cavok@filibusta.crema.unimi.it writes:

hi,

i'd like to do something like this:

-------------- CUT HERE -------------- #include using namespace boost::python;

struct A { void f() { /* do something */ } };

A a;

BOOST_PYTHON_MODULE(hello) { class_<A>("A") .def("f", &A::f) ;

def_readwrite("a", a); } -------------- CUT HERE --------------

i don't see how to do it with boost.

any hint for a poor newbie?

You can't make a writable module-scope variable because modules don't support anything like properties or __setattr__ methods. Consider how you would do a similar thing in Python, keeping in mind that when you assign into a you need to have a function invoked which writes into the C++ variable. If you look around (see the Python cookbook on http://www.aspn.com, ferinstance) I think you can find a trick by Alex Martelli which lets you spoof a module with a class. HTH. P.S. Boost.Python questions to the C++-sig, please: http://www.boost.org/mailing_lists.htm#cplussig -- Dave Abrahams Boost Consulting www.boost-consulting.com