Python__斐波那契数列

###菲波那切数列
n = int(input('请输入你想要知道的月份！！>>  '))
i = 1
j = 1
m = 2
for k in range(4,n+1):
    i = j
    j = m
    m = i + j
    print('第%s个月的兔子个数是%s:'%(k,m))