What is the difference between?

Question

def func(self, lst: List[int]) -> int:
# body

def func(self, lst):
# body

Answer 1

The upper method uses *type annotation*, the bottom one doesn't

Answer 2

Type annotations are just a hint for the user – it does not do any type casting! Therefore it does not influence how the code is executed.

Here's a brief article, how the annotations can be used:
https://towardsdatascience.com/type-annotations-in-JUMP_LINK__&&__python__&&__JUMP_LINK-d90990b172dc

Answer 3

The top one's list parameter takes explicitly a list of integers and also explicitly returns an integer

Answer 4

The bottom is the same,
These are two different solutions in the same problem on a problem solving website

Answer 5

Is this considered a difference?

Answer 6

Thanks for help