import logging


class SimpleLogger(logging.getLoggerClass()):
    def __init__(self, name='SimpleLogger', level=logging.NOTSET):
        super().__init__(name, level)
        _handler = logging.StreamHandler()
        _handler.setLevel(level)
        self.addHandler(_handler)


if __name__ == '__main__':
    logger = SimpleLogger()
    logger.setLevel('DEBUG')
    logger.debug('testing debug')
    logger.info('testing info')
    logger.warning('%s', 'testing warning')
    logger.error('testing error')
    logger.debug('-----------')

    logger.setLevel('INFO')
    logger._cache.clear()
    logger.debug('testing debug')
    logger.info('testing info')
    logger.warning('%s', 'testing warning')
    logger.error('testing error')