[Python-Dev] Re: Should the definition of an "(async) iterator" include __iter__?

I think it's also worth noting that a missing "`__iter__` that returns self" is trivial to recover from... just use a new reference to the iterator instead. The overhead of a method call for this convention almost seems silly. What worries me most about changing the current "requirement" is that it may create either confusion or backward compatibility issues for `collections.abc.Iterator` (which is a subtype of `Iterable`, and thus requires `__iter__`).