python怎么去重复

万能的set集合去重

list(set([2,3,4,3]))

方法一：

     用内置函数set:

1 list1 = [1, 2, 3, 3, 4, 4, 5, 6, 6, 6, 7, 8, 9]
2 list2 = list(set(list1))
3 print(list2)

方法二：

  遍历去除重复

1 list1 = [1, 2, 3, 3, 4, 4, 5, 6, 6, 6, 7, 8, 9]
2 list2=[]
3 for i in list1:
4 if not i in list2:
5 list2.append(i)
6 print(list2)

列表推导式
1 list1 = [1, 2, 3, 3, 4, 4, 5, 6, 6, 6, 7, 8, 9]
2 list2=[]
3 [list2.append(i) for i in list1 if not i in list2]

可以用集合set方法