[Numpy-discussion] numpy.filled, again

Robert Kern robert.kern@gmail....
Fri Jun 14 12:21:42 CDT 2013


On Fri, Jun 14, 2013 at 6:18 PM, Eric Firing <efiring@hawaii.edu> wrote:
> On 2013/06/14 5:15 AM, Alan G Isaac wrote:
>> On 6/14/2013 9:27 AM, Aldcroft, Thomas wrote:
>>> If I just saw np.values(..) in some code I would never guess what it is doing from the name
>>
>> That suggests np.fromvalues.
>> But more important than the name I think
>> is allowing broadcasting of the values,
>> based on NumPy's broadcasting rules.
>> Broadcasting a scalar is then a special case,
>> even if it is the case that has dominated this thread.
>
> True, but this looks to me like mission creep.  All of this fuss is
> about replacing two lines of user code with a single line.  If it can't
> be kept simple, both in implementation and in documentation, it
> shouldn't be done at all.  I'm not necessarily opposed to your
> suggestion, but I'm skeptical.

It's another two-liner:

[~]
|1> x = np.empty([3,4,5])

[~]
|2> x[...] = np.arange(5)

[~]
|3> x
array([[[ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.]],

       [[ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.]],

       [[ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.],
        [ 0.,  1.,  2.,  3.,  4.]]])

It's wafer-thin!

--
Robert Kern


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