[Numpy-discussion] numpy array to C API

Robert Kern robert.kern at gmail.com
Wed Mar 20 12:03:36 EDT 2013

On Wed, Mar 20, 2013 at 1:59 PM, Søren <sd at syntonetic.com> wrote:
> Greetings
> I'm extending our existing C/C++ software with Python/Numpy in order to do extra number crunching.
> It already works like a charm calling python with the C API <Python.h>.
> But what is the proper way of passing double arrays returned from Python/Numpy routines back to C?
> I came across PyArray but I can see in the compiler warnings, it is deprecated and I don't wanna start from scratch on legacy facilities.

What is this `PyArray` that you are referring to? There is nothing
named just `PyArray` to my knowledge. Do you mean direct access to the
`data` member of the PyArrayObject struct? Yes, that is deprecated.
Use the PyArray_DATA() macro to get a `void*` pointer to the start of
the data.


Robert Kern

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