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1. #!/usr/bin/env python3
   
2. # -*- coding:utf-8 -*-
   
3. def filetolist(file,listname):
   
4.     try:
   
5.         #打开文件
   
6.         with open(file) as jaf:
   
7.             #读取数据行
   
8.             data = jaf.readline()
   
9.         #转换成list
   
10.         listname=data.strip().split(',')
    
11.         return listname
    
12.     except IOError as ioerr:
    
13.         print('File error : %s' % ioerr)
    
14.         return(None)
    
15.         
    
16. #处理字符,转换成m.s格式
    
17. def sanitize(time_string):
    
18.     if '-' in time_string:
    
19.         splitter = '-'
    
20.     elif ':' in time_string:
    
21.         splitter = ':'
    
22.     else:
    
23.         return time_string
    
24.     (min, sec) = time_string.split(splitter)
    
25.     return (min + '.' + sec)
    
26. 
    
27. for name in ["james", "julie", "mikey", "sarah"]:
    
28.     thelist=filetolist(name+".txt",name)
    
29.     cleanname = 'clean' + name
    
30.     cleanname = []
    
31.     for each_t in thelist:
    
32.         cleanname.append(sanitize(each_t))
    
33.     print(sorted(cleanname))
    
34.     #使用列表推导式
    
35.     print('use list comprehension')
    
36.     cleanname2 = [sanitize(each_it) for each_it in thelist]
    
37.     print(sorted(cleanname2))
    
38.     #使用for 处理
    
39. # sorted_name= sorted(cleanname2)
    
40. # unique_name = 'unique_' + name
    
41. # unique_name = []
    
42. # for item in sorted_name:
    
43. # if item not in unique_name:
    
44. # unique_name.append(item)
    
45. # print(unique_name[0:3])
    
46.     #使用工厂函数set()
    
47.     print(sorted(set(cleanname2))[0:3])

t@localhost 5$ python3 kelly.py
['2.01', '2.01', '2.22', '2.34', '2.34', '2.45', '3.01', '3.10', '3.21']
use list comprehension
['2.01', '2.01', '2.22', '2.34', '2.34', '2.45', '3.01', '3.10', '3.21']
['2.01', '2.22', '2.34']
['2.11', '2.11', '2.23', '2.23', '2.59', '3.10', '3.10', '3.21', '3.21']
use list comprehension
['2.11', '2.11', '2.23', '2.23', '2.59', '3.10', '3.10', '3.21', '3.21']
['2.11', '2.23', '2.59']
['2.22', '2.38', '2.49', '3.01', '3.01', '3.02', '3.02', '3.02', '3.22']
use list comprehension
['2.22', '2.38', '2.49', '3.01', '3.01', '3.02', '3.02', '3.02', '3.22']
['2.22', '2.38', '2.49']
['2.18', '2.25', '2.39', '2.54', '2.55', '2.55', '2.55', '2.58', '2.58']
use list comprehension
['2.18', '2.25', '2.39', '2.54', '2.55', '2.55', '2.55', '2.58', '2.58']
['2.18', '2.25', '2.39']