[Numpy-discussion] Latest Array-Interface PEP
ndbecker2 at gmail.com
Fri Jan 5 09:38:49 EST 2007
Travis Oliphant wrote:
> Neal Becker wrote:
>> Travis Oliphant wrote:
>>> I'm attaching my latest extended buffer-protocol PEP that is trying to
>>> get the array interface into Python. Basically, it is a translation of
>>> the numpy header files into something as simple as possible that can
>>> still be used to describe a complicated block of memory to another user.
>>> My purpose is to get feedback and criticisms from this community before
>>> display before the larger Python community.
>> I'm wondering if having the buffer object specify the view is the right
>> choice. I think the best choice is to separate the design into:
>> buffer: provides an interface to memory
>> array: provides a view of memory as an array of whatever dimensions
>> 1. buffer may or may not map to contiguous memory.
>> 2. multiple views of the same memory can be shared. These different
>> views could represent different slicings.
> I don't understand your concerns, could you please help clarify?
> I'm not doing anything with the buffer object at all. I'm only using
> the buffer "protocol" (i.e. extending the set of function pointers
> pointed to by tp_as_buffer in the type-object).
Several extensions to Python utilize the buffer protocol to share
the location of a data-buffer that is really an N-dimensional
array. However, there is no standard way to exchange the
additional N-dimensional array information so that the data-buffer
is interpreted correctly.
I am questioning if this is the best concept. It says that the data-buffer
will carry the information about it's interpretation as an N-dimensional
I'm thinking that a buffer is just an interface to memory, and that the
interpretation as an array of n-dimensions, for example, is best left to
the application. I might want to at one time view the data as
n-dimensional, but at another time as 1-dimensional, for example.
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