What is mypy and how does it work with type hints in Python?

What is mypy and how does it work with type hints in Python?

Mypy is a static type checker for Python that checks type hints in your code. It helps catch type errors before runtime.

How do I add type hints to my Python functions?

You can add type hints by specifying the expected types of function parameters and return values using the syntax: def function_name(param: Type) -> ReturnType.

Can you give me an example of a function with type hints?

Sure! Here's an example:

def add(a: int, b: int) -> int: return a + b

This function takes two integers and returns their sum.

What happens if I don't use type hints?

If you don't use type hints, Python will still run your code, but you may encounter runtime errors that could have been caught earlier with type checking.