[Numpy-discussion] Suppressing "nesting" (recursion, descent) in array construction.
Francesc Altet
faltet at carabos.com
Thu Jun 21 03:43:52 EDT 2007
El dc 20 de 06 del 2007 a les 12:43 -0700, en/na Michael McNeil Forbes
va escriure:
> Hi,
>
> That is a little more complicated than I want, but it shows me the
> solution: Construct the array of the desired shape first, then fill it.
>
> data = [1.0, 3,0]
> keys = [('a',1),('b',2)]
>
> # Convert to arrays for indexing
> data_array = array(data1)
> key_array = empty(len(keys),dtype=tuple)
> key_array[:] = keys[:]
the later two statements can also be written as:
key_array = array(keys, dtype=tuple)
> inds = argsort(data)
> data_array[:] = data[inds]
> key_array[:] = keys[inds]
Yeah, much simpler than my first approach.
Cheers,
--
Francesc Altet | Be careful about using the following code --
Carabos Coop. V. | I've only proven that it works,
www.carabos.com | I haven't tested it. -- Donald Knuth
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