找一个列表中没有重复的数的和

a = [1,2,2,3,3,6,5,7,7]
sum = 0
for i in a:
if a.count(i) == 1:
sum += i
print(sum)

posted @ 2017-09-06 08:59 hzxPeter 阅读(76) 评论(0) 收藏举报