On Fri, 04 Nov 2005 08:08:42 +0000, Antoon Pardon wrote:
> One other way, to implement the += and likewise operators would be
> something like the following.
>
> Assume a getnsattr, which would work like getattr, but would also
> return the namespace where the name was found. The implementation
> of b.a += 2 could then be something like:
>
> ns, t = getnsattr(b, 'a')
> t = t + 2
> setattr(ns, 'a')
>
>
> I'm not arguing that this is how it should be implemented. Just
> showing the implication doesn't follow.
Follow the logical implications of this proposed behaviour.
class Game:
current_level = 1
# by default, games start at level one
def advance(self):
self.current_level += 1
py> antoon_game = Game()
py> steve_game = Game()
py> steve_game.advance()
py> steve_game.advance()
py> print steve_game.level
3
py> print antoon_game.level
What will it print?
Hint: your scheme means that class attributes mask instance attributes.
--
Steven.
--
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