Matthew Brett wrote:
> Hi,
>
>
>> This is a result of PyArray_FromAny changing when object arrays are
>> explicitly requested (which they are in this case --- although behind
>> the scenes).
>>
>
> Hmm - I think I am hitting a related bug/feature/surprising change in
> behavior, which is showing up rather obscurely in a failure of the
> scipy.io matlab loading tests:
>
> http://projects.scipy.org/scipy/scipy/ticket/258
>
> Here's the change I wasn't expecting, present with current SVN:
>
> a = arange(2)
> b = arange(1)
> c = array([a, b], dtype=object)
> c
> ->
> array([[0, 1],
> [0, 0]], dtype=object)
>
> On a previous version of numpy (1.02b.dev2975) I get the answer I was expecting:
>
> array([[0], [0 1]], dtype=object)
>
This should now be fixed. The code was inappropriately not checking for
dimensions when object arrays were being constructed. Now, it raises
the appropriate error and then interprets it correctly using the extra
object creation code.
Users of scipy 0.5.1 will only have to upgrade NumPy to get the fix (the
SciPy install won't have to be re-built).
-Travis
Where is array at this point? I would like to review the documented behaviour and make modifications to the document string if required. What about Robert's idea of a separate constructor for object arrays? Is it something we could introduce on top of the current array constructor? I realize that if we restrict the current array constructor there might be compatibility problems with Numeric code, but introducing something like oarray as a shorthand for object arrays might incourage it's use. Robert also said that Numarray dealt with object arrays as a separate issue and I wonder what they did that we should think about.
Chuck
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