Why does my recursive function with if-elif statements return None?

Question

I\'m currently trying to wrap my head around learning Python and I\'ve come to a bit of a stall on recursive functions. In Think Python, one of the exercises is to write a f

Answer 1

def is_power (a, b):

    if a == 1:
        return True
    if a == 0 and b == 0:
        return True
    if a == 0 or b == 0:
        return False
    if a%b != 0:
        return False
    elif is_power ((a/b), b):
        return True