question about generators
greg
greg at cosc.canterbury.ac.nz
Fri Aug 16 04:32:27 EDT 2002
Andrew Koenig wrote:
> At first I wondered if perhaps calling a generator from
> another generator, and not doing anything with the results, should
> automatically yield them, but decided that was too clever. Still, I
> wondered if there was an easier way of doing this program
> transformation. So far, apparently there isn't.
Actually, there is a way, sort of, although it doesn't
involve using Python generators. You can write it in
so-called "continuation passing style" like this:
def f(produce_result):
for ...:
if ...:
produce_result(x)
else:
...
f(produce_result)
...
and you call it with a function (or some other callable
object) that does what you want done with each value.
This is very similar to the way Icon works under the
covers.
Greg Ewing
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