[Python-Dev] Fwd: try...else

[M.-A. Lemburg]

Mark Hammond wrote:
> 
> Spotted on c.l.python.  Although Pythonwin is mentioned, python.exe
> gives the same results - as does 1.5.2.
> 
> Seems a reasonable question...
> 
> [Also, if Robin hasn't been invited to join us here, I think it could
> make some sense...]
> 
> Mark.
> -------- Original Message --------
> Subject: try...else
> Date: Fri, 22 Dec 2000 18:02:27 +0000
> From: Robin Becker <robin@jessikat.fsnet.co.uk>
> Newsgroups: comp.lang.python
> 
> I had expected that in try: except: else
> the else clause always got executed, but it seems not for return

I think Robin mixed up try...finally with try...except...else.
The finally clause is executed even in case an exception occurred.

He does have a point however that 'return' will bypass 
try...else and try...finally clauses. I don't think we can change
that behaviour, though, as it would break code.
 
> PythonWin 2.0 (#8, Oct 16 2000, 17:27:58) [MSC 32 bit (Intel)] on
> win32.Portions Copyright 1994-2000 Mark Hammond (MarkH@ActiveState.com)
> - see 'Help/About PythonWin' for further copyright information.
>  >>> def bang():
> ....     try:
> ....             return 'return value'
> ....     except:
> ....             print 'bang failed'
> ....     else:
> ....             print 'bang succeeded'
> ....
>   >>> bang()
> 'return value'
>  >>>
> 
> is this a 'feature' or bug. The 2.0 docs seem not to mention
> return/continue except for try finally.
> --
> Robin Becker
> 
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-- 
Marc-Andre Lemburg
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