Python 3.6 has typing/type annotations. It's opt in but seems to work fairly sanely. https://medium.com/@ageitgey/learn-how-to-use-static-type-checking-in-pyth

Python 3.6 has typing/type annotations. It's opt in but seems to work fairly sanely. https://medium.com/@ageitgey/learn-how-to-use-static-type-checking-in-python-3-6-in-10-minutes-12c86d72677b https://medium.com/@ageitgey/learn-how-to-use-static-type-ch...