day4作业

练习题

一、元素分类

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。
即： {‘k1‘: 大于66的所有值, ‘k2‘: 小于66的所有值}

二、查找

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。

li = ["alec", " aric", "Alex", "Tony", "rain"]

tu = ("alec", " aric", "Alex", "Tony", "rain")

dic = {‘k1‘: "alex", ‘k2‘: ‘ aric‘,  "k3": "Alex", "k4": "Tony"}

三、输出商品列表，用户输入序号，显示用户选中的商品

商品 li = ["手机", "电脑", ‘鼠标垫‘, ‘游艇‘]

四、购物车

功能要求：

• 要求用户输入总资产，例如：2000
• 显示商品列表，让用户根据序号选择商品，加入购物车
• 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。
• 附加：可充值、某商品移除购物车

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 五、用户交互，显示省市县三级联动的选择

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答案：

#!usr/bin/evn python
# -*- coding:utf-8 -*-
#1
dic={‘k1‘:[],‘k2‘:[]}
li=[11,22,33,44,55,66,77,88,99,90]
for i in li:
    if i>=66:
        dic[‘k1‘].append(i)
    else:
        dic[‘k2‘].append(i)
print(dic)

#2

li = ["aleb", " aric", "Alex", "Tony", "rain"]

tu = ("alec", " aric", "Alex", "Tony", "rain")

dic = {‘k1‘: "alex", ‘k2‘: ‘ aric‘, "k3": "Alex", "k4": "Tony"}

for i in li:
    a=i.strip()
    if (a.startswith(‘a‘) or a.startswith(‘A‘)) and a.endswith(‘c‘):
        print(a)
for j in tu:
    b=j.strip()
    if b.startswith(‘a‘) or b.startswith(‘A‘) and b.endswith(‘c‘):
        print(‘b-‘+b)

for v in dic.values():

    d=v.strip()
    #print(d,‘-‘)
    if (d.startswith(‘a‘) or b.startswith(‘A‘)) and b.endswith(‘c‘):
        print(‘d-‘+d)

#3

li = ["手机", "电脑", ‘鼠标垫‘, ‘游艇‘]
# a={}
# for i,j in enumerate(li,1):
#
#     a[i]=j
#
# num=int(input(‘blabla:‘))
#
# print(a[num])

for i, j in enumerate(li, 1):
    print(i, j)
while 1:

    num = int(input(‘blabla:‘))
    if num > 0 and num <= len(li):

        print(li[num - 1])

    else:
        print(‘null‘)

#4

total_money = int(input(‘请输入总金额:  ‘))

picked_car = []

picked_money = 0
goods = [

    {"name": "电脑", "price": 1999},

    {"name": "鼠标", "price": 10},

    {"name": "游艇", "price": 20},

    {"name": "美女", "price": 998},

]

goods_name = []
goods_name_price = {}
for i in goods:
    a = i[‘name‘]
    b = i[‘price‘]

    goods_name.append(a)
    # print(a)
    goods_name_price[a] = b
# print(goods_name_price)

for j, k in enumerate(goods_name, 1):
    print(j, k)
while 1:

    goods_num = input(‘请输入选中商品号，付款请输入【购买】：  ‘)
    try:
        goods_num = int(goods_num)
    except ValueError:
        goods_num = ‘购买‘
    try:
        picked_car.append(goods_name[goods_num - 1])
        picked_money += goods_name_price[goods_name[goods_num - 1]]
    except TypeError:
        pass
    print(picked_money)
    print(picked_car)

    if goods_num == ‘购买‘ and total_money >= picked_money:
        print(‘购买成功，谢谢惠顾‘)
        break
    elif goods_num == ‘购买‘ and total_money < picked_money:
        user_choice = input(‘您的资金不足，请【充值】或者【移除】购物车内一些商品：‘)
        if user_choice == ‘充值‘:
            print(‘当前余额：‘ + total_money)
            total_money += int(input(‘请输入总金额:  ‘))
            print(‘充值后金额：‘ + total_money)
            continue
        elif user_choice == ‘移除‘:
            while 1:
                print(picked_car)
                del_choice = input(‘请输入要移除的商品,完事后输出【ok】继续付款：‘)
                del picked_car[del_choice]
                print(picked_car)
                if del_choice == ‘ok‘:
                    break
                continue

#5

dic = {

    "河北": {

        "石家庄": ["鹿泉", "藁城", "元氏"],

        "邯郸": ["永年", "涉县", "磁县"],

    }
}

for i in dic:
    print(i)
    a=dic[i]
usip=str(input(‘输入省份: ‘))

for j in a:
    print(j)
    b=dic[i][j]

usip2=str(input(‘输入市: ‘))

for k in b:
    print(k)
usip2=str(input(‘输入县: ‘))