[Python-Dev] Re: anonymous blocks

[Guido van Rossum]

[Guido]
> > An alternative that solves this would be to give __next__() a second
> > argument, which is a bool that should be true when the first argument
> > is an exception that should be raised. What do people think?
> >
> > I'll add this to the PEP as an alternative for now.

[Nick]
> An optional third argument (raise=False) seems a lot friendlier (and more
> flexible) than a typecheck.

I think I agree, especially since Phillip's alternative (a different
method) is even worse IMO.

> Yet another alternative would be for the default behaviour to be to raise
> Exceptions, and continue with anything else, and have the third argument be
> "raise_exc=True" and set it to False to pass an exception in without raising it.

You've lost me there. If you care about this, can you write it up in
more detail (with code samples or whatever)? Or we can agree on a 2nd
arg to __next__() (and a 3rd one to next()).

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)