python --RecursionError: maximum recursion depth exceeded in comparison

在学习汉娜塔的时候,遇到一个error RecursionError: maximum recursion depth exceeded in comparison

经过百度,百度的方法:

加上:

import sys

sys.setrecursionlimit(100000)

可是我加上之后结果如下,并没有解决问题,python还提示意外退出:

1、再此经过思考(也不是思考,再从头看了学习视频,添加了两个return None,问题解决✌️✌️💕)

python 函数要么返回预期的值,要么返回None

 2、注意点,递归要有结束的条件:如下

1 def fun_a(n):
2     #print(n)
3     #if n == 1:
4         #return 1
5     return n*fun_a(n-1)
6 rst=fun_a(5)
7 print(rst)
Traceback (most recent call last):
  File "/Users/fudandan/Desktop/hello/11/diaoyong.py", line 6, in <module>
    rst=fun_a(5)
  File "/Users/fudandan/Desktop/hello/11/diaoyong.py", line 5, in fun_a
    return n*fun_a(n-1)
  File "/Users/fudandan/Desktop/hello/11/diaoyong.py", line 5, in fun_a
    return n*fun_a(n-1)
  File "/Users/fudandan/Desktop/hello/11/diaoyong.py", line 5, in fun_a
    return n*fun_a(n-1)
  [Previous line repeated 996 more times]
RecursionError: maximum recursion depth exceeded
[Finished in 0.1s with exit code 1]

 结束条件加上:

1 def fun_a(n):
2     #print(n)
3     if n == 1:
4         return 1
5     return n*fun_a(n-1)
6 rst=fun_a(5)
7 print(rst)

就可以自行并且没有错误了

 

每天进步一点点~~

 

posted @ 2019-06-23 16:43  正霜霜儿  阅读(6469)  评论(0编辑  收藏  举报