def METHOD_NAME(logger_name, handler, log_level):
    logger = logging.getLogger(logger_name)
    # set all handlers to ERROR
    for handler in logger.handlers:
        handler.setLevel(logging.ERROR)
    # set children oasislmf loggers to 'log_level'
    if 'oasislmf.' in logger_name:
        logger.addHandler(handler)
        logger.setLevel(log_level)
        logger.propagate = False
    else:
        logger.setLevel(logging.ERROR)