Twice instanciation
user at domain.invalid
user at domain.invalid
Fri Jun 13 08:49:54 EDT 2003
Michele Simionato wrote:
>
> You can do this:
>
> class DoubleInstantiationError(Exception): pass
>
> class Global:
> alreadyinstantiated=False
> def __init__(self,init=0):
> if self.__class__.alreadyinstantiated:
> raise DoubleInstantiationError()
> self.value = init
> self.__class__.alreadyinstantiated=True
>
> g = Global() #instanciating one time ok
> print g
> g = Global() #instanciating two times would raise an exception
Until there it's ok ;-)
> Notice that you would have an exception even using a different name
> for 'g' the second time.
But this is not ok for my purpose :-)
Anyway, thank you very much for your help Michele
Regards
Salvatore
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