mypy - Optional Static Typing for Python:

• https://mypy-lang.org/

• https://github.com/python/mypy

• Python with type hints and Mypy: regret for not using statically typed lang? https://old.reddit.com/r/Python/comments/1hzk4vb/python_with_type_hints_and_mypy_regret_for_not/

• Mypy is a waste of time: https://github.com/python/mypy/issues/11492