None & Ellipsis

John Farrell jfarrell at mincom.com
Tue Feb 22 00:36:42 CET 2000


Fredrik Lundh wrote:
> Moshe Zadka <moshez at math.huji.ac.il> wrote
> > Yes. It's called the "Python 3 namespace rule".
> 
> exactly.  and combined with the "local variables
> are detected by static analysis" rule, things get
> really weird.  consider this:
> 
>     def mylongfunction():
>         a = None
>         # ...
>         # a few hundred lines of computation
>         # ...
>         a = 1, 2, 3
>         None, None, b = a
> 
> this results in an exception.  on what line?

Ooh, nasty. My guess is on the a = None line, because None has been
determined to be a local variable by static analysis. Trying to
evaluate the local variable before it is assigned to causes the
error.

of-course-you-can't-run-it-that-would-be-cheating-ly yours

John
-- 
Dr John Farrell - Research Architect - Mincom Limited

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