Travis Oliphant wrote: >Tim Hochberg wrote: > > > >>I was going to say that it may help to think of array_interface as >>returning a *view*, since that seems to be the semantics that could >>probably be implemented safely without too much trouble. However, it >>looks like that's not what happens. array_interface->shape and strides >>point to the raw shape and strides for the array. That looks like it's a >>problem. Isn't: >> >> >> >>>>>ai = a.__array_interface__ >>>>>a.shape = newshape >>>>> >>>>> >>going to result in ai having a stale pointers to shape and strides that >>no longer exist? >> >> >> >This is an implementation detail. I'm still trying to gather some kind >of consensus on what to actually do here. > There were three things mixed together in my post:
1. The current implementation of __array_struct__ looks buggy. Should I go ahead and file a bug report so that this behaviour doesn't get blindly copied over from __array_struct__ to whatever the final dohickey is called or is that going to be totally rewritten in any case. 2. Whether __array_struct__ or __array_interface__ or whatever it gets called returns something that's kind of like a view (has it's own copies of shape and strides mainly) versus an alias for the original array (somehow tries to track the original arrays shape and strides) is a semantic difference, not an implementation details. I suspect that no one really cares that much about this and we'll end up doing what's easiest to get right; I'm pretty certain that is view semantics. It may be helpful to pronounce on that now, since it's possible the semantics might influence the name chosen, but I don't think it's critical. 3. The implementation details I provided were, uh, implentation details. -tim > There is no such >__array_interface__ attribute at this point. > > >-Travis > > > >_______________________________________________ >Numpy-discussion mailing list >Numpy-discussion@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/numpy-discussion > > > > _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
