python - 发生错误时自动重启程序

Question

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

我的问题是当发生错误时(超时、连接被对等方重置等)，如何从 urllib2.initialization() 而不是现有的主程序重新启动并再次从 HEADER CODE 重新启动？

Answer 1

你可以将你的代码包装在一个“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