实验3

task 1

实验源码

import random

print('用列表存储随机整数： ')
lst = [random.randint(0, 100) for i in range(5)]
print(lst)

print('\n用集合存储随机整数: ')
s1 = {random.randint(0, 100) for i in range(5)}
print(s1)

print('\n用集合存储随机整数: ')
s2 = set()
while len(s2) < 5:
    s2.add(random.randint(0, 100))
print(s2)

运行结果截图

 

random.randint（0，100）生成的随机整数范围是0-100 可以取到100

list（range（5））生成的有序序列范围是 0-4，不包括5；list（range（1，5））生成的有序数列范围是1-4，不包括5

如果使用line8 生成集合s1，len（s1）不一定为5，若生成随机数时，产生了相同的元素，集合中只会有一个该元素。

使用line12-14 生成集合s2，len（s2）一定为5

task 2_1

实验源码

# 列表遍历
lst = [55, 92, 88, 79, 96]

# 遍历方法1： 使用while + 索引
i = 0
while i < len(lst):
    print(lst[i], end = ' ')
    i += 1

print()

# 遍历方法2： 使用for + 索引
for i in range(len(lst)):
    print(lst[i], end = ' ')
print()

# 遍历方法3： 使用for...in
for i in lst:
    print(i , end = ' ')
print()

运行结果截图

task 2_2

实验源码

# 字典遍历
book_info = {'isbn': '978-7-5356-8297-0',
             '书名': '白鲸记',
             '作者': '克里斯多夫.夏布特',
             '译者': '高文婧',
             '出版社': '湖南美术出版社',
             '售价': 82
             }

# 遍历key-value对： 实现方式1
for key, value in book_info.items():
    print(f'{key}: {value}')
print()

# 遍历key-value对： 实现方法2
for item in book_info.items():
    print(f'{item[0]}: {item[1]}')
print()

# 遍历值: 实现方法1
for value in book_info.values():
    print(value, end = ' ')
print()

运行结果截图

task 2_3

实验源码

 

book_infos = [{'书名': '昨日的世界', '作者': '斯蒂芬.茨威格'},
              {'书名': '局外人', '作者': '阿尔贝.加缪'},
              {'书名': '设计中的设计', '作者': '原研哉'},
              {'书名': '万历十五年', '作者': '黄仁宇'},
              {'书名': '刀锋', '作者': '毛姆'}
             ]
n=1
for i in book_infos:
        print(n,'.''《'+i['书名']+'》',i['作者'])
        n=n+1

 

运行结果截图

 

 

task 3

实验源码

text  = '''The Zen of Python, by Tim Peters

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!
'''

text = text.lower()
freq = {}

for char in text:

    if char.isalpha():

        if char in freq:

            freq[char] += 1

        else:

            freq[char] = 1

for char, count in sorted(freq.items(), key=lambda x: x[1], reverse=True):

    print(char, count)

运行结果截图

task 4

实验源码

title='专业学号信息'
print(title.center(50,'-'))
code_majors={8326:'地信类',8329:'计算机类',8330:'气科类',8336:'防灾工程',8345:'海洋科学',8382:'气象工程'}
for key,value in code_majors.items():
    print(f'{key}:{value}')

while True:
    id = input('请输入学号：')
    if id=='#':
        print('查询结束...')
        break
    major = int(id[4:8])
    if major in code_majors.keys():
        print(f'专业是：{code_majors[major]}')
    else:
        print('不在这些专业中...')

运行结果截图

task 5

实验源码

import random
x0 = random.randint(1,31)
print('猜猜2023年5月哪一天会是你的lucky day：~')
x  = int(input('你有三次机会，猜吧（1-31）：'))
if x == x0:
    print('哇，中了')
else:
    for i in range(2):
        if x > x0:
            print('猜晚了，你的lucky day 已经过啦')
            x  = int(input('再猜（1-31）:'))
        elif x < x0:
            print('猜早了，你的lucky day还没到呢')
            x  = int(input('再猜（1-31）:'))
        else:
            print('哇，猜中了~')
            break
    else:
        print('哇哦，次数用光了')
        print('偷偷告诉你，五月你的lucky day 是',x0,'号''good luck')

运行结果截图

task 6

实验源码

datas = {'2049777001': ['篮球', '羽毛球', '美食', '漫画'],
         '2049777002': ['音乐', '旅行'],
         '2049777003': ['马拉松', '健身', '游戏'],
         '2049777004': [],
         '2049777005': ['足球', '阅读'],
         '2049777006': ['发呆', '闲逛'],
         '2049777007': [],
         '2049777008': ['书法', '电影'],
         '2049777009': ['音乐', '阅读', '电影', '漫画'],
         '2049777010': ['数学', '推理', '音乐', '旅行']
         }
dict={}
for k in datas.values():
    for i in k:
       dict[i] = dict.get(i, 0) + 1
a=sorted(dict.items(),key=lambda x:x[1],reverse=True)
for key,value in a:
    print(f'{key}:{value}')

