007---logging日志模块

logging模块

• 用途：服务器运行日志、运维日志...

import logging

from logging.handlers import RotatingFileHandler, TimedRotatingFileHandler

# 1.生成logger对象

logger = logging.getLogger('web')

logger.setLevel(logging.DEBUG)          # 先设置全局过滤，不然后面的设置debug也是无效的

# 2.生成handler对象

ch = logging.StreamHandler()            # 输出到屏幕

fh = logging.FileHandler('web.log')     # 输出到文件

fh1 = RotatingFileHandler('web1.log', maxBytes=100, backupCount=3)

fh2 = TimedRotatingFileHandler('web2.log', when='S', interval=5)

ch.setLevel(logging.CRITICAL)

fh.setLevel(logging.ERROR)              # 可对每个handler设置级别，也可以设置全局：默认warning

fh1.setLevel(logging.DEBUG)

# 2.1把handler对象绑定到logger对象

logger.addHandler(ch)

logger.addHandler(fh)

logger.addHandler(fh1)

logger.addHandler(fh2)

# 3.生成formatter对象

file_fmt = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

file1_fmt = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

file2_fmt = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

console_fmt = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(lineno)s - %(message)s')

# 3.1 把formatter绑定到handler对象

ch.setFormatter(console_fmt)

fh.setFormatter(file_fmt)

fh1.setFormatter(file1_fmt)

fh2.setFormatter(file2_fmt)

logger.debug('test log1')

logger.info('test_log2')

logger.warning('test_log3')

logger.error('test_log4')

logger.critical('test_log5')