What are type hints in Python and how do I use them?

What are type hints in Python and how do I use them?

Type hints in Python are a way to indicate the expected data types of variables, function parameters, and return values. They help with code readability and can assist tools like linters and IDEs in catching errors.

Can you give me an example of how to use type hints in a function?

Sure! Here's a simple example:

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

In this function, a and b are expected to be integers, and the function returns an integer.

What happens if I don't use type hints?

If you don't use type hints, Python will still run your code without any issues. However, you may miss out on the benefits of improved readability and error checking during development.

Are type hints mandatory in Python?

No, type hints are not mandatory in Python. They are optional and primarily serve to enhance code clarity and maintainability.