[C++-sig] Trouble destructor, call python's object with pointer in boost.python

[simon zhang]

when I call python's function with pointer as an argument in boost.python,
there are some troubles in destructor. The following is a sample code

#include <boost/python.hpp>#include <boost/python/module.hpp>#include
<boost/python/def.hpp>#include <string>#include <iostream>using
namespace boost::python;
class A {public:
    A() {
        std::cout<< "A start"<<std::endl;
    }
    ~A() {std::cout<< "A end" <<std::endl;}}class B {public:
    B() { aa=new A; }
    ~B() { delete aa; }
    void run(object ct) {
        _obj=ct();              //creat a python object
        _obj.attr("fun1")(aa);  //call a function named "fun1" with a
pointer arg
        _obj.attr("fun2")(aa);  //call a function named "fun2" with a
pointer arg
    }
    A *aa;
    object _obj;}

BOOST_PYTHON_MODULE(ctopy){
    class_<A> ("A",init<>())
    ;
    class_<b> ("B",init<>())
    .def("run",&B::run)
    ;}


python:

import ctopyclass tc:
    def fun1(self,tt):
        print "fun1"
    def fun2(self,tt):
        print "fun2"
bb=ctopy.D()
bb.run(tc)

this result:

A start
fun1
A end
fun2
A end
A end

note:

The "A end" has been printed three.I try it in "valgrind"，there are some
errors.I just want to run the destructor once.How to do?

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