You have to write
   class_<A>  ("A",init<int>())
     .add_property("d",&A::getd)
     .add_property("pb",make_getter(&A::pb,
return_internal_reference<1> ()));

check the docs for make_getter. 

Jaleco wrote:
>  
>  Dear all
>  
>          I am trying use boost.python to export freetype library to python.
>  But I encounter pointer problem.boost  don't know pointer.
>  How do I export class pointer to python ?
>  
>  / Includes
>  ====================================================================
>  #include ?boost/python.hpp?
>  
>  class  B
>  {
>    public :
>     int d ;
>  
>  };
>  class A
>  {
>    public :
>      A(int d) { pb = new(B);pb-?d = d ;} ;
>      int getd(void) { return pb-?d;} ;
>      B *pb ;
>  };
>  
>  // Using
>  =======================================================================
>  using namespace boost::python;
>  
>  // Module
>  ======================================================================
>  BOOST_PYTHON_MODULE(ft2)
>  {
>    class_?A? ("A",init?int?())
>      .add_property("d",?A::getd)
>      .def_readonly("pb",?A::pb);
>    class_?B? ("B")
>      .def_readwrite("d",?B::d)  ;
>  
>  }
>  
>  C:\source\boost_1_30_0\libs\python\ft2?python
>  Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
>  Type "help", "copyright", "credits" or "license" for more information.
>  ??? import ft2
>  ??? a = ft2.A(1)
>  ??? pb = a.pb
>  Traceback (most recent call last):
>    File "?stdin?", line 1, in ?
>  TypeError: No to_python (by-value) converter found for C++ type: class B *
>  ???
>  
>  another question is , I try to add
>  BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(B) ;  to
>  my source source code, This problem is gone.
>  But the answer is wrong .................
>  
>  // Includes
>  ====================================================================
>  #include ?boost/python.hpp?
>  
>  class  B
>  {
>    public :
>     int d ;
>  
>  };
>  class A
>  {
>    public :
>      A(int d) { pb = new(B);pb-?d = d ;} ;
>      int getd(void) { return pb-?d;} ;
>      B *pb ;
>  };
>  BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(B) ;
>  // Using
>  =======================================================================
>  using namespace boost::python;
>  
>  // Module
>  ======================================================================
>  BOOST_PYTHON_MODULE(ft2)
>  {
>    class_?A? ("A",init?int?())
>      .add_property("d",?A::getd)
>      .def_readonly("pb",?A::pb);
>    class_?B? ("B")
>      .def_readwrite("d",?B::d)  ;
>  
>  }
>  
>  Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
>  Type "help", "copyright", "credits" or "license" for more information.
>  ??? import ft2
>  ??? a = ft2.A(1)
>  ??? pb=a.pb
>  ??? pb
>  ?ft2.B object at 0x009082C8?
>  ??? pb.d
>  10445536
>  ??? a.d
>  1
>  ???


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