[Numpy-discussion] how to get data out of an object array in pyrex?
jswhit at fastmail.fm
Mon Feb 6 05:01:09 CST 2006
Travis Oliphant wrote:
> Jeff Whitaker wrote:
>> Hi: I've successfully used the examples at
>> http://www.scipy.org/Wiki/Cookbook/Pyrex_and_NumPy to access the data
>> in a 'normal' numpy array, but have had no success adapting these
>> examples to work with object arrays. I understand that the .data
>> attribute holds pointers to the objects which actually contain the
>> data in an object array, but how to you use those pointers to get the
>> data in C/pyrex?
> You have a pointer to a PyObject *object in the data. Thus, data
> should be recast to PyObject **. I don't know how to do that in PyRex.
Apparently not. If I try to do this pyrex says
115:25: Pointer base type cannot be a Python object
> But, it's easy in C.
> In C, you will need to be concerned about reference counts.
OK, I was hoping to avoid hand-coding an extension in C (which I'm
woefully unqualified to do).
Jeffrey S. Whitaker Phone : (303)497-6313
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