开发笔记:购物车程序优化（python3.x）

1 products_list=[]
2 shopping_list=[]
3 price_list=[]
4 while True:
5 role=input("请选择你以什么样的身份进入系统 1.user| 2.ower：")
6 if role==‘1‘:
7 print ("欢迎使用user身份进入系统")
8 with open("code_file/product_info",‘r‘) as h:
9 f=len(h.readlines() )
10 with open("code_file/product_info",‘r‘) as u:
11 for i in range(f):
12 single_produce=u.readline().strip(‘
‘)
13 products_list.append(single_produce)
14 with open("code_file/price_info",‘r‘) as m:
15 for i in range(f):
16 single_price=int(m.readline().strip(‘
‘))
17 price_list.append(single_price)
18 salary=input("input your salary:")
19 if salary.isdigit():
20 salary=int(salary)
21 while True:
22 for index,item in enumerate (products_list ):
23 print(index,item,price_list[index] )
24 choose_num=input("plese your choose...:")
25 if choose_num.isdigit():
26 choose_num=int(choose_num )
27 if choose_num=0:
28 if salary>=price_list[choose_num]:
29 shopping_list.append(products_list[choose_num])
30 p=products_list[choose_num]
31 salary-=price_list[choose_num]
32 print("added 33[31;1m%s33[0m into your shopcar...,your balance is 33[31;1m%s33[0m" % (p,salary ))
33 else:
34 print("your salary can not afford it....")
35 else:
36 print("now,your choose is false....")
37 elif choose_num=="q":
38 with open("code_file/bought_info",‘a+‘) as bought:
39 for bought_products in shopping_list :
40 bought.writelines(bought_products)
41 bought.writelines(‘
‘)
42 print (bought_products )
43 with open("code_file/balance_info",‘w‘) as balance:
44 balance.writelines(str(salary))
45 balance.writelines(‘
‘)
46 print("your balance is 33[31;1m%s33[0m"%salary)
47 exit()
48 elif choose_num==‘b‘:
49 break
50 else:
51 print("your input is false....,plese input agin...")
52
53 elif role==‘2‘:
54 print ("欢迎你使用商家身份进入系统")
55 while True:
56 print (‘‘‘商家可以进行的操作信息
57 0.添加商品
58 1.修改价格
59 2.读取商品的信息
60 ‘‘‘)
61 next=input("请输入你的选择：")
62 if next.isdigit():
63 next=int(next)
64 if next==0:
65 join_product=input("请输入添加的商品名称：")
66 join_price=input("请输入添加的商品价格：")
67 with open("code_file/product_info",‘a+‘) as o:
68 o.writelines(join_product)
69 o.writelines(‘
‘)
70 with open("code_file/price_info",‘a+‘) as a:
71 a.writelines(join_price)
72 a.writelines(‘
‘)
73 continue
74 elif next==1:
75 change_name=input("请输入需要修改的商品名称：")+‘
‘
76 change_price=input("请输入该商品修改为多钱:")+‘
‘
77 with open("code_file/price_info",‘r+‘)as o:
78 read_price=o.readlines()
79 print(read_price)
80 read_price[products_list.index(change_name)] =change_price
81 print(read_price)
82 with open("code_file/price_info",‘w+‘)as q:
83 q.writelines(read_price)
84 elif next==2:
85 with open("code_file/product_info",‘r‘)as b:
86 products_list =b.readlines()
87 for index,item in enumerate (products_list ):
88 print(index,item)
89 elif next==‘b‘:
90 break
91 elif next==‘q‘:
92 exit()
93 else:
94 print("输入错误")
95 elif role==‘q‘:
96 exit()
97 else:
98 print("输入异常")