三级菜单模拟登陆购物车等作业

Posted 2020-10-12

一、三级菜单

三级菜单要求：
    1. 运行程序输出第一级菜单
    2. 选择一级菜单某项，输出二级菜单，同理输出三级菜单
    3. 返回上一级菜单和顶部菜单
    4. 菜单数据保存在文件中

代码如下：

 1 import pickle
 2 import sys
 3 import os
 4 
 5 menu = {
 6     ‘北京‘:{
 7         ‘海淀‘:{
 8             ‘五道口‘:{
 9                 ‘soho‘:{},
10                 ‘网易‘:{},
11                 ‘google‘:{}
12             },
13             ‘中关村‘:{
14                 ‘爱奇艺‘:{},
15                 ‘汽车之家‘:{},
16                 ‘youku‘:{},
17             },
18             ‘上地‘:{
19                 ‘百度‘:{},
20             },
21         },
22         ‘昌平‘:{
23             ‘沙河‘:{
24                 ‘老男孩‘:{},
25                 ‘北航‘:{},
26             },
27             ‘天通苑‘:{},
28             ‘回龙观‘:{},
29         },
30         ‘朝阳‘:{},
31         ‘东城‘:{},
32     },
33     ‘上海‘:{
34         ‘闵行‘:{
35             "人民广场":{
36                 ‘炸鸡店‘:{}
37             }
38         },
39         ‘闸北‘:{
40             ‘火车战‘:{
41                 ‘携程‘:{}
42             }
43         },
44         ‘浦东‘:{},
45     },
46     ‘山东‘:{},
47 }
48 
49 # 把menu菜单序列化到文件中
50 if not os.path.isfile(‘./level_3_menu.txt‘):
51     pickle.dump(menu,open(‘./level_3_menu.txt‘,‘wb‘))
52 
53 # 反序列化
54 data = pickle.load(open(‘./level_3_menu.txt‘,‘rb‘))
55 
56 current_layer = data  #当前层
57 last_layers =  [current_layer]  #上一层
58 
59 
60 while True:
61     for key in current_layer:
62         print(key)
63     choice = input(">>:").strip()
64     if len(choice)==0:continue
65     if choice in current_layer: #进入下一层
66         last_layers.append(current_layer) #当前层添加到列表
67         current_layer = current_layer[choice]
68         
69     if choice == "b":
70         if last_layers:
71             current_layer = last_layers.pop()
72     if choice == ‘q‘:
73         break

三级菜单

 

二、模拟登陆

要求：
模拟登陆
    1. 用户输入帐号密码进行登陆
    2. 用户信息保存在文件内
    3. 用户密码输入错误三次后锁定用户

代码如下：

import getpass
import os
import sys
import pickle

#把用户列表序列化到文件中去
if not os.path.isfile(‘./user_info.txt‘):
    user_info = {‘test‘:‘123456‘,‘abc‘:‘abc‘,‘liubei‘:‘123‘,‘guanyu‘:‘123‘}
    pickle.dump(user_info,open(‘./user_info.txt‘,‘wb‘))

#反序列化
user_info = pickle.load(open(‘./user_info.txt‘,‘rb‘)) 

#定义密码尝试次数
num = 3

if not os.path.isfile(‘./lock.txt‘):
    l = []
    pickle.dump(l,open(‘./lock.txt‘,‘wb‘))

lock = pickle.load(open(‘./lock.txt‘,‘rb‘)) 


flag = False
while flag == False:
    username=input("please input your username: ").strip()
    #用户名不能为空
    if username == "":
        print ("\033[31;1musername or password isn‘t be empty !\033[0m")
        continue 
    
    #判断用户是否存在
    elif username not in user_info.keys():
        print ("\033[31;1mThere is no such user !\033[0m")
        continue

    #判断用户有没有被锁定
    elif username in lock:
        print ("\033[31;1muser %s is locked,now exit script !\033[0m"%username)
        sys.exit()
   
    while flag == False:
        password=getpass.getpass("password:").strip()
        if password == "":
            print ("\033[31;1musername or password isn‘t be empty !\033[0m")
            continue
  
        elif password == user_info[username]:
            print ("\033[35;5mWelcome %s !\033[0m"%username)
            flag = True
        else:
            num -= 1
            print ("username or password is wrong,there are %d chances"% num)
    
            if num == 0:
                print ("\033[31;1mThe user %s is locked !\033[0m"%username)
                lock.append(username)
                pickle.dump(lock,open(‘./lock.txt‘,‘rb+‘))
                sys.exit()

