【python练习】购物车程序

购物车程序

基本功能:

1、使用用户名密码登陆

2、允许用户根据商品编号购买商品

3、用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒

4、可随时退出，退出时，打印已购买商品和余额

5、可以记录用户的消费记录，余额，在下次登陆的时候恢复

6、允许查询之前的消费记录

运行方法:
文件执行、交互式执行。

使用说明：
测试账号（用户名：liubei，密码：lb123）

用户数据：

{"lock state": true, "account": "liubei", "password": "lb123", "balance": 993, "record": {"20180101": {"00:00:00": {"name": "u7535u8111", "price": 1999}, "23:01:02": {"name": "u9f20u6807", "price": 10}}, "20180202": {"00:02:00": {"name": "u7f8eu5973", "price": 998}}, "20180724": {"22:11:13": {"name": "u7535u8111", "price": 1999}, "22:11:14": {"name": "u9f20u6807", "price": 10}, "22:38:21": {"name": "u7535u8111", "price": 1999}, "22:40:32": {"name": "u7535u8111", "price": 1999}, "22:41:31": {"name": "u7535u8111", "price": 1999}, "22:41:35": {"name": "u9f20u6807", "price": 10}, "22:42:41": {"name": "u7535u8111", "price": 1999}, "22:42:43": {"name": "u9f20u6807", "price": 10}, "22:46:16": {"name": "u9f20u6807", "price": 10}, "22:56:56": {"name": "u9f20u6807", "price": 10}, "23:13:32": {"name": "u7535u8111", "price": 1999}}}}

