import logging

from colorlog import ColoredFormatter

logging.addLevelName(5, 'TRACE')


def main():
    """Create and use a logger."""
    formatter = ColoredFormatter(log_colors={'TRACE': 'yellow'})

    handler = logging.StreamHandler()
    handler.setFormatter(formatter)

    logger = logging.getLogger('example')
    logger.addHandler(handler)
    logger.setLevel('TRACE')

    logger.log(5, 'a message using a custom level')


if __name__ == '__main__':
    main()