python剑指offer数组中出现次数超过一半的数字

# -*- coding:utf-8 -*-
 
class Solution:
    def MoreThanHalfNum_Solution(self, numbers):
        if (numbers is None or len(numbers) == 0):
            return 0
        current = numbers[0]
        flag = 1
        for i in numbers[1:]:
            if (i != current):
                flag -= 1
            else:
                flag += 1
            if (flag == 0):
                current = i
                flag = 1
        if (flag >= 1):
            count = 0
            for i in numbers:
                if (current == i):
                    count += 1
            if (count > len(numbers)//2):
                return current
        return 0