[Python-ideas] Generators are iterators

[Alexander Belopolsky]

On Fri, Dec 12, 2014 at 2:28 PM, Ethan Furman <ethan at stoneleaf.us> wrote:

> > 3) there are essentially two (and a half) ways for python code authors
> to write their own, custom TIIP:
> >   1) write a class that has a __iter__ and __next__ methods that "do the
> right thing"
> >   2a) write a generator function
> >   2b) write a generator expression
>
>     3) write a class with __getitem__ that supports integer indexing
>

This gets you a custom iterable.  The corresponding iterator will be the
buitin iterator type:

>>> class X:
...   __getitem__ = None
...
>>> iter(X())
<iterator object at 0x10b2a70b8>
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