[$] From late-bound arguments to deferred computation, part1

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