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：
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…
代码如下:
#!/usr/bin/env python# -*- coding: utf-8 -*- # tanyewei@gmail.com# 2014/01/27 10:36import timeimport loggingimport socketfrom 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()