Passing Python list to C++ vector using Boost.python

Question

How do I pass a Python list of my object type ClassName to a C++ function that accepts a vector?

The best I found is something

Answer 1

Assuming you have function that takes a std::vector

void bar (std::vector arg)

The easiest way to handle this is to expose the vector to python.

BOOST_PYTHON_MODULE(awesome_module)
{
    class_("Foo")
        //methods and attrs here
    ;

    class_ >("VectorOfFoo")
        .def(vector_indexing_suite >() )
    ;

    .def("bar", &bar)
}

So now in python we can stick Foos into a vector and pass the vector to bar

from awesome_module import *
foo_vector = VectorOfFoo()
foo_vector.extend(Foo(arg) for arg in arglist)
bar(foo_vector)