Re: [Numpy-discussion] Multiple inheritance from ndarray

[Stefan v. d. W. <st...@su...>]

On Wed, Feb 22, 2006 at 08:58:28PM -0700, Travis Oliphant wrote:
> Here's an outline of what you need to do.  This is, of course,=20
> untested....  For example, I don't really know what actImage is.
>=20
> from numpy import ndarray, array
>=20
> class Image(ndarray, actImage):
>    def __new__(subtype, *args)
>        act1 =3D actImage.__new__(actImage, *args)
>        actImage.__init__(act1, *args)
>        arr =3D array(act1.getArray(), 'd', copy=3DFalse)
>        self =3D arr.view(subtype)
>        # you might need to copy attributes from act1 over to self here.=
..
>        return self

This is probably the right place to use super, i.e.:

def __new__(subtype, *args):
	act1 =3D super(Image, subtype).__new__(subtype, *args)
	...

def __init__(self, *args):
	super(Image, self).__init__(*args)

The attached script shows how multiple inheritance runs through
different classes.

St=E9fan