class Fib(): """A Fibonacci number. >>> start = Fib() >>> start 0 >>> start.next() 1 >>> start.next().next() 1 >>> start.next().next().next() 2 >>> start.next().next().next().next() 3 >>> start.next().next().next().next().next() 5 >>> start.next().next().next().next().next().next() 8 >>> start.next().next().next().next().next().next() # Ensure start isn't changed 8 """ def __init__(self, value=0): self.value = value def next(self): "*** YOUR CODE HERE ***" def __repr__(self): return str(self.value)