python重試裝飾器示例

代碼如下:

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

代碼如下:

#!/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()

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