[Numpy-discussion] copy on demand

[Konrad Hinsen]

> > Then the only solution I see is the current one: default behaviour is
> > view, and when you want a copy yoy copy explicitly. The inverse is not
> > possible, once you made a copy you can't make it behave like a view
> > anymore.
> 
> I don't think it is necessary to create the other object _from_
> the default one.  You could have copy behavior be the default,
> and if you want a view of some array you simply request one
> explicitly with .view, .sub, or whatever.

Let's make this explicit. Given the following four expressions,

1) array
2) array[0]
3) array.view
4) array.view[0]

what would the types of each of these objects be according to your
proposal? What would the indexing behaviour of those types be?
I don't see how you can avoid having either two types or two
different behaviours within one type.

Konrad.
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