[Numpy-discussion] Getting an array interface and using it

Christopher Barker Chris.Barker@noaa....
Mon Nov 12 13:04:32 CST 2007

Matthieu Brucher wrote:
> I have an object that exposes an array interface. I want to modify the 
> data it contains, but using numpy.array(myObject) seems to copy the data 
> and thus my object is not modified. Am I mistaken or did I make a 
> mistake in my array interface ?

I think numpy.array(object) always makes a copy.

You want numpy.asarray(object) which will make a view if object exposes 
the array interface and matches the type and sizes requested.


Christopher Barker, Ph.D.

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