in_order=sorted(delete_repetition) #采用复制排序sorted函数对无重复性的新集合进行排序
return (in_order[0:3]) #返回列表前三项
# 分别输出对应文件中排名前三的不重复的时间成绩
print (get_prev_three("james.txt"))
print (get_prev_three("julie.txt"))
print (get_prev_three("mikey.txt"))
print (get_prev_three("sarah.txt"))
输出结果：
['2.01', '2.22', '2.34']
['2.11', '2.23', '2.59']
['2.22', '2.38', '2.49']
['2.18', '2.25', '2.39']
