num = list(range(1,21)) print(num) for num_1 in num: if num_1 % 3 == 0: #被3整除的展示出来 print(num_1) else: #否则就从列表中删除 num.remove(num_1) print(num)
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
3
6
9
12
15
18
[2, 3, 5, 6, 8, 9, 11, 12, 14, 15, 17, 18, 20] #隔两个才删除