weirdness with list()

[Greg Ewing]

On 28/02/21 1:17 pm, Cameron Simpson wrote:
> [its length in bytes] is presented via the object's __len__ method,

> BUT... It also has a __iter__ value, which like any Box iterates over
> the subboxes.

You're misusing __len__ here. If an object is iterable and
also has a __len__, its __len__ should return the number of
items you would get if you iterated over it. Anything else
is confusing and can lead to trouble, as you found here.

> But is there a cleaner way to do this?

Yes. Give up on using __len__ to get the length in bytes,
and provide another way to do that.

-- 
Greg