[Python-ideas] Re: Add __keys__ or __items__ protocol

On Tue, Feb 18, 2020 at 11:47:16AM -0800, Ethan Furman wrote:

Whatever `dict.items()` returns, both for consistency and because `dict.items()` can become a simple alias for `dict.__items__`.

That means that every object wanting to make use of this protocol needs to create a complex set-like view object, which is neither easy nor obvious, and may not even be appropriate for some classes. -- Steven