As illustrated when running the python file, the non qualified reads in
the `use` method all refer to the global variables, whereas `ex =
func(baz)` are to the things defined on the class.
The important part of the .expected changes is that the _global_
variable `bar` is used inside the function, whereas it's the local
variable for `foo` (on class scope) that is used inside the function
(which is wrong).