运行结果截图

task 7_1

实验源码

#欢迎信息
print('欢迎使用家用电器销售系统！')
#商品数据初始化
products=[
    ['0001','电视机','海尔',5999.00,20],
    ['0002','冰箱','西门子',6998.00,15],
    ['0003','洗衣机','小天鹅',1999.00,10],
    ['0004','空调','格力',3900.00,0],
    ['0005','热水器','格力',688.00,30],
    ['0006','笔记本','联想',5699.00,10],
    ['0007','微波炉','苏泊尔',480.00,33],
    ['0008','投影仪','松下',1250.00,12],
    ['0009','吸尘器','飞利浦',999.00,9],
]


#初始化用户购物车
products_cart = []

option = input('请选择您的操作：1-查看商品；2-购物；3—查看购物车；其他-结账')

while option in['1','2','3']:
    if option == '1':
        #产品信息列表
        print('产品和价格信息如下:')
        print('************************************************')
        print('%-10s'%'编号','%-10s'%'名称','%-10s'%'品牌','%-10s'%'价格','%-10s'%'库存数量')
        print('-------------------------------------------------')
        for i in range(len(products)):
            print('%-10s'%products[i][0],'%-10s'%products[i][1],'%-10s'
            %products[i][2],
            '%10.2f'%products[i][3],
            '%10d'%products[i][4])
        print('-------------------------------------------------')
    elif option == '2':
        product_id = input('请输入您要购买的产品编号：')
        while product_id not in [item[0] for item in products]:
            product_id = input('编号不存在，请重新输入您要购买的产品编号：')

        count = int(input('请输入您要购买的产品数量：'))
        while count>products[int(product_id)-1][4]:
            count=int(input('数量超出库存，请重新输入您要购买的产品数量：'))
        #将所购买的商品加入购物车
        if product_id not in [item[0] for item in products_cart]:
            products_cart.append([product_id,count])
        else:
            for i in range(len(products_cart)):
                if products_cart[i][0] == product_id:
                    products_cart[i][1]+=count
        #更新商品列表
        for i in range(len(products)):
            if products[i][0] == product_id:
                products[i][4] -= count
    else:
        print('购物车信息如下：')
        print('*************************************')
        print('%-10s'%'编号','%-10s'%'购买数量')
        print('-------------------------------------')
        for i in range(len(products_cart)):
            print('%-10s'%products_cart[i][0],'%6d'%products_cart[i][1])
        print('-------------------------------------')
    option = input('操作成功！请选择你的操作：1-查看商品；2-购物；3-查看购物车；其他-结账')
#计算金额
if len(products_cart)>0:
    amount = 0
    for i in range(len(products_cart)):
        product_index = 0
        for j in range(len(products)):
            if products[j][0] == products_cart[i][0]:
                product_index = j
                break
        price = products[product_index][3]
        count = products_cart[i][1]
        amount+=price*count

    if 5000<amount<=10000:
        amount = amount * 0.95
    elif 10000<amount<=20000:
        amount = amount * 0.90
    elif amount > 20000:
        amount = amount*0.85
    else:
        amount = amount*1
    print('购买成功，您需要支付%8.2f元'%amount)

#退出系统
print('谢谢您的光临，下次再见！')

运行结果截图

task 7_2

实验源码

#欢迎信息
print('欢迎使用家用电器销售系统！')
#商品数据初始化
products=[
    ['0001','电视机','海尔',5999.00,20],
    ['0002','冰箱','西门子',6998.00,15],
    ['0003','洗衣机','小天鹅',1999.00,10],
    ['0004','空调','格力',3900.00,0],
    ['0005','热水器','格力',688.00,30],
    ['0006','笔记本','联想',5699.00,10],
    ['0007','微波炉','苏泊尔',480.00,33],
    ['0008','投影仪','松下',1250.00,12],
    ['0009','吸尘器','飞利浦',999.00,9],
]


#初始化用户购物车
products_cart = []

option = input('请选择您的操作：1-查看商品；2-购物；3—查看购物车；其他-结账')

while option in['1','2','3']:
    if option == '1':
        #产品信息列表
        print('产品和价格信息如下:')
        print('************************************************')
        print(print('{:<10}'.format('编号'),'{:<10}'.format('名称'),'{:<10}'.format('品牌'),'{:<10}'.format('价格'),'{:<10}'.format('库存数量')))
        print('-------------------------------------------------')
        for i in range(len(products)):
            print('{:<10}'.format(products[i][0]),'{:<10}'.format(products[i][1]),'{:<10}'.format
            (products[i][2]),
            '{:<10}'.format(products[i][3]),
            '{:<10}'.format(products[i][4]))
        print('-------------------------------------------------')
    elif option == '2':
        product_id = input('请输入您要购买的产品编号：')
        while product_id not in [item[0] for item in products]:
            product_id = input('编号不存在，请重新输入您要购买的产品编号：')

