python logging模块的使用

import logging

file_handler = logging.FileHandler(filename='x1.log', mode='a', encoding='utf-8',)
logging.basicConfig(
  format='%(asctime)s - %(name)s - %(levelname)s -%(module)s: %(message)s',
  datefmt='%Y-%m-%d %H:%M:%S %p',
  handlers=[file_handler,],
  level=logging.ERROR
)

logging.error('你好')

import time
import logging
from logging import handlers

sh = logging.StreamHandler()
rh = handlers.RotatingFileHandler('myapp.log', maxBytes=1024,backupCount=5)
fh = handlers.TimedRotatingFileHandler(filename='x2.log', when='s', interval=5, encoding='utf-8')
logging.basicConfig(
  format='%(asctime)s - %(name)s - %(levelname)s -%(module)s: %(message)s',
  datefmt='%Y-%m-%d %H:%M:%S %p',
  handlers=[fh,sh,rh],
  level=logging.ERROR
)

for i in range(1,100000):
  time.sleep(1)
  logging.error('KeyboardInterrupt error %s'%str(i))

import logging

logger = logging.getLogger()
# 创建一个handler，用于写入日志文件
fh = logging.FileHandler('test.log',encoding='utf-8')
fh.setLevel(logging.DEBUG)

# 再创建一个handler，用于输出到控制台 
ch = logging.StreamHandler()
ch.setLevel(logging.INFO)

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

fh.setFormatter(formatter) 
ch.setFormatter(formatter) 

#logger对象可以添加多个fh和ch对象 
logger.addHandler(fh) 
logger.addHandler(ch) 

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