custom logging level

import logging
DEBUG_LEVELV_NUM = 31
logging.addLevelName(DEBUG_LEVELV_NUM, "[DEBUGV]")
logging.basicConfig(level=logging.INFO)

logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)


def main():
    logger.log(DEBUG_LEVELV_NUM, '---123---')
    logger.info('123')

if __name__ == '__main__':
    main()