head first python 5

#!/usr/bin/env python3
# -*- coding:utf-8 -*-
def filetolist(file,listname):
    try:
        #打开文件
        with open(file) as jaf:
            #读取数据行
            data = jaf.readline()
        #转换成list
        listname=data.strip().split(',')
        return listname
    except IOError as ioerr:
        print('File error : %s' % ioerr)
        return(None)

#处理字符,转换成m.s格式
def sanitize(time_string):
    if '-' in time_string:
        splitter = '-'
    elif ':' in time_string:
        splitter = ':'
    else:
        return time_string
    (min, sec) = time_string.split(splitter)
    return (min + '.' + sec)

for name in ["james", "julie", "mikey", "sarah"]:
    thelist=filetolist(name+".txt",name)
    cleanname = 'clean' + name
    cleanname = []
    for each_t in thelist:
        cleanname.append(sanitize(each_t))
    print(sorted(cleanname))
    #使用列表推导式
    print('use list comprehension')
    cleanname2 = [sanitize(each_it) for each_it in thelist]
    print(sorted(cleanname2))
    #使用for 处理
#    sorted_name= sorted(cleanname2)
#    unique_name = 'unique_' + name
#    unique_name = []
# for item in sorted_name:
# if item not in unique_name:
#            unique_name.append(item)
# print(unique_name[0:3])
    #使用工厂函数set()
    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']