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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: A question about class as an iterator
Date: Sun, 28 Aug 2011 17:26:11 -0400
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On 8/28/2011 1:22 PM, Ya=C5=9Far Arabac=C4=B1 wrote:

> I got confused about classes as an iterator. I saw something like this:=

>
> class foo():
>      __iter__(self):
>          return self
>      next(self):
>          return something

2.x

> But then I saw a __next__ method on some code.

3.x
This might work in 2.6 or .7, but I do not really know.

The next() builting was introduced in 2.6 so that *users* could write
item =3D next(someiter)
and have that work in 2.6+ and in 3.x without change.

> which one should I use?

Depends on your Python version. I recommend you use 3.2 unless you have=20
a reason or need to use something else.

--=20
Terry Jan Reedy