The typing module was added to the standard library in Python 3.5 on a provisional basis and will no longer be provisional in Python 3.7. However, this means users of Python 3.5 - 3.6 who are unable ...

Experimenting with defining and validating types in Python. This repo sets some simple tasks to help you experiment and get started using function annotations (PEP 3107) and the typing module (PEP ...

Python’s typing module, used to annotate code with type information, lets you describe the types of a callable (e.g., a function). But that type information can’t be propagated across callables.