yield from () Was: Re: weirdness with list()

[Alan Gauld]

On 28/02/2021 00:17, Cameron Simpson wrote:

> BUT... It also has a __iter__ value, which like any Box iterates over 
> the subboxes. For MDAT that is implemented like this:
> 
>     def __iter__(self):
>         yield from ()

Sorry, a bit OT but I'm curious. I haven't seen
this before:

yield from ()

What is it doing?
What do the () represent in this context?

-- 
Alan G
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