> This is a Python specific problem caused by everything being boxed by default and the interpreter does not even know what's in the box until it dereferences it

That's not the whole thing, what is going on. Every attribute access is a function call to __getattr__, that can return whatever object it wants.

bar.foo (...) is actually bar.__getattr__ ('foo') (bar, ...)

This dynamism is what makes Python Python and it allows you to wrap domain state in interface structure.