[Python-Dev] PEP for Better Control of Nested Lexical Scopes

Tue Feb 21 22:13:22 CET 2006

Mark Russell wrote:
> On 21 Feb 2006, at 19:25, Jeremy Hylton wrote:
>>>If I recall the discussion correctly, Guido said he was open to a
>>version of nested scopes that allowed rebinding.
>>> PEP 227 mentions using := as a rebinding operator, but rejects the 
> idea as it would encourage the use of closures. But to me it seems 
> more elegant than some special keyword, especially is it could also 
> replace the "global" keyword. It doesn't handle things like "x += y" 
> but I think you could deal with that by just writing "x := x + y".

By rebinding operator, does that mean it is actually an operator? I.e.:
 # Required assignment to declare?:
 chunk = None
 while chunk := f.read(1000):
 ...
-- 
Ian Bicking / ianb at colorstudy.com / http://blog.ianbicking.org