[Cython] 2d buffer interface with aligned data

[Nathaniel Smith]

On Tue, Jul 17, 2012 at 9:55 PM, Christian Heimes <lists at cheimes.de> wrote:
> Am 17.07.2012 18:55, schrieb Dag Sverre Seljebotn:
>> Read PEP 3118. Then implement __getbuffer__ and __releasebuffer__ in
>> your cdef class (don't know if it's documented but you can see example
>> in tests/run/buffer.pyx).
>
> The new buffer interface from PEP 3118 is only available for Python 2.6
> and newer. I was hoping for some abstraction layer in Cython. Well, I
> don't have to support Python 2.5 and older. Thanks for the hint!

If you're worried about supporting older Python versions then the
simplest thing is probably to just implement the __array_interface__
or __array_struct__ interface. They're pretty trivial, and while not
as standards-compliant and Correct as PEP3118, they'll work just fine
with numpy across any version of Python. (Of course you can also
implement both PEP3118 and __array_struct__ together.)

http://docs.scipy.org/doc/numpy/reference/arrays.interface.html

-n