shopping

草稿，明天回公司写 
#!/usr/bin/env python

goods = {'IPhone7':6000,'Mate8':5000,'Thinkpad':3000,'Mac':'8000'}
hea = {'商品信息':'价格'}
msg = ' Welcome to JD '
msg_we = msg.center(100,'#')
money = 10000
shoplist = []
buyshoplist = []
shopmoneylist = []
print(msg_we)
print("您账户余额为:%s" %money)
for k1,v1 in hea.items():
    print(k1,v1)
for k,v in goods.items():
    print(k,v)
    shoplist.append(k)



print("购物车内的商品为",buyshoplist)
while True:
    shoplist1 = input("输入买的商品：")
    if shoplist1 in shoplist:
        print('您已成功购买商品',shoplist1)
        buyshoplist.append(shoplist1)
        print("购物车内的商品为",buyshoplist)
        shopmoney = int(goods[shoplist1])
        shopmoneylist.append(shopmoney)
        print("价格总额为：",sum(shopmoneylist))
#        print("价格总数为：",buymoneylist)
    else:
        choise = input("输入错误，是否结账退出（Y）es 结账退出，(N)o返回继续购买")
        if choise.capitalize() =='Y':
            if sum(shopmoneylist) > money:
                c = input("余额不足，充值（Y）es,减少商品(R)emove")
                if c.capitalize() == 'Y':
                    m = int(input("输入充值金额："))
                    money += m
                    print(money)
                if c.capitalize() == "R":
                    pass
            else:
                break

#        print(choise)
#        if choise.capitalize() == 'Y':




#    continue

周末的调试，功能不全，留作修改和思路用

购物车功能几乎实现了贴出 第二个修改版，环境Centos python3

按照流程图写，最后写着写着跑偏了一点，流程图如下

 1 [root@trs python3]# vim shopping2.py 
 2 
 3 #!/usr/bin/env  python
 4 #author:lihongxing
 5 #功能：在Python3中对购物车的实现，购买商品，结账金额大于帐户余额则提示充值或者减少商品，最后结算
 6 #日期：2016/1/26
 7 
 8 #导入sys模块
 9 import sys
10 
11 #定义变量信息
12 goods = {'IPhone7':6000,'Mate8':5000,'Thinkpad':3000,'Mac':'8000'}
13 hea = {'商品信息':'价格'}
14 msg = ' Welcome to JD '
15 msg_we = msg.center(60,'#')
16 money = 10000
17 loop = True
18 
19 #调试时出错，于是定义了几个空列表
20 shoplist = []
21 buyshoplist = []
22 buyremovlist = []
23 shopmoneylist = []
24 
25 #显示帐户余额欢迎信息
26 print(msg_we)
27 print("您账户余额为:%s" %money)
28 for k1,v1 in hea.items():
29     print(k1,v1)
30 
31 '''
32 把goods的字典内商品信息和价格for循环出然后增加到列表展示
33 提示：如果字典内的信息不做列表处理，下面while循环if判断时会有问题(结果会时对时错)
34 于是在上面把shoplist定义成了一个空列表
35 '''
36 for k,v in goods.items():
37     print(k,v)
38     shoplist.append(k)
39 print("购物车内的商品为",buyshoplist)
40 print(msg_we)
41 
42 
43 '''
44 while循环主程序，输入商品
45 如果输入的商品在shoplist内则打印出，并把输入的信息增加到buyshoplist内
46 把shoplist的key对应的value取出，并转成整型，依次把取整后的value添加到shopmoneylist中
47 计算总价格赋值到allmoney
48 如果输入Q||q则退出程序
49 如果输入的商品不再shoplist内则判断输入是否为Y||y
50 如果为y则判断allmoney是否大于账户余额
51 '''
52 while loop:
53     shoplist1 = input("输入要买的商品（按Q退出）按任意键结账:")
54     if shoplist1 in shoplist:
55         print('您已成功购买商品',shoplist1)
56         buyshoplist.append(shoplist1)
57         print("购物车内商品为",buyshoplist)
58         shopmoney = int(goods[shoplist1])
59         shopmoneylist.append(shopmoney)
60         allmoney = sum(shopmoneylist)
61         print("价格1总额为：",allmoney)
62     elif shoplist1.capitalize() == 'Q':
63         sys.exit()
64     else:
65         choise = input("输入错误，是否结账退出（Y）es 结账退出，(N)o返回继续购买")
66         if choise.capitalize() =='Y':
67             if allmoney > money:
68                 c = input("余额不足，充值（Y）es,减少商品(R)emove")
69                 if c.capitalize() == 'Y':
70                     m = int(input("输入充值金额："))
71                     money += m
72                     print(money)
73                 if c.capitalize() == "R":
74                     allmoney = 0                        #把购买总金额重新赋值为0，用于计算移除商>品后的总价格
75                     shopmoney = 0
76                     shopmoneylist = []
77                     print('购物车2内的商品为：' , buyshoplist)
78                     removeshop = input("请输入要减掉的商品名称：")
79                     buyshoplist.remove(removeshop)
80                     print(buyshoplist)
81                     for i in buyshoplist:
82                         shopmoney = int(goods[i])
83                         shopmoneylist.append(shopmoney)
84                         allmoney = sum(shopmoneylist)
85 
86                     print("价格2总额为：",allmoney)
87             else:
88                 print("您已消费",allmoney, '账户余额为',money - allmoney)
89                 break

