defines boost::python function which returns new object

new_object.cpp

#include <boost/python/manage_new_object.hpp>
#include <boost/python/return_value_policy.hpp>

some_object* some_function() {
    return new some_object();
}

.def("some_function", some_function, boost::python::return_value_policy<boost::python::manage_new_object>(),