What are type hints in third-party libraries?

What are type hints in third-party libraries?

Type hints are a way to indicate the expected data types of function arguments and return values in Python. They help improve code readability and enable better static type checking.

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

Sure! Here's a simple example:

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

In this function, name is expected to be a string, and the function returns a string.

Are there any third-party libraries that support type hints?

Yes, many libraries support type hints, including popular ones like NumPy, Pandas, and FastAPI. They provide type annotations to enhance code quality.

How do type hints improve code quality?

Type hints improve code quality by making the code more understandable, enabling better IDE support, and allowing tools like mypy to catch type errors before runtime.