从一组数据中去除掉重复的元素，并将其排序输出

chenaaa

from random import randint
m=18
n=20
list1=[randint(1,n+1) for i in range(m)]
print list1

list2=[]
for i in range(m):
    if list1[i] not in list2:
        list2.append(list1[i])
print list2
print sorted(list2)

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