> class Spam(object):
> cache = {}
> def __new__(cls, x):
> if cls.cache.has_key(x):
> return cls.cache[x]
> def __init__(self, x):
> self.x = x
> self.cache[x] = self
>
> a = Spam('foo')
> b = Spam('foo')
>
> Well, in this case a and b are identical... to None! I assume this is
> because the test in __new__ fails so it returns None, I need to then
> create a new Spam.. but how do I do that without calling __new__
> again?
> I can't call __init__ because there's no self...
>
>
Oops, you forgot to return object.__new__(cls, x) in the case the
object isn't in the cache. That should fix it.
Jonathan
http://cleverdevil.org
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