What are function parameter annotations in Python?

What are function parameter annotations in Python?

Function parameter annotations in Python are a way to attach metadata to function parameters, indicating their expected types.

Can you give me an example of how to use them?

Sure! Here's a simple example:

def greet(name: str) -> str: return f'Hello, {name}!'

In this case, 'name' is annotated to be of type 'str'.

Are these annotations enforced by Python?

No, they are not enforced. They are mainly for documentation purposes and can be used by type checkers.

How can I check if my function parameters are correct?

You can use type checkers like mypy or IDEs that support type checking to verify if your function parameters match the annotations.