python logging 日志模块的配置和使用

import logging
logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',
                    datefmt='%a, %d %b %Y %H:%M:%S',
                    filename='/tmp/test.log',
                    filemode='w')

logging.debug('debug message')
logging.info('info message')
logging.warning('warning message')
logging.error('error message')
logging.critical('critical message')

 
import logging

# 设置root logger
r = logging.getLogger()
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
ch.setFormatter(formatter)
r.addHandler(ch)

# 创建一个logger作为父亲
p = logging.getLogger('foo')
p.setLevel(logging.DEBUG)
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(message)s')
ch.setFormatter(formatter)
p.addHandler(ch)

# 创建一个孩子logger
c = logging.getLogger('foo.bar')
c.debug('foo')