[Python-Dev] PEP 479: Change StopIteration handling inside generators

[Chris Angelico]

On Sun, Nov 23, 2014 at 8:03 AM, Ron Adam <ron3200 at gmail.com> wrote:
>> Making comprehensions work more like generator expressions
>> would, IMO, imply making the same change to all for loops: having a
>> StopIteration raised by the body of the loop quietly terminate the
>> loop.
>
>
> I'm not suggesting making any changes to generator expressions or for loops
> at all.  They would continue to work like they currently do.

But if you're suggesting making list comps react to StopIteration
raised by their primary expressions, then to maintain the
correspondence between a list comp and its expanded form, for loops
would have to change too. Or should that correspondence be broken, in
that single-expression loop constructs become semantically different
from statement loop constructs?

ChrisA