Post Syndicated from original https://lwn.net/Articles/904777/

Back in November, we looked at a Python proposal
to have function arguments with defaults that get
evaluated when the function is called, rather than when it is defined.
The article suggested that the discussion surrounding the proposal was
likely to continue on for a ways—which it did—but it had died down by the
end of last year. That all changed in mid-June, when the already voluminous
discussion of the feature picked up again; once again, some people thought that
applying the idea only to function arguments was too restrictive. Instead,
a more general mechanism to defer evaluation was touted as something that
could work for late-bound arguments while being useful for other use cases as
well.