Scheme style and Python style [was: Re: Typed Python?]

[Christopher T King]

On Tue, 13 Jul 2004, [iso-8859-1] François Pinard wrote:

> [Christopher T King]
> 
> > It may be possible to do what you want to do using only generators.
> 
> > continuation=dostuff()
> > try:
> >     value=continuation.next()
> > except StopIteration:
> >     <store continuation away for future use>
> > else:
> >     <function completed, carry on>
> 
> If the generator gets exhausted, what would be the purpose of saving it?

Oops, I got that backwards. It should read:

continuation=dostuff()
try:
    value=continuation.next()
except StopIteration:
    <function completed, carry on>
else:
    <store continuation away for future use>

> I would presume chained generators might ease control of the flow, at
> least to a certain extent, but would not help so much for complex state
> resumption, especially when state is shared between parts of the program.

And hence the need for continuations ;) Perhaps if there was a way to 
resume code that was interrupted by an exception?