从std :: function创建boost :: python :: object

#include<iostream>
#include<functional>
#include<boost/python.hpp>

int main(int argc, char *argv[]) {
    Py_Initialize();
    try {
        boost::python::object main_module = boost::python::import("__main__");
        boost::python::object main_namespace = main_module.attr("__dict__");

        // 将Python代码作为字符串传递给Python解释器
        std::string python_code = R"(
def add(a, b):
    return a + b
)";
        boost::python::exec(python_code.c_str(), main_namespace);

        // 从Python函数创建boost::python::object
        boost::python::object python_function = main_namespace["add"];

        // 将std::function绑定到Python函数
        std::function<int(int, int)> add = boost::python::extract<std::function<int(int, int)>>(python_function);

        // 使用std::function调用Python函数
        int result = add(3, 4);
        std::cout << "Result: "<< result<< std::endl;

    } catch (boost::python::error_already_set &e) {
        std::cerr << "Error: " << e.what()<< std::endl;
    }

    Py_Finalize();
    return 0;
}

g++ -std=c++11 -o example example.cpp -lboost_python -lpython3.8
./example

Result: 7