[Tutor] Recursive user input collection problem
davea at ieee.org
Thu Oct 15 13:54:23 CEST 2009
William Witteman wrote:
> Thanks to all who responded. There were several good points about the
> code itself, all of which both helped and work.
> I will likely use Alan's example because I find it the most lucid, but
> the other suggestions are good signposts to other ways to do the same
> thing (but right, as opposed to how I was doing it).
> Lie's suggestion that I didn't understand the calling structure of
> Python was right on the money, and his included link helps with that,
> too. Thanks again.
The problem with that approach is that you're still making unnecessary
recursive calls. The problem isn't a recursive one, so why take the
risks that artificial recursion imposes.
You need a loop, and putting a while True: around the whole thing
solves it nicely. Don't *call* the function again, just loop back and
do the operation again. That's what loops are for.
Incidentally, learning about recursion is a very good thing, and
useful. I just don't think it's the right answer here.
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