numpy-discussion

[Numpy-discussion] Changing byte ordering with astype fails with 0d arrays

[Matthew B. <mat...@gm...>]

Hi,

As expected:

In [67]:a = array([1], dtype='<i4')

In [68]:a.astype('>i4').dtype
Out[68]:dtype('>i4')

I was also expecting this to work for 0d arrays, but it doesn't:

In [69]:a = array(1, dtype='<i4')

In [70]:a.astype('>i4').dtype
Out[70]:dtype('<i4')

Is this as intended?

Thanks a lot,

Matthew

Re: [Numpy-discussion] Changing byte ordering with astype fails with 0d arrays

[Travis O. <oli...@ie...>]

Matthew Brett wrote:
> Hi,
>
> As expected:
>
> In [67]:a = array([1], dtype='<i4')
>
> In [68]:a.astype('>i4').dtype
> Out[68]:dtype('>i4')
>
> I was also expecting this to work for 0d arrays, but it doesn't:
>
> In [69]:a = array(1, dtype='<i4')
>
> In [70]:a.astype('>i4').dtype
> Out[70]:dtype('<i4')
>
>   
The problem is that the astype method is returning an array scalar (it 
used to be that 0-d arrays were "avoided" at all costs).  We've since 
relaxes this requirement and I think here's another place where it needs 
to be relaxed. 

-Travis