[C++-sig] return object from factory function

[Gennadiy Rozental]

David Abrahams <dave <at> boostpro.com> writes:
> Unfortunately I don't understand what you're doing well enough yet to be
> able to advise.

Let me try again. Here is my create function implementation:

Base*
Factory::create( .... )
{
 ....
case python_object:
   boost::python::object obj = m_python_type();

   return boost::python::extract<PythonBase*>( obj )();
}

As you can see obj is automatic variable, which gets destructed as we leave the
function create scope. Reference counter is decreased and underlying python
object is destroyed in turn. What I need is to prevent it, because I want to
return pointer to it from this function. It should work the same way as if I
would write 
new DerivedFromBase(...)

Gennadiy