[Numpy-discussion] Is numpy supposed to support the buffer protocol?
oliphant.travis at ieee.org
Mon Aug 28 18:32:20 CDT 2006
Christopher Barker wrote:
> HI all,
> line 2814, in SetDataBuffer
> return _core_.Image_SetDataBuffer(*args, **kwargs)
> TypeError: non-character array cannot be interpreted as character buffer
> If I try to pass in a numpy array, while it works great with a
> numarray array.
This error sounds like wx is using the *wrong* buffer protocol. Don't
use bf_getcharbuffer as it is of uncertain utility. It is slated for
removal from Python 3000. It was meant to be used as a way to determine
buffers that were supposed to contain characters (not arbitrary data).
Just use bf_getreadbuffer and bf_getwritebuffer from tp_as_buffer.
More support for the buffer protocol all the way around is a good idea.
NumPy has always supported it very well (just make sure to use it
correctly). FYI, I'm going to write a PEP to get the array protocol
placed as an add-on to the buffer protocol for Python 2.6
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