On Mon, 12 Dec 2005 08:26:59 +0000, Steve Holden <[EMAIL PROTECTED]> wrote:
[...]
>
>The scoping rules do work when you obey them:
>
> >>> def f1(a, b):
> ... s = a+b
> ... def _(x):
> ... return s+x
> ... return _
> ...
> >>> func = f1(12, 13)
> >>> func(10)
>35
> >>>
>
>Here the nested lexical scopes rule isn't that helpful given the
>overriding nature of assignment within an inner scope. Using global will
>simply put the status variable at *module* scope, which also isn't what
>you want.
>
Is external rebindability being considered at all ?
what if it were a new builtin that could do it in C, e.g. rebind(targetname,
expr)
where target could be in any enclosing scope (including globals(),
but not extending to __builtins__) and it would be a NameError if target
didn't exist. Thus this would be possible (untested and currently impossible ;-)
def mkbumper(initval, incr):
def _():
rebind('initval', initval+incr) # vs initval := initval+incr
return initval
return _
bump3 = mkbumper(8, 3)
bump3() => 11
bump3() => 14
I wonder if a function would fly better than a punctuation tweak on
bare name assignment ;-)
Regards,
Bengt Richter
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