Re: [Numpy-discussion] Latest Array-Interface PEP

Travis,

First, thanks for doing this -- Python really needs it!

While this approach works, it requires attribute lookups which can be expensive when sharing many small arrays.

Ah, I do like reducing that overhead -- I know I use arrays a lot for small data sets too, so that overhead can be significant.

I'm not well qualified to review the tech details, but to make sure I have this right:

static PyObject* bf_getarrayview (PyObject *obj)

This function must return a new reference to a PyArrViewObject
which contains the details of the array information exposed by the
object.  If failure occurs, then NULL is returned and an exception 
set.  

So If I have some C code that wants to use any array passed in, I can just call:

bf_getarrayview (obj)

and if it doesn't return NULL, I have a valid array that I can query to see if it fits what I'm expecting.

Have I got that right?

If so, this would be great.

By the way,, how compatible is this with the existing buffer protocol?

-Chris