What does the syntax "cls: 'BasePlugin'" mean?

Question

Python

Hi all!
I would not ask a question here if I knew how to formulate it for a search engine. Therefore, do not judge.
I met a syntax that is equally unknown to me ( https://habr.com/company/binarydistrict/blog/422409/):

def __new__(mcs, name, bases, attrs):  
        cls: 'BasePlugin' = super().__new__(mcs, name, bases, attrs)

In the second line, the part with is not clear cls:
. Please tell me what it is.

Answer 1

This is Type Hints . Read as "Assign to variable cls of type BasePlugin the result of calling the __new__ method of the superclass".