python中for语句读取生成器

def fib():

    n = 0

    a,b = 0,1

    while n<10:

        n+=1

        print(b)

        yield

        a,b=b,a+b

a = fib()

for s in a:

    s

#运行结果:

#1 1 2 3 5 8 13 21 34 55