题解 | #数组中只出现一次的两个数字#

class Solution:
    def FindNumsAppearOnce(self, nums: List[int]) -> List[int]:
        # write code here
        checker = {}
        for num in nums:
            checker[num] = checker.get(num, 0) + 1
        ascend = sorted(checker, key=checker.__getitem__)
        return [ascend[0], ascend[1]] if ascend[0] < ascend[1] else [ascend[1], ascend[0]]