tjreedy at udel.edu
Wed Jun 10 22:36:27 CEST 2009
> Hello everyone,
> Since the real world objects often needs to be deleted even if they
> have some reference from some other object, I am going to use this
> approach to better model this situation, by cleaning up the attributes
> and assigning self.__class__ to a different class.
> Any comment on this approach.
It might be easier to give the class a status variable so instances can
be de-activated without destroying info and perhaps re-activated.
> class Deleted(object):
> class RealWorldObj(object):
> def __init__(self, *args):
> self.attrs = args
> def getAttrs(self,):
> return self.attrs
> def delete(self,):
> del self.attrs
> self.__class__ = Deleted
>>>> a = RealWorldObj(1,2,3)
>>>> print a.attrs
> (1, 2, 3)
> <__main__.Deleted object at 0x893ae2c>
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> AttributeError: 'Deleted' object has no attribute 'attrs'
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