On Tue, Nov 17, 2009 at 12:33, Sebastian Haase <seb.ha...@gmail.com> wrote: > On Tue, Nov 17, 2009 at 5:40 PM, <josef.p...@gmail.com> wrote: >> On Tue, Nov 17, 2009 at 11:24 AM, Jean-Baptiste Rudant >> <boogalo...@yahoo.fr> wrote: >>> Hello, >>> I think there's something strange with shape when a slice is given by an >>> array. >>> import numpy as N >>> my_array = N.ones((2, 3, 6)) >>> ind = N.arange(4) >>> #you hope to find (3, 4) >>> print my_array[0, :, ind].shape >>> print my_array[0, :, 0:4].shape >>> print my_array[0][:, ind].shape >>> print my_array[0][:, 0:4].shape >>> """ >>> (4, 3) >>> (3, 4) >>> (3, 4) >>> (3, 4) >>> """ >>> Jean-Baptiste Rudant >> >> there was a long thread on this with the explanation in March, title >> "is it a bug?" >> > The thread is here: > http://www.mail-archive.com/numpy-discussion@scipy.org/msg16300.html > > It looks to me like violating the principle of "least surprise".
That "principle" is notoriously unreliable, and I am never convinced by it. > My reading of that thread is, that the observed "bug" is mostly a > consequence coming from the way fancy indexing is implemented. How > about deprecating this kind of index mixing !? No. When you need it, you need it. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
