Generics in Python "Annotation Variables and Functions"

 def add(x: int, y: int) -> int:

    return x + y

annotation Variables:-

we can annotate a variable using ":" colon sign proceeding with the data type 

variable_name : data_type = value 

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from typing import Optional

def get_name(prefix: Optional[str]) -> str:

    if prefix:

        return prefix + "John"

    return "John"

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