[Python-ideas] Introduce collections.Reiterable

[Neil Girdhar]

I am proposing a new class "Reiterable" that is a subclass of Iterable.
 For example, a dictionary view is a reiterable.  It would be fine to pass
such an object to the function f.

Best,
Neil


On Thu, Sep 19, 2013 at 5:12 AM, Nick Coghlan <ncoghlan at gmail.com> wrote:

>
> On 19 Sep 2013 18:59, "Neil Girdhar" <mistersheik at gmail.com> wrote:
> >
> > Well, generators are iterable, but if you write a function like:
> >
> > def f(s):
> >      for x in s:
> >              do_something(x)
> >      for x in s:
> >              do_something_else(x)
> >
> > x should not be a generator.  I am proposing adding a function to
> itertools like auto_reiterable that would take s and give you an reiterable
> in the most efficient way possible.
>
> Generators *are* iterators, though, so they fail the second half of the
> check. Hence my question - is there any obvious case where "iterable but
> not an iterator" gives the wrong answer?
>
> Cheers,
> Nick.
>
> >
> >
> > On Thu, Sep 19, 2013 at 4:32 AM, Nick Coghlan <ncoghlan at gmail.com>
> wrote:
> >>
> >> My question would be, does the new class add anything that isn't
> >
> >
> >
>
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