[Numpy-discussion] ctypes and numpy

Zachary Pincus zachary.pincus@yale....
Sat Nov 7 11:36:13 CST 2009


Check out this thread:
http://www.mail-archive.com/numpy-discussion@lists.sourceforge.net/msg01154.html

In shot, it can be done, but it can be tricky to make sure you don't  
leak memory. A better option if possible is to pre-allocate the array  
with numpy and pass that buffer into the C code -- but that's not  
always possible...

Zach


On Nov 6, 2009, at 10:18 PM, Chris Colbert wrote:

> Are you bound to using ctypes as the only option?
>
> This could be done quite easily in Cython...
>
> On Fri, Nov 6, 2009 at 1:57 PM, Trevor Clarke <trevor@notcows.com>  
> wrote:
>> I've found some info on ctypes and numpy but it mostly tells me how  
>> to pass
>> numpy objects to C funcs. I've got a C func which returns a  
>> c_void_p to a
>> buffer and I'd like to access the data using numpy without creating  
>> a copy
>> of the data. Could someone point me in the right direction?
>>
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