[Python-ideas] Possible PEP 380 tweak
rrr at ronadam.com
Wed Oct 27 17:01:00 CEST 2010
On 10/25/2010 10:25 PM, Guido van Rossum wrote:
> By the way, here's how to emulate the value-returning-close() on a
> generator, assuming the generator uses raise StopIteration(x) to mean
> return x:
> def gclose(gen):
> except StopIteration, err:
> if err.args:
> return err.args
> except GeneratorExit:
> return None
> I like this because it's fairly straightforward (except for the detail
> of having to also catch GeneratorExit).
> In fact it would be a really simple change to gen_close() in
> genobject.c -- the only change needed there would be to return
> err.args. I like small evolutionary improvements to APIs.
Here's an interesting idea...
It looks like a common case for consumer co-functions is they need to be
started and then closed, so I'm wondering if we can make these work context
managers? That may be a way to reduce the need for the try/except blocks
inside the generators.
with my_cofunction(args) as c:
... use c
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