python日志开启

import logging
# 设置默认的level为DEBUG
# 设置log的格式
logging.basicConfig(
    level=logging.DEBUG,
    format="[%(asctime)s] %(name)s:%(levelname)s: %(message)s"
)
# 记录log
logging.debug(...)
logging.info(...)
logging.warn(...)
logging.error(...)
logging.critical(...)


上面的代码中,如果将level=logging.DEBUG这一行的日志打印级别调高,则源码中只有满足对应级别的调试信息才会打印出来。如下所示test.py:

import logging

logging.basicConfig(
        level = logging.DEBUG,
        format = "[%(asctime)s] %(name)s:%(levelname)s: %(message)s"
)

if __name__ == '__main__':
        logging.debug('hello word - debug')
        logging.info('hello word - info')
        logging.warn('hello word - warn')
        logging.error('hello word - error')
        logging.critical('hello word - critical')


运行结果如下:



倘若将logging级别更改为INFO,则只会打印INFO以上级别的信息

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