时发生错误

Question

程序自动重新启动程序是这样的：

HEADER CODE 
urllib2.initialization() 
try: 
    while True: 
     urllib2.read(somebytes) 
     urllib2.read(somebytes) 
     urllib2.read(somebytes) 
     ... 
except Exception, e: 
    print e 
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发生错误时我的问题是（超时，通过对等连接复位等），如何从urllib2.initialization重新启动（）代替现有主程序并重新从头文件重新启动？

Answer 1

简单的方式

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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 
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Answer 2

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 
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Answer 3

你可以在 “而不是做” 循环包装你的代码：与尝试限制

#!/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 
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