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 wrapslogging.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!