head first python 6 class 扩展-白红宇

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#!/usr/bin/env python3

# -*- coding:utf-8 -*-

import os

class athlete:

def __init__(self, athlete_name, athlete_dob=None, athlete_times=[]):

self.name = athlete_name

self.dob = athlete_dob

self.times= athlete_times

#运动员最好的3组成绩

def top3(self):

return(sorted(set([sanitize(time) for time in self.times]))[0:3])

#为运动员添加一个成绩

def add_time(self, time_value):

self.times.append(time_value)

#为运动员添加一组成绩,使用列表类型.

def add_times(self, time_list):

self.times.extend(time_list)

def openfile(filename):

try:

#打开文件

with open(filename) as athlete_file:

#读取数据

data = athlete_file.readline()

value_list= data.strip().split(',')

username = value_list.pop(0)

userdob = value_list.pop(0)

usertimes= value_list

#返回实例对象

athlete_instance=athlete(username,userdob,usertimes)

return(athlete_instance)

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"]:

name = openfile(name+'.txt')

print(name.name + '的三次最佳成绩是' + str(name.top3()))

talen = athlete('talen')

talen.add_time('3.25')

talen.add_time('3.45')

talen.add_times(['1.30','2.59'])

print(str(talen.top3()))

t@localhost 6$ python3 kelly_c.py
James Lee的三次最佳成绩是['2.01', '2.16', '2.22']
Julie Jones的三次最佳成绩是['2.11', '2.23', '2.59']
Mikey McManus的三次最佳成绩是['2.22', '2.31', '2.38']
Sarah Sweeney的三次最佳成绩是['2.18', '2.21', '2.22']
['1.30', '2.59', '3.25']
继承list类

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#!/usr/bin/env python3
# -*- coding:utf-8 -*-
import os
class athlete:
    def __init__(self, athlete_name, athlete_dob=None, athlete_times=[]):
        self.name = athlete_name
        self.dob = athlete_dob
        self.times= athlete_times
    #运动员最好的3组成绩
    def top3(self):
        return(sorted(set([sanitize(time) for time in self.times]))[0:3])
    #为运动员添加一个成绩
    def add_time(self, time_value):
        self.times.append(time_value)
    #为运动员添加一组成绩,使用列表类型.
    def add_times(self, time_list):
        self.times.extend(time_list)
#使用类继承,继承内置list类
class athletelist(list):
    def __init__(self, a_name, a_dob=None, a_times=[]):
        list.__init__([])
        self.name = a_name
        self.dob = a_dob
        self.extend(a_times)
    def top3(self):
        return(sorted(set([sanitize(t) for t in self]))[0:3])
def openfile(filename):
    try:
        #打开文件
        with open(filename) as athlete_file:
            #读取数据
            data = athlete_file.readline()
            value_list= data.strip().split(',')
            username = value_list.pop(0)
            userdob = value_list.pop(0)
            usertimes= value_list
            #返回实例对象
            athlete_instance=athlete(username,userdob,usertimes)
            return(athlete_instance)
    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"]:
    name = openfile(name+'.txt')
    print(name.name + '的三次最佳成绩是' + str(name.top3()))
talen = athlete('talen')
talen.add_time('3.25')
talen.add_time('3.45')
talen.add_times(['1.30','2.59'])
print(str(talen.top3()))
ken = athletelist('ken')
#为运动员添加一个成绩
#由于继承list,不需要自己再定义添加方法,直接使用list的方法
ken.append('4.25')
#为运动员添加一组成绩,使用列表类型.
ken.extend(['4.56','6.20','5.20'])
print(ken.top3())