1 # 1.三级菜单 2 menu = { 3 '北京':{ 4 '海淀':{ 5 '五道口':{ 6 'soho':{}, 7 '网易':{}, 8 'google':{} 9 }, 10 '中关村':{ 11 '爱奇艺':{}, 12 '汽车之家':{}, 13 'youku':{}, 14 }, 15 '上地':{ 16 '百度':{}, 17 }, 18 }, 19 '昌平':{ 20 '沙河':{ 21 '老男孩':{}, 22 '北航':{}, 23 }, 24 '天通苑':{}, 25 '回龙观':{}, 26 }, 27 '朝阳':{}, 28 '东城':{}, 29 }, 30 '上海':{ 31 '闵行':{ 32 "人民广场":{ 33 '炸鸡店':{} 34 } 35 }, 36 '闸北':{ 37 '火车战':{ 38 '携程':{} 39 } 40 }, 41 '浦东':{}, 42 }, 43 '山东':{}, 44 } 45 46 exit_tag=True 47 while exit_tag: 48 for key in menu: 49 print(key) 50 choice=input('>: ').strip() 51 if choice == 'quit': 52 exit_tag=False 53 continue 54 if len(choice) == 0: 55 continue 56 57 if choice in menu: 58 while exit_tag: 59 first= menu[choice] 60 for key2 in second: #第二层循环 61 print(key2) 62 choice2=input('>>：').strip() 63 if choice2 == 'bye': 64 break 65 if choice2 == 'quit': 66 exit_tag = False 67 continue 68 if len(choice2) == 0: 69 continue 70 if choice2 in first: 71 while exit_tag: 72 second = first[choice2] 73 for key3 in second: #第三层 74 print(key3) 75 choice3 = input('>>>: ').strip() 76 if choice3 == 'bye': 77 break 78 if choice3 == 'quit': 79 exit_tag = False 80 continue 81 if choice3 in third: 82 third = second[choice3] 83 for key4 in third: 84 print(key4) 85 choice4 = input('>>>>: ').strip() 86 if choice4 == 'bye': 87 break 88 if choice4 == 'quit': 89 exit_tag=False 90 continue 91 # 92 # 2.购物车程序： 93 good = { 94 '1':{'apple': 100}, 95 '2':{'tesla': 100}, 96 '3':{'mac': 100}, 97 '4':{'lenovo': 100}, 98 '5':{'chicken': 100}, 99 } 100 shoping_list = [] 101 exit_tag = True 102 count = 0 103 while exit_tag: 104 account = input('your acconut: ').strip('|') 105 password = input('your password: ').strip() 106 with open('login.txt', 'r') as file: 107 pair = file.read().split('|') 108 name, secert = pair 109 # print(name,secert) 110 if account not in pair: 111 print('用户名不存在') 112 if account == name and password == secert: 113 print('登陆成功') 114 salary = input('请输入你的工资： ').strip() 115 if salary == 'quit': 116 exit_tag = False 117 continue 118 if not salary.isdigit(): 119 print('请重新输入（工资必须为数字)：') 120 else: 121 salary_balance = int(salary) 122 while exit_tag: 123 for key in good: 124 print(key,good[key]) 125 serial = input('请输入商品编号： ').strip() 126 if serial == 'quit': 127 exit_tag = False 128 continue 129 if serial in good: 130 number = input('请输入购买的商品个数：').strip() 131 if number.isdigit(): 132 goods_name = list(good[serial])[0] 133 goods_price = good[serial][goods_name] 134 print('你选择购买的商品为：%s 单价为：%s 购买个数为： %s' %(goods_name,goods_price,number)) 135 shoping_list.append((goods_name,goods_price,number)) 136 goods_sum = int(goods_price)*int(number) 137 salary_balance -= goods_sum 138 if salary_balance < 0: 139 print('你的账户余额不足，退出!') 140 exit_tag = False 141 continue 142 else: 143 continue 144 else: 145 print('商品个数必须为数字：') 146 else: 147 print('请输入正确的商品编号： ') 148 print('你的购物清单为%s \n' %(shoping_list)) 149 else: 150 print('你输入的密码不对，请重新输入！') 151 count += 1 152 if count > 2: 153 print('你尝试的次数过多，请稍后再试！') 154 exit_tag =False 155 continue