【python之路】【2、编程基础】Python学习中的问题1

 1 #商店里的商品列表
 2 com = [
 3     ("iphone",5800),
 4     ("macbook",9000),
 5     ("coffee",320),
 6     ("pythonbook",80),
 7     ("bicyle",1500)
 8     ]
 9 shoplist = []#购物车变量
10 
11 salary = input("请输入您的预算：")#总共有5000改为可以选多少钱
12 if salary.isdigit():#验证
13     salary = int(salary)
14     yue = salary
15 
16     while yue >= 0: #形成一个无限循环
17 
18         for i, v in enumerate(com, 1):  # 打印商品内容
19             print(i, ‘>‘, v)
20         comd_num = input("输入商品编号（1...5）或退出（q）：")    #引导选择商品
21 
22         if comd_num.isdigit():  #验证输入是否合法
23             comd_num = int(comd_num)
24             if comd_num > 0 and comd_num <= len(com):
25                 p_com = com[comd_num-1] #将选择的商品选出来
26                 if p_com[1] < yue:
27                     yue -= p_com[1] # 买了要扣预算
28                     shoplist.append(p_com)
29                     print("购物车商品有：", shoplist)
30                     print("余额还有：", yue)
31                 else:
32                     print("购物车商品有：", shoplist) # 用户选商品编号，调用商品价格进行判断钱够不够
33                     print("您的余额不足！还有%s"%yue)
34             else:
35                 print("无此商品")
36         elif comd_num == "q":
37             print("-------------您已购买如下商品--------------")
38             for i in shoplist:
39                 if shoplist.count(i) >= 2:
40                     print(i,"*",shoplist.count(i))
41                 else:
42                     print(i)
43             print("--------------欢迎下次光临！---------------")
44             break
45         else:
46             print("非法字符")