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.