[Numpy-discussion] Numpy array from ctypes pointer object?
mark at mitre.org
Wed Jul 12 14:06:14 CDT 2006
Travis Oliphant wrote:
> Mark Heslep wrote:
>> I don't see a clean way to create a numpy array from a ctypes pointer
>> object. Is the __array_interface_ in ctypes the thing thats missing
>> needed to make this happen? I've followed Albert's Scipy cookbook
>> on ctypes here
>> On the C side the PyArray_SimpleNewFromData( ..dimensions, ...data
>> ptr) C API does the job nicely. Is there a ctypes paradigm for
> Can you somehow call this function using ctypes?
That might work, though indirectly. As I think I understand from ctypes
docs: Ctypes uses functions exposed in a shared library, macros
existing only a header are not available. If its PyArray... is a macro
then I a) need to compile and make a little library directly from
arrayobject.h or b) need to use the root function upon which the macro
is based, PyArrayNew?
ctypes has built-in access to the functions in the core python library,
but Im not sure which library contains all the PyArray API calls, since
its all typically hidden by distutils and setup.py
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