[Tutor] question concerning deepcopy
kent37 at tds.net
Sat Apr 29 12:49:59 CEST 2006
Gregor Lingl wrote:
> Thanks, Kent for the hint. It works (of course).
> Skimming through this part of the docs I discovered, that there is a
> special method __deepcopy__. So I also tried using this, adding
> def __deepcopy__(self,visit):
> return self
> to my Vec class, which also seems to work. (I think this not to
> be harmful as Vecs should be, like tuples, immutable).
> And, indeed, it also seems to work.
That is not a correct deep copy, it is a shallow copy. Although Vec
objects are immutable they may contain mutable objects. The point of
deep copy is to copy "all the way down" so the objects contained by a
Vec should also be copied.
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