Thu, 21 Oct 2010 11:03:52 -0600, Charles R Harris wrote: [clip] > I think the important thing to settle here is just how dtype comparisons > are supposed to work. The current implementation might well be intended > and if so we need to know why it is so. I'd like Travis to weigh in > here.
To me it seems that sub-arrays were not considered in the initial implementation for `==`. I do not see reasons why one would want to have a = dtype([('a', 'i1', (3, 3))]) b = dtype([('a', 'i1', 9)]) a == b In any case the current implementation is inconsistent, since currently hash(a) != hash(b) However, I can see why one would want to have CanCastSafely to be true between these types. *** The other issue of allowing broadcasting in sub-arrays --- it does not seem very useful to me. Unlike arrays, the dimensions of sub-arrays cannot be manipulated easily, and so many use-cases of broadcasting just disappear. Pauli _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion