boost::python: Python list to std::vector

Question

Finally I\'m able to use std::vector in python using the [] operator. The trick is to simple provide a container in the boost C++ wrapper which handles the internal vector s

Answer 1

Based on the above answers I created an example of accessing python lists in C++ as well as returning a python list from a C++ function:

#include 
#include 

namespace py = boost::python;

// dummy class
class drow{
    public:
        std::string word;
        drow(py::list words);
        py::list get_chars();
};

// example of passing python list as argument (to constructor)
drow::drow(py::list l){
    std::string w;
    std::string token;
    for (int i = 0; i < len(l) ; i++){
        token = py::extract(l[i]);
        w += token;
    }
    this -> word = w;
}

// example of returning a python list
py::list drow::get_chars(){
    py::list char_vec;
    for (auto c : word){
        char_vec.append(c);
    }
    return char_vec;
}

// binding with python
BOOST_PYTHON_MODULE(drow){
    py::class_("drow", py::init())
        .def("get_chars", &drow::get_chars);
}

For a build example and a test python script take a look here

Thank you Arlaharen & rdesgroppes for the pointers (pun not intended).