day2:购物车程序

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 
 4 salary=input("请输入工资： ")
 5 if salary.isdigit():
 6     salary=int(salary)
 7 price_recard=[]
 8 price_recard=[salary]
 9 while True:
10     f = open("shop_list", "r")
11     lines=f.readlines()
12     print("-----------商品列表-----------")
13     for line in lines:
14         print(line)
15     num=input("请输入购买商品的编号 余额查询：p 购物记录：w >>>")
16     if num.isdigit():
17         num=int(num)
18         if num <=int(len(lines)) and num >0:
19             for line in lines:
20                 if len(line)==0:break
21                 if num == int(line.split()[0]):
22                     price=int(line.split()[2])
23                     product=line.split()[1]
24             if salary >=price:
25                     salary -=price
26                     s=open("recard.txt","a")
27                     s.write("添加商品%s %s元的到你的购物车\n" % (product,price))
28                     s.flush()
29                     print("添加商品%s %s元的到你的购物车，账号余额%s元" % (product,price,salary))
30                     f.close()
31                     price_recard=[salary]
32             else:
33                 print("余额不足!当前余额为%s"  %(salary))
34                 f.close()
35         else:
36             print("商品不存在")
37             f.close()
38     elif num=="q":
39         n=open("recard.txt","r+")
40         lines=n.readlines()
41         while True:
42             for line in lines:
43                 #if len(line)==0:break
44                 print(line)
45             break
46             n.close()
47             f.close()
48             n = open("recard.txt", "w")
49             n.truncate();
50             n.close()
51         for i in price_recard:
52             #if len(i)==0:break
53             print("您账户余额为%s元" %i)
54         f=open("recard.txt","w+")
55         f.close()
56         print("----再见----")
57         exit()
58     elif num=="w":
59         n=open("recard.txt","r")
60         lines=n.readlines()
61         while True:
62             for line in lines:
63                 if len(line)==0:break
64                 print(line)
65             break
66 
67     elif num=="p":
68         for i in price_recard:
69             print("您账户余额为%s元" % i)