[Python-ideas] sentinel_exception argument to `iter`

[Ram Rachum]

On Friday, February 7, 2014 11:49:12 AM UTC+2, Stephen J. Turnbull wrote:
>
> Steven D'Aprano writes: 
>
>  > iter(func, "NOBODY expects the Spanish Inquisition!!!") 
>
> +1 Code Snippet of the Week! 
>

A++, would run again :)

Now back to serious discussion: I do prefer a separate keyword argument 
rather than reusing `sentinel`. If `sentinel_exception` is too verbose, 
then an alternative is `exception`, but just not `stop_iter` which is very 
undescriptive.

Also, I'd support having three separate implementations for the `iter` 
function, one for just sentinel, one for exception, and one for both, so 
the iteration would be as quick as possible after the iterator was created.


Thanks,
Ram.
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