python 循环嵌套

需求如下:

  1.

 1 #定义商品列表类
 2 # def shangpin_list():
 3 #     for i in com_list:
 4 #         print(com_list.index(i),end="   ")
 5 #         for j in i:
 6 #             print(j,end="   ")
 7 #         print()
 8 #     else:
 9 #         return True
10 
11 #程序入口
12 
13 salary = int(input("请输入您的工资:"))
14 com_list = [['iphone6s',5000],['mac book',9000],['coffee',32],['python book',80]]
15 shopping_cart_list = [] #购物车
16 cum_money = [] #账单
17 car_list = []
18 com_count = 0
19 while True:
20     if salary >= 0:
21         for i in com_list:  #展示商品
22             print(com_list.index(i),end="   ")
23             for j in i:
24                 print(j,end="   ")
25             print()
26         gm = input('''想买点啥?
27 输入商品编号即可购买,输入quit退出商城。
28 请输入》》》''') #开始购物
29         if gm != 'quit':
30             try:
31                 gm = int(gm)
32                 salary = salary - int(com_list[gm][1])
33                 if salary >= 0:
34                     com = com_list[gm][0]   #购买的商品
35                     com_money = com_list[gm][1]
36                     shopping_cart_list.append([com,com_money])      #购买的商品
37                     com_count = com_count+com_money
38                     print('购买',com,'您需要支付',com_money,'元--->扣除后余额为:%d'%salary)
39                 else:
40                     print("余额不足,骚年快去挣钱吧!")
41             except ValueError or IndexError as err:
42                 print("输入有误呕!")
43         else:
44             print( '本次您购买了以下商品,共计花费:%d元'%com_count)
45             for ij in shopping_cart_list:
46                 print( '%s  %s元'%((ij[0]),ij[1]))
47             else:
48                 exit("您还有余额%d欢迎下次光临"%salary)
49     continue
购物车

 

 1 #!/user/bin/env python3
 2 # -*- coding=utf-8 -*-
 3 #__author__:gq
 4 #date:2016/8/24 0024
 5 
 6 dic = {'北京':{'昌平':['沙河','西二旗','西三旗'],'海淀':['圆明园']}, '河北':{'石家庄':['新华区'],'衡水':['老白干']},'广州':{'深圳':['华强北']}}
 7 # for index in dic.items():
 8 #     print(index)
 9 #一级菜单
10 def menu_1():
11     dic_01={}
12     while True:
13         print('一级菜单'.center(55,'#'))
14         for index,menu_name in enumerate(dic):
15             print(index,menu_name)
16             dic_01.setdefault(index,menu_name)
17         print(dic_01)
18         chose = input('输入菜单序号进入下级菜单,输入b反回上一级菜单')
19         if chose.isdigit():
20             chose = int(chose)
21             if dic_01.get(chose) == None:
22                 print('没有这%s这个菜单项,请重新输入!'%chose)
23                 continue
24             else:
25                 #print(dic_01.get(chose))
26                 menu_2(dic_01.get(chose))
27         elif chose == 'q':
28             print("程序退出")
29         else:
30             print("您的输入有误,请重新输入!")
31 
32 #二级菜单
33 def menu_2(name):
34     dic_2 = {}
35     while True:
36         flag = False
37         print("%s 二级菜单".center(55,'#')%name)
38         for index,menu in enumerate(dic[name]):
39             print(index,menu)
40             dic_2.setdefault(index,menu)
41         print(dic_2)
42         chose2 = input('输入菜单序号进入下级菜单,输入b反回上一级菜单,输入q退出')
43         if chose2.isdigit():            #判断用户输入的内容是否是数字样式
44             chose2 = int(chose2)
45             #print(dic_2.get(chose2))
46             if dic_2.get(chose2) == None:
47                 print('没有这%s这个菜单项,请重新输入!'%chose2)
48             else:
49                 print(dic_2.get(chose2))
50                 flag = menu_3(name,dic_2.get(chose2))
51                 if flag:
52                     return True
53                 else:
54                     continue
55         elif chose2 == 'q':         #用户输入‘q'则退出程序
56             print("程序退出")
57         elif chose2 == 'b':         #用户输入'b'则反回上级菜单
58             break
59         else:
60             print("您的输入有误,请重新输入!")
61 
62 #三级菜单
63 def menu_3(name1,name2):
64     dic_3 ={}
65     while True:
66         print('%s 三级菜单'.center(55,'#')%name2)
67         for index3,menu3 in enumerate(dic[name1][name2]):
68             print(menu3)
69             dic_3.setdefault(index3,menu3)
70         print(dic_3)
71         chose3 = input('输入b反回上一级菜单,输入m反回主菜单,输入q退出')
72         if chose3 == 'q':
73             print("程序退出")
74             exit()
75         elif chose3 == 'm':
76             return True
77         elif chose3 == 'b':
78             return False
79         else:
80             print("您的输入有误,请重新输入!")
81 
82 
83 while True:
84     menu_1()
三级菜单

 

 1 dic = {'北京':{'昌平':{'沙河':{},'回龙观':{},'巩华城':{}},
 2                '海淀':{'圆明园'}},
 3        '河北':{'石家庄':{'新华区'},
 4                '衡水':{'老白干'}},
 5        '广州':{'深圳':{'华强北'}}}
 6 dic1 = dic  
 7 parent_list=[]
 8 while True:
 9     for i in dic1:
10         print(i)
11     choose = input('>>>').strip()
12     if len(choose)==0:continue
13     if choose in dic1:
14         parent_list.append(dic1)
15         dic1 = dic1[choose]
16     elif choose == 'b':
17         if parent_list:
18             dic1 = parent_list.pop()
19     else:
20         print("无此项")
三级菜单进化版

 

posted @ 2016-08-24 19:03  noube  阅读(204)  评论(0编辑  收藏  举报