Fibonacci python

Fibonacci.py

class FibonacciService:
    def GetNext(self, num1: int, num2: int) -> int:
        return num1 + num2

    def GenerateList(self, length: int) -> list:
        res = []
        if length >= 1:
            res.append(1)
        if length >= 2:
            res.append(1)

        if length >= 3:
            for x in list(range(3, length+1)):
                res.append(self.GetNext(res[-2], res[-1]))

        return res

fib = FibonacciService()
print(str(fib.GenerateList(0)))
print(str(fib.GenerateList(1)))
print(str(fib.GenerateList(2)))
print(str(fib.GenerateList(10)))