Hi Steve,

take a look at part 8.3 Handling Exceptions of the Python tutorial. It 
states:
"The try ... except statement has an optional /else clause/, which, when 
present, must follow all except clauses. It is useful for code that must 
be executed if the try clause *does not* raise an exception."

Take a look at your code, now. If main raises any exception, it is 
reraised and never handled. Furthermore the else clause is never 
executed. I think the following piece of code demonstrates pretty clear 
what happens:

import sys

def main():
    print "In function main."
    #raise

try:
    main()
except:
    print "Exception catched in __main__"
    raw_input("Please press Enter to quit")
else:
    print "In else-clause of try-except-else clause"
    print "Press RETURN to exit..."
    sys.stdin.readline()

Save it in a file and double click on it. The window remains open and 
you will get the following output:

In function main.
In else-clause of try-except-else clause
Press RETURN to exit...

Uncomment the raise statement in function main. Double click, again. The 
window remains open and you get the following output:

In function main.
Exception catched in __main__
Please press Enter to quit

HTH
Frank


smr@[...].ca schrieb:
>  Howdy,
> 
>  I installed Active State Python, and wrote a simple script, say
>  'foo.py'.  If I double-click on 'foo.py' from the windows explorer, a
>  console window opens, the script executes, and the window closes
>  again.
> 
>  I'd like the window to stick around if there are any exceptions
>  raised.  I tried to put all my code in function main() and use
> 
>  try:
>      main()
>  except None:
>      raise
>  else:
>      print "Press RETURN to exit..."
>      sys.stdin.readline()
> 
> 
>  No dice: the window closes even if main() raises an exception.  
>  Any idea how to do it?
> 
>  Thanks,
>  -Steve
> 
>  _______________________________________________
>  ActivePython mailing list
>  ActivePython@[...].com
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> 
> 
>    
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