[Python-Dev] listcomps vs. for loops

Tue Oct 21 10:28:16 EDT 2003

On Tue, Oct 21, 2003 at 12:41:00PM +0100, Michael Hudson wrote:
> Guido van Rossum <guido at python.org> writes:
>> > I don't recall what I said then. Did I say it was a feature that
> >
> > L = [x for x in R]
> > print x
> >
> > would print the last item of R?
>> A problem with such code irrespective of anything else is that it
> fails when R is empty.
>
 Not when x is properly initialized. Anyway, this is no different from the
problem of:
 for x in R:
 ...
 print x
 In any case, are there plans to also have the compiler emit warnings about
potential reliance on this feature?
 Jp
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