One of the new features in python 3.5 is type hinting inspired from this project.
typing: PEP 484 – Type Hints.
I want to test
See the fifth paragraph of the abstract in the PEP you link to:
While these annotations are available at runtime through the usual
__annotations__attribute, no type checking happens at runtime . Instead, the proposal assumes the existence of a separate off-line type checker which users can run over their source code voluntarily