[Numpy-discussion] Anyone have a well-tested SWIG-based C++ STL valarray <=> numpy.array typemap to share?
Thu Sep 6 17:10:15 CDT 2007
Xavier Gnata wrote:
> I'm using the numpy C API (PyArray_SimpleNewFromData) to perform the
> conversion but my code is written by hands.
I'd like to see that. How are you getting the pointer to pass in to
PyArray_SimpleNewFromData? It looks like you can do something like:
(VA is a valarray<double>)
dims = VA.size()
NPA = PyArray_SimpleNewFromData(1, dims, typenum, &VA);
Is that what you're doing? Is there any guarantee that &VA won't
change? In any case, I assume that you have to make sure that VA doesn't
get deleted while the array is still around.
> I would like to simplify it using SWIG but I also would like to see a good typemap valarray <=>
> numpy.array :)
In principle, if you know how to write the code by hand, you know how to
write the typemap.
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