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：

复制代码 代码如下:

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

复制代码 代码如下:

!/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()