I have a C++/Pybind11 function that receives a Python package foo as argument.

My package is just a directory named ‘foo’ with two files in it:

foo
 + __init__.py
 + bar.py

The bar.py just contains some variables, such as test. In the C++ function I need to access the module bar within that package.
From Python this is easily done with from foo import bar and in fact this works correctly as I tested it using the following Python code):

from foo import bar

print(bar.test)

This works correctly. I read that in Pybind11 to access a module within a package I should use the attr method but this doesn’t seem to work as I always get an error
saying that the bar attribute does not exist. This is the C++ code:

void Engine::start(py::module& foo) {

    try {
        py::module settings = foo.attr("bar");
        std::cout << "okn";
    } catch (py::error_already_set& e) {
        std::cout << "errorn";
        PyErr_Print();
    } 

Needless to say, ok is never printed and I always end up in the error branch. Now my question is: is there a way to access a module within a package from C++? If so, how should it be done?