[Python-Dev] FunctionDef.returns - explicit 'None' return type hint

[Valentin Iovene]

With a ast.FunctionDef ast.AST node, is it possible to make the
difference between this function

    def hello_world():
        print('hello world')

and this one

    def hello_world() -> None:
        print('hello world')

?

In both cases, the FunctionDef node has its 'returns' (return type
hint) attribute set to None.

-- 
Valentin