• 这里主要用到 【数组.count(元素)】这个计算数组中某一个元素的个数 
class Solution:
    def MoreThanHalfNum_Solution(self, numbers):
        n = len(numbers)
        list01 = set(numbers)
        for i in list01:
            if numbers.count(i) > n // 2:
                return i