购物车
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998},
......
]
功能要求：
1、启动程序后，输入用户名密码后，让用户输入工资，然后打印商品列表
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、在用户使用过程中， 关键输出，如余额，商品已加入购物车等消息，需高亮显示
扩展需求：
1、用户下一次登录后，输入用户名密码，直接回到上次的状态，即上次消费的余额什么的还是那些，再次登录可继续购买
2、允许查询之前的消费记录
3、用户可以添加商品
1 #!/usr/bin/env python3 2 #-*- coding:utf-8 -*- 3 ''' 4 Time:2018/5/4 18:11 5 File:购物车优化 6 ''' 7 8 9 exit_flag = False 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 shopping = [] 19 name = input('请输入您的账号：').strip() 20 f = open('black_file.txt','r',encoding='utf-8') 21 lock_file = f.read()# 读取黑名单文件 22 f.close() 23 if name in lock_file:# 如果账户在黑名单文件里，账户将被锁定 24 print('账户被锁定,请联系管理员！') 25 exit() 26 27 cont = 0 28 with open('b.txt', 'r', encoding='utf-8') as f: 29 yi = eval(f.read()) 30 31 while cont < 3: 32 if name not in yi['name']: 33 print('账号不存在，请注册下你的账号！') 34 name1 = input('请输您的账号：').strip() 35 passwd1 = input('请输入您的密码：').strip() 36 while True: 37 salary = input('请输入您的工资：').strip() 38 if salary.isdigit(): 39 salary = int(salary) 40 break 41 else: 42 print('输入错误') 43 continue 44 lis = {'name': name1, 'passwd': passwd1, 'salary': salary} 45 with open('b.txt', 'w', encoding='utf8') as f: 46 f.write(str(lis)) 47 break 48 else: 49 passwd = input('请输入您的密码：').strip() 50 if name == yi['name'] and passwd == yi['passwd']: 51 print('欢迎回来\033[31;1m%s\033[0m,您的余额还有\033[31;1m%s\033[0m'%(name,yi['salary'])) 52 shopping_list = input("是否要读取上一次购物历史|y|n|：").strip() 53 if shopping_list == 'y': 54 with open('a.txt','r',encoding='utf8') as f: 55 f1 = eval(f.read()) 56 for i,v in enumerate(f1): 57 print(v['name'],v['price']) 58 shopping1 = input('是否要继续购物|y|n：').strip() 59 if shopping1 == 'y': 60 pass 61 else: 62 exit() 63 break 64 elif shopping_list == 'n': 65 break 66 else: 67 print('输入错误！') 68 continue 69 else: 70 print('账号密码错误！') 71 cont += 1 72 73 if cont == 3: 74 print('对不起，密码输错三次，账户被锁定！') 75 f = open('black_file.txt', 'a+') 76 f.write('%s\n' % name) # 密码输入三次将账户写入到黑名单文件里 77 f.close() 78 exit() 79 80 81 82 while not exit_flag: 83 print('-----------商品列表-------') 84 for i,v in enumerate(goods): 85 print(i,v['name'],v['price']) 86 87 choice = input('请输入商品的编号或输入q退出！|a添加商品：').strip() 88 89 if choice.isdigit(): 90 choice = int(choice) 91 if choice >= 0 and choice < len(goods): 92 product = goods[choice] 93 print(product['price']) 94 if product['price'] <= yi['salary']: 95 shopping.append(product) 96 yi['salary'] -= product['price'] 97 with open('b.txt','w',encoding='utf8') as f: 98 f.write(str(yi)) 99 print('商品\033[31;1m%s\033[0m已加入购物车，您的余额还有\033[31;1m%s元\033[0m'%(goods[0]['name'],yi['salary'])) 100 else: 101 print('对不起，您的余额不足，无法购买！') 102 # print(shopping) 103 else: 104 print('商品不存在，请重新输入！') 105 106 elif choice == 'q' or choice == 'Q': 107 # print(shopping) 108 if len(shopping) > 0: 109 print('-----已购买的商品-------') 110 print('ID 商品 价格') 111 for i,v in enumerate(shopping): 112 print('%s. %s %s'%(i,v['name'],v['price'])) 113 print('您的余额还剩\033[31;1m%s\033[0m'%yi['salary']) 114 with open('a.txt','w',encoding='utf-8') as f: 115 f.write(str(shopping)) 116 # print(shopping) 117 exit_flag = True 118 elif choice == 'a': 119 print('添加商品') 120 print('已有商品') 121 for i,v in enumerate(goods): 122 print(i,v['name'],v['price']) 123 124 a = input('商品名称：').strip() 125 a1 = int(input('商品价格：').strip()) 126 dic = {'name':a,'price':a1} 127 128 goods.append(dic) 129 130 print('商品已添加完成') 131 for i,v in enumerate(goods): 132 print(i,v['name'],v['price'])
