brett at python.org
Tue Mar 6 20:26:20 CET 2007
On 3/6/07, Jim Jewett <jimjjewett at gmail.com> wrote:
> On 3/5/07, Brett Cannon <brett at python.org> wrote:
> > On 3/5/07, Talin <talin at acm.org> wrote:
> > > [a,,b] = [1,2,3]
> > >
> > > In other words, a is assigned the value 1, the value 2 is thrown away,
> > > and b is assigned the value 3. In today's Python, this requires a dummy
> > > variable.
> > It skips in the middle?!? Yuck.
> Are you assuming variable-length skips, so that
> [a,,b] = [1,2,3,4,5] would mean a=1;b=5 ?
Yep, that's how I read it.
> I had read it is just not requiring a name for the unused dummy
> variable. It doesn't really seem worse than
> [a, _junk, b] = [1,2,3]
> or less explicit than
> [a,_,b] = [1,2,3]
Right, but why the ends? And what if that example had three variables
to unpack to, e.g., a, b, and c? With a = 1 and c = 5, what does b
get? 2, 4, 3? It can be intrepreted in so many ways its ambiguous
without referencing the documentation.
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