数组中只出现一次的数字

class Solution:
    # 返回[a,b] 其中ab是出现一次的两个数字
    def FindNumsAppearOnce(self, array):
        # write code here
        targets = []
        for num in array:
            if array.count(num)==1 and num not in targets:
                targets.append(num)
        return targets

import collections
class Solution:
    # 返回[a,b] 其中ab是出现一次的两个数字
    def FindNumsAppearOnce(self, array):
        # write code here
        targets = []
        dic = collections.Counter(array)
        for key,value in dic.items():
            if value < 2:
                targets.append(key)
        return targets