singleton ... again
Dave Angel
davea at davea.name
Wed Feb 12 00:48:51 EST 2014
Asaf Las <roegltd at gmail.com> Wrote in message:
> playing a bit with subject.
>
> pros and cons of this approach? did i create bicycle again? :-)
>
> class myclass(object):
> class_instance = None
>
> def __new__(cls, *args, **kwargs):
> if myclass.class_instance == None:
> return object.__new__(cls)
> return myclass.class_instance
>
> def __init__(self, some):
> if self.__class__.class_instance == None: # init blocker
> self.__class__.class_instance = self
> self.member = some
>
> def __del__(self):
> self.__class__.class_instance = None
>
> one_class = myclass(1)
> print(id(one_class), one_class.member )
>
> two_class = myclass(2)
> print(id(two_class), two_class.member)
>
>
Perhaps if you would state your actual goal, we could judge
whether this code is an effective way to accomplish
it.
--
DaveA
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