递归 函数自己调用自己

 1 #!/usr/bin/env python
 2 # 递归
 3 def f4(defth,a1, a2) :
 4 
 5     if defth == 10 :
 6         return a1
 7     print(a1)
 8 
 9     a3 = a1 + a2
10     r = f4(defth + 1,a2, a3)
11 
12 
13 s = f4(0,0 ,1)
14 print(s)

函数自己调用自己