通过boost :: python :: ptr将对象指针传递给python。这将阻止python解释器进行复制：
#include <boost/python.hpp>#include <string>#include <iostream>using namespace boost::python;using namespace std;class World{private: string name;public: void set(string name) { this->name = name; } void greet() { cout << "hello, I am " << name << endl; }};typedef boost::shared_ptr< World > world_ptr;BOOST_PYTHON_MODULE(hello){ class_<World>("World") .def("greet", &World::greet) .def("set", &World::set) ;};int main(int argc, char **argv){ Py_Initialize(); try { PyRun_SimpleString( "class Person:n" " def sayHi(self):n" " print 'hello from python'n" " def greetReset(self, instance):n" " instance.set('Python')n" ); world_ptr worldObjectPtr (new World); worldObjectPtr->set("C++!"); inithello(); object o_main = object(handle<>(borrowed(Pyimport_AddModule("__main__")))); object o_person_type = o_main.attr("Person"); object o_person = o_person_type(); object o_func1 = o_person.attr("sayHi"); o_func1(); object o_func2 = o_person.attr("greetReset"); o_func2(boost::python::ptr(worldObjectPtr.get())); worldObjectPtr->greet(); } catch (error_already_set) { PyErr_Print(); } Py_Finalize(); return 0;}
