python中如何去除列表中重复元素？

方法一：

用内置函数set:

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

方法二：

遍历去除重复

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

列表推导式

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