On Mon, Nov 24, 2014 at 4:21 PM, Alexander Belopolsky < alexander.belopol...@gmail.com> wrote:
> > On Wed, Nov 19, 2014 at 3:10 PM, Guido van Rossum <gu...@python.org> > wrote: > >> There's a new PEP proposing to change how to treat StopIteration bubbling >> up out of a generator frame (not caused by a return from the frame). The >> proposal is to replace such a StopIteration with a RuntimeError (chained to >> the original StopIteration), so that only *returning* from a generator (or >> falling off the end) causes the iteration to terminate. > > > I think the PEP should also specify what will happen if the generator's > __next__() method is called again after RuntimeError is handled. The two > choices are: > > 1. Raise StopIteration (current behavior for all exceptions). > 2. Raise RuntimeError (may be impossible without gi_frame). > > I think choice 1 is implied by the PEP. > Good catch. It has to be #1 because the generator object doesn't retain exception state. I am behind with updating the PEP but I promise I won't mark it as Accepted without adding this, the transition plan, and a discussion of some of the objections that were raised. -- --Guido van Rossum (python.org/~guido)
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