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;
}
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