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Tue Oct 21 10:28:16 EDT 2003 · https://mail.python.org/pipermail/python-dev/2003-October/039140.html

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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[Python-Dev] listcomps vs. for loops