1 #!/usr/bin/env python
2 # -*- coding:utf-8 -*-
3 #Author:SKING
4
5 """
6 题目：购物车
7 1.启动程序后，让用户输入工资，然后打印商品列表。
8 2.允许用户根据商品编号购买商品。
9 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。
10 4.可随时退出，退出时，打印已购买商品和余额。
11
12 """
13
14 import sys, os, time, string
15
16 def commodity_list():
17 """打印商品列表"""
18 with open('commodity_list.txt', 'r') as file_commodity_list: # 打开商品列表文件commodity_list.txt
19 for commodity_list in file_commodity_list:
20 # 处理商品列表，并分别将序号、商品名称、商品价格、数量赋值给变量(serial_num, commdity_name, commodity_price, commdity_num)
21 (serial_num, commdity_name, commodity_price, commdity_num) = commodity_list.strip().split('\t')
22 dict_commodity_list.update({serial_num: (commdity_name, commodity_price, commdity_num)}) # 将商品列表存在字典里
23 # 打印商品列表
24 print(f'{serial_num.ljust(5)}\t{commdity_name.ljust(20)}\t{commodity_price.ljust(8)}\t{commdity_num.ljust(5)}')
25 return dict_commodity_list
26
27
28 count = 0 #记录用户输入工资的次数
29 dict_commodity_list = {} #存放商品列表的字典
30 count_buy = 0 # 统计已买的商品数量
31 price_buy = 0 # 统计已买的商品总价
32
33 serial_num_count = [] # 存放已购商品的序号，也就是字典dict_commodity_list的key
34 buy_num = 0 #结算的时候打印已购商品的序列号
35
36
37 while count<5:
38 count += 1
39 if count == 5: #如果用户输入次数超过5次，就提示休息5s
40 print('You have input too many times!')
41 print('Please wait 5s...')
42 for a in range(5,1,-1):
43 print(f'{a}s...')
44 time.sleep(1)
45 count = 0
46
47 salary = input('Please enter your salary:') #提示让让用户输入工资
48 if salary.isdigit(): #判断输入是否是数字
49 commodity_list()
50 Salary_balance = salary # 统计剩余的工资
51
52 else:
53 print('\n\nEnter wrong!try again!')
54 continue
55
56 while True:
57 #os.system('cls') # 清屏
58 print('Press "O" to settle accounts!')
59 commdity_serial_num = input('Enter the serial number("Q" to exit):') # 提示让用户输入想要购买的商品序号
60
61 if commdity_serial_num in dict_commodity_list.keys(): #判断输入是否是商品的列表序号
62 Salary_balance = 0
63 dict_commodity_list = commodity_list()
64 price_buy = price_buy + float(dict_commodity_list[commdity_serial_num][1]) # 已购商品价格总额
65 count_buy += 1 #统计已买商品数量
66 Salary_balance = int(salary) - price_buy #工资余额
67 serial_num_count.append(commdity_serial_num) #统计已购商品的序号，也就是字典dict_commodity_list的key
68 commodity_list()
69 print(f'Have buy commodities:{count_buy},\tSalary balance:{Salary_balance}\n\n')
70
71 else:
72 if commdity_serial_num == 'O' or commdity_serial_num == 'o':
73 #结算,显示已购商品、总价，剩余工资等信息
74 #os.system('cls') # 清屏
75 print('\nHave buy commdity list:')
76 for b in serial_num_count: #打印已购商品列表
77 buy_num += 1
78 print(f'\n{str(buy_num).ljust(5)}\t{dict_commodity_list[b][0].ljust(20)}\t{dict_commodity_list[b][1].ljust(8)}\t{dict_commodity_list[b][2].ljust(5)}\t')
79
80 print(f'\nBuy commdities:{count_buy}, total price:{price_buy}\n')
81 print(f'Salary balance:{Salary_balance}')
82 sys.exit(0)
83 elif commdity_serial_num == 'q' or commdity_serial_num == 'Q':
84 sys.exit(0)
85 else:
86 print('\nEnter wrong!try again!')
87 continue
