[Python-Dev] enumerate with a start index

[Josiah Carlson]

Michel Pelletier <michel at cignex.com> wrote:
> 
> Martin Blais wrote:
> > Hi
> > 
> > Just wondering, would anyone think of it as a good idea if the
> > enumerate() builtin could accept a "start" argument?  I've run across
> > a few cases where this would have been useful.  It seems generic
> > enough too.
> 
> +1, but something more useful might be a a cross between enumerate a 
> zip, where you pass N iterables and it yields N-tuples.  Then you could 
> do something like:
> 
> zipyield(range(10, 20), mygenerator())
> 
> and it would be like you wanted for enumerate, but starting from 10 in 
> this case.

All of this already exists.

    from itertools import izip, count

    for i,j in izip(count(start), iterable):
        ...

Read your standard library.

 - Josiah