利用字典方法

class Solution:
    def MoreThanHalfNum_Solution(self, numbers):
        # write code here
        A = {}
        for i in numbers:
            if i in A:
                A[i] += 1
            else:
                A[i] = 1
        maxnum = max(A.values())
        print(maxnum)
        if 2*maxnum > len(numbers):
            return [k for k,v in A.items() if v== max(A.values())][0]
        else:
            return 0