我刚才记录的最差级别日志是什么?

由于您只使用根记录器,因此可以在其上附加一个过滤器,以跟踪级别:

import argparse
import logging
import random

LEVELS = ['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL']

class LevelTrackingFilter(logging.Filter):
    def __init__(self):
        self.level = logging.NOTSET

    def filter(self, record):
        self.level = max(self.level, record.levelno)
        return True

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('maxlevel', metavar='MAXLEVEL', default='WARNING',
                        choices=LEVELS,
                        nargs='?', help='Set maximum level to log')
    options = parser.parse_args()
    maxlevel = getattr(logging, options.maxlevel)

    logger = logging.getLogger()
    logger.addHandler(logging.NullHandler())  # needs Python 2.7
    filt = LevelTrackingFilter()
    logger.addFilter(filt)

    for i in range(100):
        level = getattr(logging, random.choice(LEVELS))
        if level > maxlevel:
            continue
        logger.log(level, 'message')
    if filt.level <= logging.INFO:
        print('SUCCESS!')
    elif filt.level == logging.WARNING:
        print('SUCCESS, with warnings. Please check the logs.')
    else:
        print('FAILURE')

if __name__ == '__main__':
    main()

global worst_log_lvl = logging.NOTSET

def write_log(logger, lvl, msg):
    logger.log(lvl, msg)
    if lvl > worst_log_lvl:
        global worst_log_lvl
        worst_log_lvl = lvl

或制造 worst_log_lvl 自定义类的成员,在其中模拟 logging.logger ,而不是实际的记录器

 class CustomLoggerWrapper(object):
     def __init__(self):
         # setup of your custom logger
         self.worst_log_lvl = logging.NOTSET

     def debug(self):
         pass

     # repeat for other functions like info() etc.