On 21 June 2012 13:05, Dag Sverre Seljebotn <d.s.seljeb...@astro.uio.no> wrote: > On 06/21/2012 01:36 PM, Stefan Behnel wrote: >> >> Dag Sverre Seljebotn, 21.06.2012 13:10: >>> >>> On 06/21/2012 10:59 AM, Stefan Behnel wrote: >>>> >>>> I find this worth fixing for 0.17: >>>> >>>> http://trac.cython.org/cython_trac/ticket/780 >>> >>> >>> I'm not sure about the timeline here. >>> >>> The object<->memoryview semantics haven't even been hammered down yet; >>> does >>> "mview.customattr" trigger an AttributeError, SyntaxError or fall back to >>> some underlying object (constructing it if necesarry). >>> >>> Until that happens, memoryviews are an experimental feature and present >>> for >>> development purposes mostly, so it's not like this is a big bug that >>> would >>> bite end-users. Thinking about those semantics is much more important... >> >> >> Absolutely. >> >> I ran into this when I gave a Cython+NumPy course and this was the first >> thing that the attendants tried when I asked them to validate that two >> input arrays have the same size before adding them. It's the one obvious >> way to do it, and it fails miserably. I think it should be fixed, and I >> think it should be fixed soon because it feels really low-level and >> complicated, especially to new users. > > > Can you clarify a bit -- did you give this course using np.ndarray[double, > ndim=2], or double[:, :]? They're really very separate under the hood and > the fix is different.
I think we should support both, although it seems a bit of a shame to fix something just a while before deprecating it :) Anyway, both fixes are really straightforward anyway. > Or, did you actually use object[double, ndim=2] like in the bug report? (Did > me and Mark get around to propose deprecating this one on the list?) > > Dag > > _______________________________________________ > cython-devel mailing list > cython-devel@python.org > http://mail.python.org/mailman/listinfo/cython-devel _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
