Francesc Altet wrote:

Hi,

I've lately ran into problems in numarray-->numpy conversions which are due to a lack of suport of the array procol version 3 on behalf of numarray. For more info on this issue see:

http://projects.scipy.org/scipy/numpy/ticket/256

and

http://projects.scipy.org/scipy/numpy/ticket/266

Question: is the numarray crew going to add this support anytime soon? If not, I'd advocate to retain support for version 2 in NumPy at least for sometime (until numarray gets the support), although I don't know whether this will complicate things a lot in NumPy.

I personally don't need this functionality as I've found a workaround for PyTables (i.e. using the numpy.ndarray factory in order to create the NumPy object directly from the numarray buffer), but I think this would be very useful in helping other users (end-users mainly) in the numarray-->NumPy transition.

Remember it's only the Python-side of version 2 of the protocol that is not supported. The C-side is still supported. Thus, it's only objects which don't export the C-side of the interface that are affected. In numarray that is the chararray and the recarray. Normal numarray arrays should work fine as the C-side of version 2 is still supported. I think the number of objects supporting the Python side of version 2 of the protocol is small enough that it is not worth the extra hassle (and attribute lookup time) in NumPy to support it. It would be a good thing if numarray supported version 3 of the protocol by adding the __array_interface__ attribute to support the Python side of version 3. -Travis