Dynamic runtimes and the Python object model
Scopes, closures, and metaprogramming decorators
Lexical scoping rules (LEGB), closure environments, free variable capture, decorator wrapping, and parameterized function transforms.
Not yet
This one opens once you have finished Polymorphism, vtables, and generic containers in C++.
Progress is kept against your account, so finishing a module needs one. Everything up to here is open without.