[Numpy-discussion] PyArray_DIMS problem

Sebastian Haase haase at msg.ucsf.edu
Wed Dec 20 21:43:28 CST 2006


On 12/20/06, Gennan Chen <gnchen at mac.com> wrote:

>  Hi!
>
>
> I have problem with this function call under FC6 X86_64 for my own numpy
> extension
>
>
> printf("\n %d %d %d",
> PyArray_DIM(imgi,0),PyArray_DIM(imgi,1),PyArray_DIM(imgi,2))
>
>
> it gave me
>
>
> 166 256 256
>
>
> if I tried:
>
>
> int *dim;
> dim = PyArray_DIMS(imgi)
> printf("\n %d %d %d", dim[0], dim[1], dim[2]);
>
>
> it gave me 166 0 256
>


Hi -
maybe I'm dense here -
but how is this /supposed/ to work ? Is PyArray_DIMS allocating some memory
that never gets freed !?
 I thought "tuples" in C had to always be passed into a function, so that
that function could modify it, as in:

const int maxNDim = 20;
int dim[maxNDim];
PyArray_DIMS(imgi,  dim);


 What am I missing ... ?
-Sebastian
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