基本数据类型编程练习一

  1 '''
  2 一、元素分类
  3 
  4 有如下值集合 [11,22,33,44,55,66,77,88,99,90...]，将所有大于 66 的值保存至字典的第一个key中，将小于 66 的值保存至第二个key的值中。
  5 即： {'k1': 大于66的所有值, 'k2': 小于66的所有值}
  6 '''
li = [11,22,33,44,55,66,77,88,99,90]
k1 = ''
k2 = ''
li = {}
for i in li:
    if i > 66:
        k1 = k1 + str(i)
    if i < 66:
        k2 = k2 + str(i)
li.update(k1 = '大于66的所有值',k2 = '小于66的所有值')
print(li)
print(k1,k2)

 20 '''
 21 二、查找
 22 查找列表中元素，移除每个元素的空格，并查找以 a或A开头 并且以 c 结尾的所有元素。
 23     li = ["alec", " aric", "Alex", "Tony", "rain"]
 24     tu = ("alec", " aric", "Alex", "Tony", "rain") 
 25     dic = {'k1': "alex", 'k2': ' aric',  "k3": "Alex", "k4": "Tony"}
 26 '''
li = ["alec", " aric", "Alex", "Tony", "rain"]
tu = ("alec", " aric", "Alex", "Tony", "rain")
dic = {'k1': "alex", 'k2': ' aric', "k3": "Alex", "k4": "Tony"}

new_dic = {}
for i in dic.keys():
    dic[i] = dic[i].strip()
    if (dic[i].startswith('a') or dic[i].startswith('A')) and dic[i].endswith('c'):
        new_dic.update(i=dic[i])
print(new_dic)
print(dic)

先将tuple转换为list，修改后，在转换回去
i = 0
new_tu = list(tu)
new_tu1 = []
while i < len(new_tu):
    new_tu[i] = new_tu[i].strip()
    if  (new_tu[i].startswith("a") or new_tu[i].startswith("A")) and new_tu[i].endswith("c"):
        new_tu1.append(new_tu[i])
    i += 1
print(tuple(new_tu))
print(tuple(new_tu1))


i = 0
new_li = []
# print(type(new_li))
while i < len(li):
    li[i] = li[i].strip()
    if (li[i].startswith("a") or li[i].startswith("A")) and li[i].endswith("c"):
        new_li.append(li[i])
    i += 1
print(li)
print(new_li)

 63 '''
 64 三、输出商品列表，用户输入序号，显示用户选中的商品
 65     商品 li = ["手机", "电脑", '鼠标垫', '游艇']
 66 '''
li = ["手机", "电脑", '鼠标垫', '游艇']
for k, v in enumerate(li, 1):
    print(k, v)
while True:
    s = int(input("输入商品序列号："))
    if s < len(li):
        print(li[s])
    else:
        print("没有该商品序列号")

 77 '''
 78 四、购物车
 79 goods = [
 80     {"name": "电脑", "price": 1999},
 81     {"name": "鼠标", "price": 10},
 82     {"name": "游艇", "price": 20},
 83     {"name": "美女", "price": 998},
 84 ]
 85 功能要求：
 86     要求用户输入总资产，例如：2000
 87     显示商品列表，让用户根据序号选择商品，加入购物车
 88     购买，如果商品总额大于总资产，提示账户余额不足，否则，购买成功。
 89     附加：可充值、某商品移除购物车
 90 '''
salary = int(input("输入您的总资产："))
goods = [
    {"name": "电脑", "price": 1999},
    {"name": "鼠标", "price": 10},
    {"name": "游艇", "price": 20},
    {"name": "美女", "price": 998},
]
i = 1
while i <= len(goods):
    print(i, '>>>', goods[i - 1]['name'])
    i += 1

shoping_car = []
while True:
    num = input('选择商品序列号[按q 退出]：')
    if num != 'q':
        num = int(num)
        if goods[num - 1]['price'] < salary:
            salary = salary - goods[num - 1]['price']
　　　　　　　　　 a = salary # 保存余额状态
            shoping_car.append(goods[num - 1]['name'])
        else:
            print("你的余额不足,请充值")
            salary = input('输入充值额度[按q 退出]:')
            if salary == 'q':
　　　　　　　　　　　　salary = a # 将余额状态赋值给salary
                break
            else:
                salary = int(salary)
            continue

    else:
        print('谢谢惠顾')
        break
print('你的余额:', salary)
print('购买的商品:', shoping_car)

'''
***************执行结果***************
输入您的总资产：2000
1 >>> 电脑
2 >>> 鼠标
3 >>> 游艇
4 >>> 美女
选择商品序列号[按q 退出]：1
选择商品序列号[按q 退出]：1
你的余额不足,请充值
输入充值额度[按q 退出]:1000
选择商品序列号[按q 退出]：4
选择商品序列号[按q 退出]：1
你的余额不足,请充值
输入充值额度[按q 退出]:q
你的余额: q
购买的商品: ['电脑', '美女']
'''

145 '''
146 五、用户交互，显示省市县三级联动的选择
147 dic = {
148     "河北":{
149         "石家庄" :["鹿泉","藁城","元氏"],
150         "邯郸" : ["永年","涉县","磁县"]
151     },
152     "河南":{
153         "郑州":["巩义","登封","新密"],
154         "开封":["金明","鼓楼","通许"]
155     },
156     "山西":{
157         "太原":["古交","清徐","阳曲"],
158         "大同":["天镇","阳高","广灵"]
159     }
160 }
161 需求：
162     （1. 运行程序输出第一级菜单
163     （2. 选择一级菜单某项，输出二级菜单，同理输出三级菜单    
164     （4. 让用户选择是否要退出
165     （5. 有返回上一级菜单的功能
166 '''
dic = {
    "河北": {
        "石家庄": ["鹿泉", "藁城", "元氏"],
        "邯郸": ["永年", "涉县", "磁县"]
    },
    "河南": {
        "郑州": ["巩义", "登封", "新密"],
        "开封": ["金明", "鼓楼", "通许"]
    },
    "山西": {
        "太原": ["古交", "清徐", "阳曲"],
        "大同": ["天镇", "阳高", "广灵"]
    }
}
print("一级菜单".center(20, '-'))

current_layer = dic
parent_layer = []

while True:
    for k in current_layer:
        print('>>>>> ', k)
    menu = input('请选择[按q退出/按b返回上一级]:').strip()
    if len(menu) == 0: continue
    if menu != 'q':# 退出
        if menu in current_layer:
            if type(current_layer) == dict: #第三层是列表，在往下会出错，所以用if条件判断
                parent_layer.append(current_layer)
                current_layer = current_layer[menu]
            else:
                print('最后一层了'.center(20,'-'))
        elif menu == 'b':#返回
            if parent_layer:
                current_layer = parent_layer.pop()
                if current_layer == dic:
                    print('这是第一层了'.center(20,'-'))
        else:
            print('重新输入'.center(20,'-'))
    else:
        break