模拟登陆

 

三、购物车

购物车要求：
    1. 商品信息- 数量、单价、名称
    2. 用户信息- 帐号、密码、余额
    3. 用户可充值
    4. 购物历史信息
    5. 允许用户多次购买，每次可购买多件
    6. 余额不足时进行提醒
    7. 用户退出时 ，输出档次购物信息
    8. 用户下次登陆时可查看购物历史
    9. 商品列表分级
代码如下：

  1 import getpass
  2 import pickle
  3 import sys
  4 import os
  5 
  6 #user_info = {‘user1‘: [‘123456‘, 50000],
  7 #             ‘user2‘: [‘123456‘, 60000]
  8 #            }
  9 
 10 product_list = [[1, ‘Iphone7‘, 7000],
 11                 [2, ‘computer‘, 5000],
 12                 [3, ‘Python Book‘, 100],
 13                 [4, ‘Bike‘, 299],
 14                 [5, ‘Coffee‘, 30]
 15                ]
 16 
 17 if not os.path.isfile(‘./users_info.txt‘):
 18     u = {}
 19     pickle.dump(u, open(‘./users_info.txt‘, ‘wb‘))
 20 user_info = pickle.load(open(‘./users_info.txt‘,‘rb‘))
 21 
 22 flag = False
 23 while flag == False:
 24     print ("欢迎使用XXX购物商城".center(50,"*"))
 25     print ()
 26     print ("1.注册 2.登陆 q.退出".center(50,">"))
 27 
 28     choice = input("请选择: ")
 29     if choice == "1":
 30        flag_regist = False
 31        while flag_regist == False:
 32            useradd = input("Please input create username: ").strip()
 33            if len(useradd) == 0:
 34                print ("用户名不能为空")
 35            elif useradd in user_info:
 36               print ("该用户名已经存在,请用其他用户名注册")
 37            elif not useradd.isidentifier():
 38               print ("用户名不要以数字开头")
 39            else:
 40               while flag_regist == False:
 41                   user_info[useradd]=[0,0]
 42                   passwd = getpass.getpass("请输入要注册用户的密码(密码至少需要6位)：")
 43                   length = len(passwd)
 44                   if length == 0:
 45                       print ("密码不能为空")
 46                   elif length >=6:
 47                       user_info[useradd][0]=passwd
 48                       pickle.dump(user_info, open(‘./users_info.txt‘, ‘rb+‘))
 49                       print ("成功创建用户:%s"%useradd)
 50                       flag_regist = True
 51 
 52 
 53     elif choice == "2":
 54         times = 3
 55         #flag = False
 56         if not os.path.isfile(‘./lockfile.txt‘):
 57             lock = []
 58             pickle.dump(lock,open(‘./lockfile.txt‘,‘wb‘))
 59         lock = pickle.load(open(‘./lockfile.txt‘,‘rb‘)) 
 60 
 61         while flag == False:
 62             username = input("please input your username: ").strip()
 63             #password = getpass.getpass("password:").strip()
 64             if username == "":
 65                 print("\033[31;1musername or password isn‘t be empty !\033[0m")
 66                 continue
 67 
 68             if username not in user_info.keys():
 69                 print("\033[31;1mThere is no such user !\033[0m")
 70                 continue
 71              #判断用户有没有被锁定
 72             if username in lock:
 73                 print ("\033[31;1muser %s is locked,now exit script !\033[0m"%username)
 74                 sys.exit()
 75 
 76             while flag == False:
 77                 password = getpass.getpass("password: ").strip()
 78                 if password == "":
 79                     print ("\033[31;1musername or password isn‘t be empty !\033[0m")
 80                     continue
 81                 if password == user_info[username][0]:
 82                     salary = user_info[username][1]
 83                     if not os.path.isfile(‘./%s.txt‘ % username):
 84                         d = {}
 85                         pickle.dump(d, open(‘./%s.txt‘ % username, ‘wb‘))
 86                     shopping_cart_history = pickle.load(open(‘./%s.txt‘ % username, ‘rb‘))
 87                     print("登录成功，你的账号名称为:%s,当前账户可用余额为:%s元" % (username, salary))
 88                     if shopping_cart_history:
 89                         print("你所购商品的历史信息如下：".center(50, ‘=‘))
 90                         print("id\t商品名    单价    数量    总价")
 91                         for key in shopping_cart_history:
 92                             print("%s\t%s   %s   %s     %s" % (
 93                                 shopping_cart_history[key][0],
 94                                 key,
 95                                 shopping_cart_history[key][1],
 96                                 shopping_cart_history[key][2],
 97                                 shopping_cart_history[key][3],
 98                             ))
 99                         print("END".center(62, ‘=‘))
100                     choice = input("是否需要充值y/n: ").strip()
101                     if choice.casefold() == ‘y‘:
102                         money = int(input("输入要充的金额: "))
103                         salary = user_info[username][1] + money
104                         print("充值成功，当前余额为:%s" % salary)
105                         print("\033[35;5mWelcome %s Into the shopping cart\033[0m\n%s" % (username, "-" * 50))
