Tony Djordjevski wrote:

Hi everyone,

I'm fairly new to Boost.Python and I'm trying to set a return value policy for a class property. I'm using VC7.1 with Boost 1.31.0.

A simplified example of what I'm trying to do is:

// Node class definition class Node { private: Node *parent;

public: Node(); ~Node();

Node* getParent(); void setParent(Node *newParent); };

// The following works fine, but not what I'm looking for BOOST_PYTHON_MODULE(MyModule) { class_< Node >("Node", init< >()) .def(init< const Node& >()) .def("getParent", &Node::getParent, return_value_policy< reference_existing_object >()) .def("setParent", &Node::setParent) ; }

What I'd really like to do is something like this:

BOOST_PYTHON_MODULE(MyModule) { class_< Node >("Node", init< >()) .def(init< const Node& >()) .add_property("parent", &Node::getParent, return_value_policy< reference_existing_object >(), &Node::setParent)

You have to do this instead: .add_property("parent" , make_function(&Node::getParent, return_value_policy< reference_existing_object >()) , &Node::setParent );

}

Is something like this possible? The compiler complains that I'm passing in the wrong amount of arguments and after looking at the source for class.hpp, I'm led to believe that it's currently not possible. So I guess my question really is "Is there an easy way around this?".

On a side note: I realize that Pyste doesn't support the add_property feature. I don't have a lot of time, but I'd like to take a crack at adding it. If someone could point me in the right direction, I'd appreciate it.

Thanks, Tony Djordjevski

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