3.py

def fibonacci(n):
    a,b = 0,1
    ret = [a]
    for i in range(n):
        a,b = b,a+b
        ret.append(a)
    return ret

def consumer(n):
    work = fibonacci(n)
    ret = 0
    for i in work:
        ret += i
    return ret

consumer(10)