C++ Python convert data from vector to ndarray

Question

I am creating a C++ project which includes some python. I have used boost::python but now I am stuck. I have some data stored in a std::vector . The data should be send to python to do some calculations. The Python NumPy functions I use need the data in ndarray format, so I need a way to convert it. Since I want to do some more things with the results in C++ I want to convert the result back from ndarray to std::vector .

How can I convert std::vector to ndarray and vice versa? Can anyone post some sample code? I know there is a lib called boost.numpy out there, but are there other ways, because I was not able to build this lib...

Can I use boost::python::numeric for the job? Can anyone provide sample code?

Is it possible without copying data?

Answer 1

Maybe you are willing to use the C Numpy API .

You should look at C/C++ PyArray_SimpleNewFromData to create brand new ndarray in your c++ code.

This post may help.