這是一個錯誤嗎？setLevel 似乎設置了適當的級別，但 logging.info 沒有效果：>>> import logging>>> logger=logging.getLogger()>>> logger.warning('foo')foo>>> logger.info('foo')>>> logger.getEffectiveLevel()20  # this is logging.INFO.  Why didn't .info() work?>>> logger.setLevel(logging.INFO)>>> logger.getEffectiveLevel()20>>> logger.setLevel(logging.DEBUG)>>> logger.info('foo')>>> logger.getEffectiveLevel()10