Re: [Boost-users] [boost-users][python]

1 May 2009

      I found the line of code that makes this error occur. It is when trying
to push my object into the container.

¿Anyone knows why?

2009/5/1 Germán Diago :
...
I have a question about managing python objects.
I have a base class implemented in c++, which I use in python.
From python I inherit that class. And the I try to use the python
instance from c++, like this.
//This class has a function which is registered in python. I want to
//be able to register python instances with this class
class AnotherClass {
  void registerobject(const std::string & name, MyBaseClass * a)
  {
     v.push_back(a);
  }
};
//Interface class, which I inherit in python
class MyBaseClass {
  virtual const std::string getData(Object * o) const = 0;
};
From python:
class MyPyClass(MyBaseClass):
   def __init__(self):
        MyBaseClass.__init__(self)
   def getData(self, o):
       return "hello"
My question is. In order to register  that class, namely,
MyPyClass(which is a python class):
can I do it through registerobject?
Or should I implement something like this?:
class AnotherClass {
  void registerobject(const std::string & name, python::object & o)
 {
      MyBaseClass * m = extract<MyBaseClass>(o);
      v.push_back(m);
  }
};
In all two cases I get error_already_set exception when I try to execute the
registerobject function and don't know why.