Guido van Rossum wrote:
> Hardly arbitary (I have fond memories of several languages that used
> :=).
I think augmented assignment should (ideally) also be rebinding, and :=
kindof looks like an augmented assignment, so I don't think it's all
that bad. I'd be used to it in a snap.
But: let's not get carried away with this particular spelling, the main
question is: "is it a good idea to have a rebinding assignment
operator?" (regardless of how that operator is spelled). Needless to
say, I think it is.
> But what is one to make of a function that uses both
>
> a := 2
>
> and
>
> a = 2
>
> ???
Simple, "a = 2" means 'a' is local to that function, so "a := 2" will
rebind in the same scope. So the following example will raise
UnboundLocalException:
def foo():
a := 3
a = 2
And this will just work (but is kindof pointless):
def foo():
a = 2
a := 3
And this would be a substitute for the global statement:
a = 2
def foo():
a := 3
(Alex noted in private mail that one disadvantage of this idea is that
it makes using globals perhaps TOO easy...)
Just
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