Barry A. Warsaw wrote:
>  
>  >>>>> "TP" == Tim Peters <tim_one@[...].com> writes:
>  
>      TP> 7/16'ths of me too, but I believe the groundrules for the
>      TP> Scarecrow Proposal include "no language changes".  That leaves
>      TP> manual, or at best semi-automated, convention for now.  In a
>      TP> Python2 world, I doubt it would be more of an insanely
>      TP> protracted battle than usual <wink> to get a "defer" keyword
>      TP> added, provided it worked out in practice by hand first.
>  
>      TP> Given "def push(self, thing): defer" we could peek at the
>      TP> bytecode today, note the senseless LOAD_GLOBAL of "defer", and
>      TP> simply rewrite the user's code for them <cackle>.
>  
>  An easy change for Python 1.6 would be to add something like
>  NotImplementedError to exceptions.py and a defer() builtin function.
>  The latter has some potential for existing code breakage, but since
>  user definitions of that attribute will silently override the builtin
>  one, it's probably minimal.  That might get us far enough along for
>  1.6 to play while leaving open a `defer' keyword later.
>  
>  So trivial to implement, I've attached a patch set (against my hacked
>  1.5.2 -- watch for fuzz factor).  Extremely minimally tested.  Here's
>  what it looks like:

The Scarecrow implementation I posted earlier today provides this
functionality without any language or library changes.

Jim

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