When should the type error happen?

earlier.py

def print_upper(s : str):
    up_s = s.upper()
    def printer(n : int):
        acc = ""
        for i in range(0,n):
            acc += up_s
        return acc
    return printer

later.py

def print_upper(s : str):
    def printer(n : int):
        up_s = s.upper()
        acc = ""
        for i in range(0,n):
            acc += up_s
        return acc
    return printer