singleton decorator

[Wildemar Wildenburger]

Pedro Werneck wrote:
>>>> class Singleton(object):
> ...     def __new__(cls, *args, **kwds):
> ...             try:
> ...                     return cls._it
> ...             except AttributeError:
> ...                     cls._it = object.__new__(cls, *args, **kwds)
> ...                     return cls._it
> 
> But __init__ will be called once for each time you call A, even if it's
> always the same instance returned. If this is a problem, you'll need
> another method to use for initialization and call it only once.
> 

Or you could always just use the __new__() method instead of __init__(), 
putting all your initialization into the above except-block. If you 
replace 'cls._it = ...' with 'self = cls_it = ...' you'll feel right at 
home too :).

Anything 'unpythonic' (gosh how I hate that word ;)) about that, BTW?

c.u.
wildemar