> Guido van Rossum <guido@python.org> writes: > > > - We need fallbacks for various exceptional cases: > > I think assignment to __class__ also needs to be > considered. Therefore, it may be best if the member array is a > separate block (not allocated with the instances). Good point. When __class__ is assigned and the new __class__ has a different layout of the member array then the old, all instance variables must be moved from the member array into a temporary dict, and then from the temporary dict redistributed over the new member array. If you're lucky, the temporary dict is empty after that; otherwise, it becomes the overflow dict. > It might also be worthwhile to incorporate __slots__ access into that > scheme, to avoid having to find the member descriptor in the class > dictionary. __slots__ are really allocated in the object, not in a separate memory block. But I agree it would be nice if they could somehow be integrated. --Guido van Rossum (home page: http://www.python.org/~guido/)
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