What are typing annotations in Python?

What are typing annotations in Python?

Typing annotations in Python are a way to indicate the expected data types of variables, function parameters, and return values.

Can you give me an example of how to use typing annotations?

Sure! Here's a simple example:

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

This indicates that both 'a' and 'b' should be integers and the function returns an integer.

Are typing annotations mandatory in Python?

No, typing annotations are optional in Python. They are mainly used for type hinting to improve code readability and help with static analysis.

What tools can I use to check type annotations?

You can use tools like mypy, Pyright, or the built-in pytypes module to check type annotations in your Python code.