def fibo(n):

　　if n < 3:

　　　　return 1

　　return fibo(n-1) + fibo(n-2)

print(fibo(6))

 def fibo1(n):

 　　a, b = ,

 　　for i in range(n):

 　　　　a, b = b, a+b

 　　return a

 print(fibo1())

 def fibo2(n):

     a, b = ,

     while n:

         yield a

         a, b = b, a+b

         n -= 

 for i in fibo2():

     print(i)