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]