I want to create a Python interface for "boost::numeric::ublas::vector<TReal>" where TReal is a C++ class for numbers. How can I add my constructor (to create a vector from a python list) to the python interface for "ublas::vector"? The following approach: class_<CVector>("vector") .def(init<size_t>()) .def(init<list>()) .def("__getitem__", &vector_get_item) .def("__setitem__", &vector_set_item) .def("resize", &CVector::resize) .def("size", &CVector::size); where class CVector: public ublas::vector<TReal> { public: ... CVector(const list &l) { ... } }; doesn't works. The python program exits with the following message Boost.Python.ArgumentError: Python argument types in some_function(some_class, vector) did not match C++ signature: some_function(..., boost::numeric::ublas::vector<...>) I think that boost doesn't understand that "CVector" is practically "ublas::vector<TReal>". Inheriting "CVector" from "wrapper<ublas::vector<TReal> >" solves this problem. But I need to add "boost::noncopyable" to "class_<CVector>" while I want to use a function that returns "ublas::vector<TReal>" in python. Is it possible not to add "boost::noncopyable" in such case? Numpy bindings are not appropriate because I use "ublas::vector" with custom type for real numbers.