str/bytes object from arr.data?

Hi, Anybody knows a way to get a str object (bytes for Python >= 2.6) out of a buffer object (i.e. the .data attribute of ndarrays) without copying data? I need this for avoid creating a new function that deals with buffer objects (instead of reusing the one for str/byte objects that I already have). So, a matter of laziness :-) Thanks, -- Francesc Alted

As str objects are supposed to be immutable, I think anything "official" that makes a string from a numpy array is supposed to copy the data. But I think you can use ctypes to wrap a pointer and a length as a python string. Zach On Sep 27, 2010, at 8:28 AM, Francesc Alted wrote:
Hi,
Anybody knows a way to get a str object (bytes for Python >= 2.6) out of a buffer object (i.e. the .data attribute of ndarrays) without copying data?
I need this for avoid creating a new function that deals with buffer objects (instead of reusing the one for str/byte objects that I already have). So, a matter of laziness :-)
Thanks,
-- Francesc Alted _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion

A Monday 27 September 2010 15:04:14 Zachary Pincus escrigué:
As str objects are supposed to be immutable, I think anything "official" that makes a string from a numpy array is supposed to copy the data. But I think you can use ctypes to wrap a pointer and a length as a python string.
Yeah, ctypes is very powerful indeed. Thanks! -- Francesc Alted
participants (2)
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Francesc Alted
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Zachary Pincus