[Numpy-discussion] Slice specified axis

Benjamin Root ben.root@ou....
Mon Apr 9 11:22:32 CDT 2012


On Mon, Apr 9, 2012 at 12:14 PM, Jonathan T. Niehof <jniehof@lanl.gov>wrote:

> On 04/06/2012 06:54 AM, Benjamin Root wrote:
>
> > Take a peek at how np.gradient() does it. It creates a list of None with
> > a length equal to the number of dimensions, and then inserts a slice
> > object in the appropriate spot in the list.
>
> List of slice(None), correct? At least that's what I see in the source,
> and:
>
>  >>> a = numpy.array([[1,2],[3,4]])
>  >>> operator.getitem(a, (None, slice(1, 2)))
> array([[[3, 4]]])
>  >>> operator.getitem(a, (slice(None), slice(1, 2)))
> array([[2],
>        [4]])
>
>
Correct, sorry, I was working from memory.

Ben Root
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