> > def foo():
> >    yield 1
> >    yield 2
> >    yield 3

> > f = foo()
> > f.next()
> > 1

> > g=copy(f)  # copy the generator after an iteration

> > f.next()
> > 2
> > f.next()
> > 3

> > g.next()      
> > 2

> > I want to copy the generator's state after one or more iterations.

> You could use itertools.tee():

>  >>> def foo():
> ...     yield 1
> ...     yield 2
> ...     yield 3
> ...
>  >>> import itertools
>  >>> f = foo()
>  >>> f.next()
> 1
>  >>> f, g = itertools.tee(f)
>  >>> f.next()
> 2
>  >>> f.next()
> 3
>  >>> g.next()
> 2
>  >>> g.next()
> 3

> But note that if your iterators get really out of sync, you could have a
> lot of elements stored in memory.

> STeVe