106                         flag = True
107                     else:
108                         print("\033[35;5mWelcome %s Into the shopping cart\033[0m".center(70,"*") % (username))
109                         flag = True
110                 else:
111                     times -= 1
112                     print("username or password is wrong,there are %d chances" % (times))
113                 if times == 0:
114                     print("\033[31;1mThe user is Forbidden login!\033[0m")
115                     lock.append(username)
116                     pickle.dump(lock,open(‘./lockfile.txt‘,‘rb+‘))
117                     sys.exit()
118 
119         shopping_cart = {}
120         while True:
121             for product in product_list:
122                 print(product)
123             p_id = input("[购买商品请输入商品id号,如果要退出系统就输入q]# ").strip()
124             if p_id.isdigit():
125                 p_id = int(p_id)
126                 if p_id >= 0 and p_id <= len(product_list):
127                     p_num = input("[请输要购买的该商品的数量]# ").strip()
128                     if p_num.isdigit():
129                         p_num = int(p_num)
130                         product_id = product_list[p_id - 1][0]
131                         product_price = product_list[p_id - 1][2]
132                         product = product_list[p_id - 1][1]
133                         # print (product_list[p_id-1][2]*p_num)
134                         pay = product_list[p_id - 1][2] * p_num
135                         if salary >= pay:
136                             # 判断购物车中是否有同名的商品
137                             if product in shopping_cart:
138                                 shopping_cart[product][2] += p_num
139                                 shopping_cart[product][3] += pay
140                             else:
141                                 shopping_cart[product] = [product_id, product_price, p_num, pay]
142                             salary -= pay
143                             print(
144                                 "Added product \033[31;1m%s\033[0m into shopping cart \033[31;1myour current Balance is %s\033[0m" % (
145                                     product, salary))
146                         else:
147                             print("余额不足,需要付%s元,你还差%s元,无法购买！" % (pay, pay - salary))
148                             choice = input("是否需要充值y/n: ").strip()
149                             if choice.casefold() == ‘y‘:
150                                 money = int(input("输入要充的金额: "))
151                                 salary = user_info[username][1] + money
152                                 print("充值成功，当前余额为:%s" % salary)
153                             else:
154                                 pass
155 
156                 else:
157                     print("没有该商品")
158             elif p_id == ‘q‘:
159                 # 把本次购物清单加到历史购物清单中去
160                 if shopping_cart:
161                     for pro in shopping_cart:
162                         # 判断历史购物清单中是否有和本次购买商品同名的
163                         if pro in shopping_cart_history:
164                             shopping_cart_history[pro][2] += shopping_cart[pro][2]
165                             shopping_cart_history[pro][3] = shopping_cart_history[pro][1] * shopping_cart[pro][2]
166                         else:
167                             shopping_cart_history[pro] = [shopping_cart[pro][0], shopping_cart[pro][1], shopping_cart[pro][2],
168                                                           shopping_cart[pro][3]]
169                     # shopping_cart_history.update(shopping_cart)
170                     pickle.dump(shopping_cart_history, open(‘./%s.txt‘ % username, ‘rb+‘))
171                     total_cost = 0
172                     print("你本次已购以下商品".center(50, ‘*‘))
173                     print("id\t商品名    单价    数量    总价")
174                     for key in shopping_cart:
175                         print("%s\t%s   %s   %s     %s" % (
176                             shopping_cart[key][0],
177                             key,
178                             shopping_cart[key][1],
179                             shopping_cart[key][2],
180                             shopping_cart[key][3],
181                         ))
182                         total_cost += shopping_cart[key][3]
183                     print("您的总花费为:", total_cost)
184                     print("您的余额为:", salary)
185                     print("END".center(60, "*"))
186                     break
187                 else:
188                     print("END".center(60, "*"))
189                     break
190         user_info[username][1] = salary
191         pickle.dump(user_info, open(‘./users_info.txt‘, ‘rb+‘))
192     elif choice == "q":
193         print ("已退出XXX购物商城系统!")
194         break

购物车