moda.cpp

#include "moda.h"

#include <pybind11/pybind11.h>
#include <pybind11/stl_bind.h>

namespace py = pybind11;

PYBIND11_MODULE(moda, m) {
	py::class_<A, std::shared_ptr<A>>(m, "A")
		;

	py::bind_vector<AList>(m, "AList");

	m.def("get_list", []() {
			AList lst;
			P_A p_a;
			lst.push_back(p_a);
			return lst;
	});
}

moda.h

#include <memory>
#include <vector>

#include <pybind11/pybind11.h>

class A {
};

typedef std::shared_ptr<A> P_A;
typedef std::vector<P_A> AList;

PYBIND11_DECLARE_HOLDER_TYPE(T, std::shared_ptr<T>);
PYBIND11_MAKE_OPAQUE(AList);

modb.cpp

#include <pybind11/pybind11.h>

#include "moda.h"

namespace py = pybind11;

PYBIND11_MODULE(modb, m) {
	py::module::import("moda");

	m.def("get_list", []() {
		AList lst;
		P_A p_a(new A());
		lst.push_back(p_a);
		return lst;
	});
}