On Sat, Oct 23, 2021 at 7:55 PM Steven D'Aprano <[email protected]> wrote:
>
> And is it really a problem if we delay the late-binding to the point
> where the value is actually needed? ...
<snip>
[in that csse] I would stick to manual late-
> binding using None, and only evaluate it as needed.
>
> Maybe this is an argument for some sort of thunk, as in Algol, which is
> only evaluated at need.
> <snip>
I have no idea whether thunk-like functionality is workable in Python's
> execution model without slowing down every object reference, but if it
> is possible, there could be other really nice use-cases beyond just
> function defaults.
>
Your message here and my message on this passed in the mail. Yes, this is
a really good point and would apply to the cases I've seen where the
evaluation was in the middle. Thanks for raising it. I also don't know if
it's workable but it should be considered.
--- Bruce
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