python 关于对象方法调用的问题

class Solution(object):
    def tribonacci(self, n):
        if n==0:
            return 0
        if n==1:
            return 1
        if n==2:
            return 1
        return tribonacci(n-1)+tribonacci(n-2)+tribonacci(n-3)

会报错

global name 'tribonacci' is not defined

解决方法

class Solution(object):
    def tribonacci(self, n):
        if n==0:
            return 0
        if n==1:
            return 1
        if n==2:
            return 1
        #return tribonacci(n-1)+tribonacci(n-2)+tribonacci(n-3)
        return self.tribonacci(n-1)+self.tribonacci(n-2)+self.tribonacci(n-3)