Python遍历列表,采用字典存放正在查找的子串。无重复添加到字典;有重复,获取重复值的前一个下标,其后位置到当前下标更新至字典。 class Solution: def maxLength(self , arr ): # write code here dic = {arr[0]: 0} len_max = 1 for i in range(1, len(arr)): if arr[i] not in dic: dic[arr[i]] = i ...