Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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Suppose that you want to add a function to a class, turning it into a member function:

    struct World
        void set(std::string msg) { this->msg = msg; }
        std::string msg;

    std::string greet(World& w)
        return w.msg;

Here, we want to make greet work as a member function of the class World. We do that using the add_method construct:

    W = Class("World", "hello.h")
    add_method(W, "greet")

Notice also that then you can rename it, set its policy, just like a regular member function:

    rename(W.greet, 'Greet')

Now from Python:

    >>> import hello
    >>> w = hello.World()
    >>> w.set('Ni')
    >>> w.greet()
    >>> print 'Oh no! The knights who say Ni!'
    Oh no! The knights who say Ni!