[Python-Dev] enumerate with a start index (original) (raw)

Josiah Carlson jcarlson at uci.edu
Thu Oct 20 01:28:29 CEST 2005

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.

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