handlers:
          Which logging handlers to use.  Defaults to only 'file'
      :param filename:
          Base name of the file to log to.  Defaults to "debug.log".