leetcode 448. Find All Numbers Disappeared in an Array 找到所有数组中消失的数字 python 最简一行代码 （集合的操作）

class Solution:
    def findDisappearedNumbers(self, nums):
        """
        :type nums: List[int]
        :rtype: List[int]
        """

#       method one  集合操作
        return list(set(range(1, len(nums)+1)) - set(nums))


        # method two
        # s = set(nums)  # 不能直接写成一行，效率太低
        # return [i for i in range(1, len(nums)+1) if i not in s]