发生错误时自动重启程序

时间:2009-10-23 03:36:43

标签: python restart

程序是这样的:

HEADER CODE
urllib2.initialization()
try:
    while True:
        urllib2.read(somebytes)
        urllib2.read(somebytes)
        urllib2.read(somebytes)
        ...
except Exception, e:
    print e
FOOTER CODE

我的问题是何时发生错误(超时,由对等方重置连接等),如何从urllib2.initialization()而不是现有主程序重新启动并再次从HEADER CODE重新启动?

3 个答案:

答案 0 :(得分:5)

您可以将代码包装在“while not done”循环中:

#!/usr/bin/env python

HEADER CODE
done=False
while not done:
    try:
        urllib2.initialization()
        while True:
            # I assume you have code to break out of this loop
            urllib2.read(somebytes)
            urllib2.read(somebytes)
            urllib2.read(somebytes)
            ...
    except Exception, e:    # Try to be more specific about the execeptions 
                            # you wish to catch here
        print e
    else:
    # This block is only executed if the try-block executes without
    # raising an exception
        done=True
FOOTER CODE

答案 1 :(得分:4)

如何将它包装在另一个循环中?

HEADER CODE
restart = True
while restart == True:
   urllib2.initialization()
   try:
       while True:
           restart = False
           urllib2.read(somebytes)
           urllib2.read(somebytes)
           urllib2.read(somebytes)
           ...
   except Exception, e:
       restart = True
       print e
FOOTER CODE

答案 2 :(得分:2)

尝试限制的简单方法

HEADER CODE
attempts = 5
for attempt in xrange(attempts):
    urllib2.initialization()
    try:
        while True:
            urllib2.read(somebytes)
            urllib2.read(somebytes)
            urllib2.read(somebytes)
            ...
    except Exception, e:
        print e
    else:
        break
FOOTER CODE