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(python2.1-lib.info)atexit Example

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`atexit' Example
----------------

The following simple example demonstrates how a module can initialize a
counter from a file when it is imported and save the counter's updated
value automatically when the program terminates without relying on the
application making an explicit call into this module at termination.

     try:
         _count = int(open("/tmp/counter").read())
     except IOError:
         _count = 0
     
     def incrcounter(n):
         global _count
         _count = _count + n
     
     def savecounter():
         open("/tmp/counter", "w").write("%d" % _count)
     
     import atexit
     atexit.register(savecounter)