python入门 之购物车程序

# 1.启动程序后，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，检查余额是否足够，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

 1 product_list = [
 2     ('iphone', 5800),
 3     ('mac pro', 9800),
 4     ('bike', 800),
 5     ('watch', 10600),
 6     ('coffee', 31),
 7     ('book', 120),
 8 ]
 9 shopping_list = []
10 salary = input("Input your salary:")
11 if salary.isdigit():
12     salary = int(salary)
13     while True:
14         for index, itme in enumerate(product_list):
15             print(index, itme)
16         user_choice = input("选择要购买的商品：>>>")
17         if user_choice.isdigit():
18             user_choice = int(user_choice)
19             if len(product_list) > user_choice >= 0:
20                 p_itme = product_list[user_choice]
21                 if p_itme[1] <= salary:  # 钱够用
22                     shopping_list.append(p_itme)
23                     salary -= p_itme[1]
24                     print("Added \033[31;1m%s\033[0m into shopping cart, your current balance is \033[31;1m%s\033[0m" % (p_itme, salary))
25                 else:
26                     print("\033[41;1m你的余额只剩[%s]啦，还不买了]\033[0m" % salary)
27             else:
28                 print("produt code [%s] is not exist!" % user_choice)
29 
30         elif user_choice == 'q':
31             print("--------shopping list--------")
32             for p in shopping_list:
33                 print(p)
34             print("Your current balance:", salary)
35             exit()
36         else:
37             print("invalid potion")