Type hints communicate intents. They can be used for many things. Django-Ninja use them to do dependency injection and generate schemas for your API (using pyd

Type hints communicate intents. They can be used for many things. Django-Ninja use them to do dependency injection and generate schemas for your API (using pydantic). autodoc use them to generate the documentation of your function. etc... It does not replace duck typing, proof here: https://peps.python.org/pep-0544/ https://peps.python.org/pep-0544/