What are the best practices for using type hints in Python 3.10?

What are the best practices for using type hints in Python 3.10?

In Python 3.10, it's best to use type hints to improve code readability and maintainability. Start by using built-in types like int, str, and list, and consider using Optional for nullable types.

Can you give me an example of using type hints with functions?

Sure! Here's a simple example:

from typing import List, Optional

def greet(names: List[str], age: Optional[int] = None) -> None:
    for name in names:
        greeting = f'Hello, {name}!'
        if age:
            greeting += f' You are {age} years old.'
        print(greeting)

What are the advantages of using type hints?

Type hints help catch errors early, improve code documentation, and enhance IDE support for features like autocompletion.

Are there any common mistakes to avoid with type hints?

Yes, common mistakes include overusing Any, not keeping type hints updated with code changes, and using type hints that are too complex.