1 def values(first, second, number):

2

3 # Add the two values as in the Fibonacci sequence, but take the modulus of

4 # 256 of the result to avoid overflowing into values that require two bytes

5 # or more.

6

7 while number > 0:

8

9 new_value = (first + second) & 0xff

10

11 yield new_value

12

13 first = second

14 second = new_value

15

16 number -= 1

17

18 def unlimited_values(first, second):

19

20 # Add the two values as in the Fibonacci sequence, but take the modulus of

21 # 256 of the result to avoid overflowing into values that require two bytes

22 # or more.

23

24 while True:

25

26 new_value = (first + second) & 0xff

27

28 yield new_value

29

30 first = second

31 second = new_value