What are the best practices for type hinting in Python?

What are the best practices for type hinting in Python?

Type hinting in Python enhances code readability and helps with static type checking. Best practices include using the Optional type for nullable values, specifying types for function parameters and return values, and using List, Dict, etc., from the typing module for collections.

Can you give me an example of type hinting in a function?

Sure! Here's a simple example:

from typing import List

def greet_users(names: List[str]) -> None:
    for name in names:
        print(f'Hello, {name}!')

What should I avoid when using type hints?

Avoid over-complicating type hints with unnecessary complexity. Stick to clear and simple types, and don't use type hints for every single variable if it's obvious from the context.

How do type hints improve code quality?

Type hints improve code quality by making the code more understandable, enabling better tooling support, and catching type-related errors before runtime.