[Numpy-discussion] Passing a Null pointer after ndarray prototype definition

I have a problem in that I have a DLL function which accepts several numpy double arrays, but you need to pass a NULL pointer for the ones from which you do not require results. The prototype is as follows: T_ndDp = numpy.ctypeslib.ndpointer(dtype=float, ndim=1, flags='C_CONTIGUOUS')

[Numpy-discussion] random access iterators

I'm looking at writing some c++ code to interoperate with numpy. A c++ random access iterator must include a 'distance' function. distance (i1, i2) must return the number of times i1 has to be incremented to reach i2. Is there a way to get this from PyArrayIterObject?

Re: [Numpy-discussion] how do I list all combinations

On Wed, 26 Dec 2007, Mathew Yeates apparently wrote: r1=[dog,cat] r2=[1,2] I want to return [[dog,1],[dog,2],[cat,1],[cat,2]] This is a Cartesian product. Sage has ``cartesian_product_iterator`` for this. Also

Re: [Numpy-discussion] random access iterators

Neal Becker wrote: I'm looking at writing some c++ code to interoperate with numpy. A c++ random access iterator must include a 'distance' function. distance (i1, i2) must return the number of times i1 has to be incremented to reach i2. Is there a way to get this from PyArrayIterObject?