..dataliubei

  1 #!/usr/bin/env python
  2 # -*- coding: utf-8 -*-
  3 
  4 '''
  5 测试账号（用户名：liubei，密码：lb123）
  6 '''
  7 
  8 import os,time
  9 import json
 10 
 11 goods = [
 12     {'name': '电脑', 'price': 1999},
 13     {'name': '鼠标', 'price': 10},
 14     {'name': '游艇', 'price': 20},
 15     {'name': '美女', 'price': 998}
 16 ]
 17 
 18 class Shopping(object):
 19     def __init__(self):
 20         self.acc_data = {} #用户信息
 21 
 22     def authentication(self):
 23         '''
 24         用户认证程序
 25         :return:登陆成功返回True
 26         '''
 27         acc = ''
 28         auth_list = []  # 用于存放每次输入的用户名
 29 
 30         print('- - - Login - - -')
 31         while auth_list.count(acc) < 3:  # 当相同的用户名登陆失败3次，跳出循环
 32             acc = input('Account:').strip()
 33             pwd = input('Password:').strip()
 34 
 35             path = 'data\%s' % acc  # 用户信息存放路径
 36             if os.path.isfile(path):  # 用户名是否存在
 37                 with open(path) as f:
 38                     self.acc_data = json.loads(f.read())    #读取信息
 39                     if self.acc_data['lock state']:  #用户是否被锁定
 40                         if self.acc_data['password'] == pwd:
 41                             print('Login success !')
 42                             return True
 43                         else:
 44                             auth_list.append(acc)
 45                             print('The password is error,you have %s times' % (3 - auth_list.count(acc)))
 46                     else:
 47                         print('You have tried 3 times,your account has locked.')
 48                         exit()
 49             else:
 50                 auth_list.append(acc)
 51                 print('The account is not exist...you have %s times' % (3 - auth_list.count(acc)))
 52 
 53         if auth_list.count(acc) == 3:  # 已存在的用户登陆失败三次，锁定，写入文件
 54             if os.path.isfile(path):
 55                 with open(path, 'w')as f:
 56                     self.acc_data['lock state'] = False
 57                     f.write(json.dumps(self.acc_data))
 58 
 59     def shopping(self):
 60         '''
 61         购物窗口
 62         :return:
 63         '''
 64         buy_dic = []
 65         while True:
 66             print('List of goods'.center(30,'-'))
 67             for index,item in enumerate(goods,1):
 68                 print('%s . 33[0;33m%s33[0m   33[0;32m%s33[0m'%(index,item['name'],item['price']))
 69             buy = input('("q" to exit)
choose one to buy:').strip()
 70             if buy.isnumeric() and 0 < int(buy) <= len(goods): #输入是数字且在商品序号范围内
 71                 if self.acc_data['balance'] >= int(goods[int(buy) - 1]['price']):
 72                     self.acc_data['balance'] -= int(goods[int(buy) - 1]['price'])    #扣除余额
 73                     buy_dic.append(goods[int(buy) - 1]) #购物记录
 74                     #更新购物清单
 75                     localday = time.strftime('%Y%m%d', time.localtime())
 76                     localtime = time.strftime('%H:%M:%S', time.localtime())
 77                     if localday in self.acc_data['record']:
 78                         self.acc_data['record'][localday][localtime] = goods[int(buy) - 1]
 79                     else:
 80                         self.acc_data['record'][localday] = {localtime:goods[int(buy) - 1]}
 81                     #写入文件
 82                     if self.db_handle():
 83                         print('You have buy:33[0;32m%s33[0m'%goods[int(buy) - 1]['name'])
 84                     else:
 85                         print('33[0;31mSystem error...you have not buy %s33[0m'%goods[int(buy) - 1]['name'])
 86                 else:
 87                     print('33[0;33mYour balance can not afford anyone..33[0m')
 88             elif buy == 'q':
 89                 if len(buy_dic) != 0:
 90                     print('33[1;31;46mShopping receipts33[0m')
 91                     for index,item in enumerate(buy_dic,1):
 92                         print('%s . 33[0;33m%s33[0m   33[0;32m%s33[0m' % (index, item['name'], item['price']))
 93                 break
 94             else:
 95                 print('33[0;31minput error...33[0m')
 96 
 97     def recharge(self):
 98         '''
 99         充值
100         :return:
101         '''
102         recharge = input('You want to recharge:').strip()
103         if recharge.isnumeric() and int(recharge) < 0:
104             print('33[0;31mPlease input a number greater than zero33[0m')
105         elif recharge.isnumeric():
106             self.acc_data['balance'] += int(recharge)
107             if self.db_handle():
108                 print('33[0;31mRecharge success !33[0m')
109             else:
110                 print('33[0;31mRecharge error...33[0m')
111         else:
112             print('33[0;31minput error...33[0m')
113 
114     def record(self):
115         '''
116         查询历史清单
117         :return:
118         '''
119         for date in self.acc_data['record']:
120             print('33[0;34m%s33[0m'%date.center(20, '-'))
121             for time in self.acc_data['record'][date]:
122                 print(time, ':', self.acc_data['record'][date][time]['name'],
123                       self.acc_data['record'][date][time]['price'])
124 
125     def exit(self):
126         '''
127         退出函数
128         :return:
129         '''
130         print('exit...')
131         exit()
132 
133     def db_handle(self):
134         '''
135         文件写入
136         :return:
137         '''
138         with open('data\'+self.acc_data['account'],'w') as f:
139             f.write(json.dumps(self.acc_data))
140             return True
141 
142     def interaction(self):
143         '''
144         交互
145         :return:
146         '''
147         print(' Mall '.center(30, '*'))
148         if self.authentication():    #登陆认证成功
149             exit_flag = False
150             while not exit_flag:
151                 print('''
Vip name:{account}
Balance:33[1;31;46m{balance}33[0m

1.  购物
2.  充值
3.  清单
4.  退出
152                 '''.format(account=self.acc_data['account'], balance=self.acc_data['balance']))
153 
154                 menu_dic = { #对应类方法的字典
155                     '1': self.shopping,
156                     '2': self.recharge,
157                     '3': self.record,
158                     '4': self.exit
159                 }
160                 user_option = input('>>>').strip()
161                 if user_option in menu_dic:
162                     menu_dic[user_option]()
163                 else:
164                     print('Without this option(%s)' % user_option)
165 
166 s = Shopping()    #实例化
167 s.interaction()