[Python-Dev] PEP 343 - New kind of yield statement?

[Paul Moore]

On 5/19/05, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
> Michael Hudson wrote:
> 
> > This is, to me, neat and clear.  I don't find the idea that iterators
> > are tied to exactly 1 for loop an improvement (even though they
> > usually will be).
> 
> To fix this in a fully backward-compatible way, we
> need some way of distinguishing generators that
> expect to be finalized.

I don't see anything that needs to be "fixed" here. Sure, generators
that expect to be finalised will not be finalised simply by the fact
that a for loop exits, but that's fine - it's not part of the spec of
a for loop that it does finalise the generator. Adding that guarantee
to a for loop is a change in spec, not a fix.

Paul.