三级菜单

三级菜单：
1. 运行程序输出第一级菜单
2. 选择一级菜单某项，输出二级菜单，同理输出三级菜单
3. 菜单数据保存在文件中

# 创造三级菜单
shoppingmall = {'clothes':{'skirt':['s', 'm', 'l'], 'shikt':['s', 'm', 'l'], 'coat':['s', 'm', 'l'],},
                'phone':{'Apple':['5', '6', '7'], 'Xiaomi':['1', '2', '3'], 'Huawei':['6', '7', '8']},
                'friut':{'apple':['1kg','2kg','3kg'],'pear':['1kg','2kg','3kg'], 'banana':['1kg','2kg','3kg']}}
list1=[]
list2=[]

# 打印一级菜单
total_count = 0
for x in range(3):
    count = 0
    for i in range(3):
        for key in shoppingmall:
            print(key)
            list1.append(key)
# 选择一项到下一级菜单或者退出
        choose = input('Please chose thing or q = quit:')
        if choose == 'q':
            exit('Bye!')
# 进入下一级菜单
        elif choose in list1:
            a = shoppingmall.get(choose)
            count1 = 0
            for y in range(3):
                for key1 in a:
                    print(key1)
                    list2.append(key1)

        # 选择一项到下一级菜单或者退出或返回
                choose1 = input('Please chose that you want or q = quit or b = back :')
                if choose1 == 'q':
                    exit('Bye!')

                elif choose1 == 'b':
                    count += 1
                    break
                    if count == 3:  # 选择不能超过三次
                        print('Sorry, your choose is over the limit.')
                elif choose1 in list2:
                # 进入下一级菜单
                    b = a.get(choose1)
                    for key2 in b:
                        print(key2)
    # 选择退出，返回上一级菜单 或者第一个菜单
                    choose2 = input('Please chose that q = quit or b = back or 1st = the first list')
                    if choose2 == 'q':
                        exit('Bye!')
                    elif choose2 == 'b':
                        count1 += 1

                        if count1 == 3:
                            print('Sorry, your choose is over the limit.')
                            break
                    elif choose2 == '1st':

                        total_count += 1
                        break

                        if total_count == 3:
                            print('Sorry, your choose is over the limit.')
                    else:
                        print('Sorry, your choose not in list! Please choose again')
                else:
                    print('Sorry, your choose not in list!Please choose again')
        else:
            print('Sorry, your choose not in list! Please choose again') #选择物品不在名单里