How to use the logzero.logger.addHandler function in logzero

def test_setup_logger_reconfiguration():
    """
    Should be able to reconfigure without loosing custom handlers
    """
    logzero.reset_default_logger()
    temp = tempfile.NamedTemporaryFile()
    temp2 = tempfile.NamedTemporaryFile()
    try:
        logzero.setup_default_logger(logfile=temp.name)

        # Add a custom file handler
        filehandler = logging.FileHandler(temp2.name)
        filehandler.setLevel(logging.DEBUG)
        filehandler.setFormatter(logzero.LogFormatter(color=False))
        logzero.logger.addHandler(filehandler)

        # First debug message goes to both files
        logzero.logger.debug("debug1")

        # Reconfigure logger to remove logfile
        logzero.setup_default_logger()
        logzero.logger.debug("debug2")

        # Reconfigure logger to add logfile
        logzero.setup_default_logger(logfile=temp.name)
        logzero.logger.debug("debug3")

        # Reconfigure logger to set minimum loglevel to INFO
        logzero.setup_default_logger(logfile=temp.name, level=logging.INFO)
        logzero.logger.debug("debug4")
        logzero.logger.info("info1")

def _logger():
        """Add the multiprocessing module's logger.

        :return: Returns a multiprocessing logger.
        """

        multiprocess_handler = get_logger()
        multiprocess_handler = logging.StreamHandler()
        multiprocess_handler.setLevel(logging.ERROR)
        multiprocess_handler.setFormatter(logzero.LogFormatter(color=True))

        # Attach it to the logzero default logger
        logzero.logger.addHandler(multiprocess_handler)
        logger = logzero.logger
        return logger