python logging日志如何 改变级别

Question

开始时设置成了logging.DEBUG,后来改为了logging.INFO,感觉还是在以DEBUG的等级打印日志

import logging
logging.basicConfig(level=logging.DEBUG)
logging.debug('1.This is debug message')
logging.info('2.This is info message')
logging.warning('3.This is warning message')
logging.basicConfig(level=logging.INFO)
logging.debug('4.This is debug message')
logging.info('5.This is info message')
logging.warning('6.This is warning message')

log如下:

DEBUG:root:1.This is debug message
INFO:root:2.This is info message
WARNING:root:3.This is warning message
DEBUG:root:4.This is debug message
INFO:root:5.This is info message
WARNING:root:6.This is warning message

Answer 1

第二次basicConfig调用不产生任何影响。

官方文档： https://docs.python.org/2/library/logging.html#logging.basicConfig

This function does nothing if the root logger already has handlers configured for it.