 

以下为运行结果，更多人性化的设计还需修改

 

 

 

 

第三次修改，添加了第一天的登录验证功能，没有太多的改变，大致上就是把第一天的登录代码粘了进去。实践并明白了如何循环套循环在退出   break和continue的玩法，添加了flag但是好像不管用，就注释掉了，于是多用了几个break。如果不懂可以注释几个break运行一下便可

 

 

代码如下：

  1 #!/usr/bin/env python
  2 import sys
  3 
  4 name = input("Please Input your name:")
  5 passwd = "123"
  6 count = 0
  7 
  8 lock = open('lock.txt','r+')
  9 lockname = lock.readlines()
 10 
 11 
 12 
 13 goods = {'IPhone7':6000,'Mate8':5000,'Thinkpad':3000,'Mac':'8000'}
 14 hea = {'商品信息':'价格'}
 15 msg = ' Welcome to JD '
 16 msg_we = msg.center(60,'#')
 17 money = 10000
 18 loop = True
 19 
 20 shoplist = []
 21 buyshoplist = []
 22 buyremovlist = []
 23 shopmoneylist = []
 24 
 25 
 26 
 27 for locknamelines in lockname:
 28     locknamelines = locknamelines.strip('\n')
 29     if name == locknamelines:
 30         print("Account Be Locked!!Please Change User!")
 31         quit()
 32 lock.close()
 33 
 34 #boss = True
 35 
 36 while True:
 37     while count <3:
 38         userpasswd = input("Please Input your passwd:")
 39         if userpasswd == passwd:
 40             print(msg_we)
 41             print("您账户余额为:%s" %money)
 42             for k1,v1 in hea.items():
 43                 print(k1,v1)
 44             for k,v in goods.items():
 45                 print(k,v)
 46                 shoplist.append(k)
 47             print("购物车内的商品为",buyshoplist)
 48             print(msg_we)
 49             break
 50 
 51         else:
 52             print("Login falied,Please again ,Try", 3-count, 'times')
 53             count += 1
 54     else:
 55         
 56         lockinput = open('lock.txt','a')
 57         lockinputlist = lockinput.write(name + '\n')
 58         print("Name Be Locked,Please Change User")
 59         lockinput.close()
 60         quit()
 61     while loop:
 62         shoplist1 = input("输入要买的商品（按Q退出）按任意键结账:")
 63         if shoplist1 in shoplist:
 64             print('您已成功购买商品',shoplist1)
 65             buyshoplist.append(shoplist1)
 66             print("购物车内商品为",buyshoplist)
 67             shopmoney = int(goods[shoplist1])
 68             shopmoneylist.append(shopmoney)
 69             allmoney = sum(shopmoneylist)
 70             print("价格1总额为：",allmoney)
 71         elif shoplist1.capitalize() == 'Q':
 72             sys.exit()
 73         else:
 74             choise = input("输入错误，是否结账退出（Y）es 结账退出，(N)o返回继续购买")
 75             if choise.capitalize() =='Y':
 76                 if allmoney > money:
 77                     c = input("余额不足，充值（Y）es,减少商品(R)emove")
 78                     if c.capitalize() == 'Y':
 79                         m = int(input("输入充值金额："))
 80                         money += m
 81                         print(money)
 82                     if c.capitalize() == "R":
 83                         allmoney = 0
 84                         shopmoney = 0
 85                         shopmoneylist = []
 86                         print('购物车2内的商品为：' , buyshoplist)
 87                         removeshop = input("请输入要减掉的商品名称：")
 88                         buyshoplist.remove(removeshop)
 89                         print(buyshoplist)
 90                         for i in buyshoplist:
 91                             shopmoney = int(goods[i])
 92                             shopmoneylist.append(shopmoney)
 93                             allmoney = sum(shopmoneylist)
 94 
 95                         print("价格2总额为：",allmoney)
 96                 else:
 97                     print("您已消费",allmoney, '账户余额为',money - allmoney)
 98                     loop = False
 99 #                boss = False      
100     break
101 
102 
103 
104 
105 
106         
107