python重试装饰器示例

利用python 写一些网络服务的时候，当网络状况不好，或者资源占用过多，任务拥塞的情况下，总会抛出一些异常，当前任务就被终止了，可以很好的利用@装饰器，写一个重试的装饰器，这样比较python！
执行结果：

WARNING:root:timed out, Retrying in 3 seconds...
WARNING:root:timed out, Retrying in 6 seconds...
WARNING:root:timed out, Retrying in 12 seconds...

#!/usr/bin/env python
# -*- coding: utf-8 -*- 
# tanyewei@gmail.com
# 2014/01/27 10:36
import time
import logging
import socket
from functools import wraps

logging.basicConfig(level=logging.DEBUG)
def retry(MyException, tries=4, delay=3, backoff=2, logger=None):
 def deco_retry(f):
 @wraps(f)
 def f_retry(*args, **kwargs):
 mtries, mdelay = tries, delay
 while mtries > 1:
 try:
 return f(*args, **kwargs)
 except MyException as ex:
 msg = "%s, Retrying in %d seconds..." % (str(ex), mdelay)
 if logger:
 logger.warning(msg)
 else:
 print msg
 time.sleep(mdelay)
 mtries -= 1
 mdelay *= backoff
 return str(ex)
 return f_retry
 return deco_retry
@retry(Exception, logger=logging)
def check():
 sk = socket.socket()
 sk.settimeout(5)
 sk.connect(('6.6.6.6', 80))
if __name__ == "__main__":
 check()

到此这篇关于python重试装饰器示例就介绍到这了。前有阻碍，奋力把它冲开，运用炙热的激情，转动心中的期待，血在澎湃，吃苦流汗算什么。更多相关python重试装饰器示例内容请查看相关栏目，小编编辑不易，再次感谢大家的支持！