[Python-Dev] Explicit Lexical Scoping (pre-PEP?)
Guido van Rossum
guido at python.org
Wed Jul 5 12:02:16 CEST 2006
On 7/5/06, Just van Rossum <just at letterror.com> wrote:
> Guido van Rossum wrote:
> > On 7/5/06, Phillip J. Eby <pje at telecommunity.com> wrote:
> > > Did you also consider and reject:
> > >
> > > * Alternate binding operators (e.g. ":=", ".=", etc.)
> > Brr.
> That's too bad :(
> I still find a rebinding operator (":=" being my favorite) much, *much*
> more appealing than any of the alternative proposals. It's beautifully
> symmetrical with "assignment means local". It also pretty much makes the
> global statement redundant.
> The only downside I see is that it may cause a fairly big shift in
> style: I for one would use := for rebinding local names. While I think
> that would be an improvement (eg. by catching typo's earlier), it's
Hallo broer! :-)
I wonder what this should mean then:
x := 1
What is x's scope?
Also, a := operator allows all sorts of left-hand sides that don't
necessarily make sense, e.g.
x.foo := 1
x := 1
--Guido van Rossum (home page: http://www.python.org/~guido/)
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