[Numpy-discussion] PyArray_FROM_OF from Cython

David Warde-Farley dwf@cs.toronto....
Thu Oct 8 19:32:14 CDT 2009


On 8-Oct-09, at 6:47 PM, Robert Kern wrote:

> On Thu, Oct 8, 2009 at 17:28, David Warde-Farley  
> <dwf@cs.toronto.edu> wrote:
>> I'm trying to use PyArray_FROM_OF from Cython and the generated C  
>> code
>> keeps crashing.  Dag said on the Cython list that he wasn't sure what
>> was going on, so maybe someone here will have an idea.
>
> You must call import_array() at the top level before you can use any
> numpy C API functions.
>
> http://wiki.cython.org/tutorials/numpy#UsingtheNumpyCAPI

Thanks. One more thing: calling Py_DECREF on arrays that I have  
acquired from PyArray_FROM_OF seems to cause crashes, am I correct in  
assuming that Cython is somehow tracking all the PyObjects in the  
scope (even ones acquired via the NumPy C API) and DECREF'ing it for me?

David


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