在boost.python/pyplusplus中包装int指针成员变量

Question

If I am using boost.python or pyplusplus, how do I wrap an int pointer, or any pointer that is a member variable of a class?

For example, how would I wrap x from the following class:

class Foo{
    int * x;
}

Answer 1

First you need to expose the class and properties to Python.

#include <boost/python.hpp>

BOOST_PYTHON_MODULE(mylib)
{
    using namespace boost::python;
    class_<Foo>("Foo")
        .def_readwrite("x", &Foo::x);
}

Invoking the class in Python is similarly simple.

>>> import mylib
>>> fooObj = mylib.Foo()
>>> fooObj.x = 3
>>> print 'fooObj.x is ', fooObj.x
fooObj.x is 3