<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def reset_default_logger():
 """ Resets the internal default logger to the initial configuration """

    global logger
    global _loglevel
    global _logfile
    global _formatter
    _loglevel = logging.DEBUG
    _logfile = None
    _formatter = None
    logger = setup_logger(name=LOGZERO_DEFAULT_LOGGER, logfile=_logfile, level=_loglevel, formatter=_formatter)