Hi, I would like to custom __getattr__ for my class such that for some attributes, an internal reference is returned, and for others, a new object is returned. I cannot hardcode the attributes as they are dynamic. I started writing something like: boost::python::object myGetAttr(boost::python::object obj, std::string const& attr) { MyObj* mobj = boost::python::extract(obj)(); if (attr == "internal_ref") { MyRef* refObj = mobj->getInternalRef(); // how do I return this? } else { MyValueObj obj = mobj->getValueObj(); // how do I return this? } } class_ ("MyObj", no_init) .def ("__getattr__", &myGetAttr, ???what_should_I_put_here???) ; However, I am not able to get this to work. Any suggestions? Regards, Krishnan