According to https://docs.python.org/3/glossary.html#term-iterator and https://docs.python.org/3/library/stdtypes.html#typeiter, iterators must implement the __iter__ method. On Sun, 2021-11-28 at 22:02 -0500, David Mertz, Ph.D. wrote:
On Sun, Nov 28, 2021, 8:59 PM Steven D'Aprano
To be an iterator, your object needs:
1. a `__next__` method which returns the next value; 2. and an `__iter__` method which returns self.
That's not quite right.
An iterator only needs .__next__(), and an iterable only needs .__iter__(). Returning self is a convenient, and probably the most common, way of creating an object that is both. But exceptions exist, and remain iterators and/or iterables.
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