        count = int(input('请输入您要购买的产品数量：'))
        while count>products[int(product_id)-1][4]:
            count=int(input('数量超出库存，请重新输入您要购买的产品数量：'))
        #将所购买的商品加入购物车
        if product_id not in [item[0] for item in products_cart]:
            products_cart.append([product_id,count])
        else:
            for i in range(len(products_cart)):
                if products_cart[i][0] == product_id:
                    products_cart[i][1]+=count
        #更新商品列表
        for i in range(len(products)):
            if products[i][0] == product_id:
                products[i][4] -= count
    else:
        print('购物车信息如下：')
        print('*************************************')
        print('{:<10}'.format('编号'),'{:<10}'.format('购买数量'))
        print('-------------------------------------')
        for i in range(len(products_cart)):
            print('{:<10}'.format(products_cart[i][0]),'{:<6}'.format(products_cart[i][1]))
        print('-------------------------------------')
    option = input('操作成功！请选择你的操作：1-查看商品；2-购物；3-查看购物车；其他-结账')
#计算金额
if len(products_cart)>0:
    amount = 0
    for i in range(len(products_cart)):
        product_index = 0
        for j in range(len(products)):
            if products[j][0] == products_cart[i][0]:
                product_index = j
                break
        price = products[product_index][3]
        count = products_cart[i][1]
        amount+=price*count

    if 5000<amount<=10000:
        amount = amount * 0.95
    elif 10000<amount<=20000:
        amount = amount * 0.90
    elif amount > 20000:
        amount = amount*0.85
    else:
        amount = amount*1
    print('购买成功，您需要支付{:.2f}元'.format(amount))

#退出系统
print('谢谢您的光临，下次再见！')

运行结果截图

task 8_1

实验源码

#欢迎信息
print('欢迎使用家用电器销售系统！')
#商品数据初始化
products=[
    {'id':'0001','name':'电视机','brand':'海尔','price':5999.00,'count':20},
    {'id':'0002','name':'冰箱','brand':'西门子','price':6998.00,'count':15},
    {'id':'0003','name':'洗衣机','brand':'小天鹅','price':1999.00,'count':10},
    {'id':'0004','name':'空调','brand':'格力','price':3900.00,'count':0},
    {'id':'0005','name':'热水器','brand':'格力','price':688.00,'count':30},
    {'id':'0006','name':'笔记本','brand':'联想','price':5699.00,'count':10},
    {'id':'0007','name':'微波炉','brand':'苏泊尔','price':480.00,'count':33},
    {'id':'0008','name':'投影仪','brand':'松下','price':1250.00,'count':12},
    {'id':'0009','name':'吸尘器','brand':'飞利浦','price':999.00,'count':9},
]


#初始化用户购物车
products_cart = []

option = input('请选择您的操作：1-查看商品；2-购物；3—查看购物车；其他-结账')

while option in['1','2','3']:
    if option == '1':
        #产品信息列表
        print('产品和价格信息如下:')
        print('************************************************')
        print('%-10s'%'编号','%-10s'%'名称','%-10s'%'品牌','%-10s'%'价格','%-10s'%'库存数量')
        print('-------------------------------------------------')
        for i in range(len(products)):
            print('%-10s'%products[i]['id'],'%-10s'%products[i]['name'],
            (products[i]['brand']),
            '%-10.2f'%products[i]['price'],
            '%-10d'%products[i]['count'])
        print('-------------------------------------------------')
    elif option == '2':
        product_id = input('请输入您要购买的产品编号：')
        while product_id not in [item['id'] for item in products]:
            product_id = input('编号不存在，请重新输入您要购买的产品编号：')

        count = int(input('请输入您要购买的产品数量：'))
        while count>products[int(product_id)-1]['count']:
            count=int(input('数量超出库存，请重新输入您要购买的产品数量：'))
        #将所购买的商品加入购物车
        if product_id not in [item['id'] for item in products_cart]:
            products_cart.append({'id':product_id,'count':count})
        else:
            for i in range(len(products_cart)):
                if products_cart[i].get('id') == product_id:
                    products_cart[i]['count']+=count
        #更新商品列表
        for i in range(len(products)):
            if products[i]['id'] == product_id:
                products[i]['count'] -= count
    else:
        print('购物车信息如下：')
        print('*************************************')
        print('%-10s'%'编号','%-10s'%'购买数量')
        print('-------------------------------------')
        for i in range(len(products_cart)):
            print('%-10s'%products_cart[i]['id'],'%6d'%products_cart[i]['count'])
        print('-------------------------------------')
    option = input('操作成功！请选择你的操作：1-查看商品；2-购物；3-查看购物车；其他-结账')
#计算金额
if len(products_cart)>0:
    amount = 0
    for i in range(len(products_cart)):
        product_index = 0
        for j in range(len(products)):
            if products[j]['id'] == products_cart[i]['id']:
                product_index = j
                break
        price = products[product_index]['price']
        count = products_cart[i]['count']
        amount+=price*count

    if 5000<amount<=10000:
        amount = amount * 0.95
    elif 10000<amount<=20000:
        amount = amount * 0.90
    elif amount > 20000:
        amount = amount*0.85
    else:
        amount = amount*1
    print('购买成功，您需要支付{:.2f}元'.format(amount))

#退出系统
print('谢谢您的光临，下次再见！')

运行结果截图

task 8_2

实验源码

#欢迎信息
print('欢迎使用家用电器销售系统！')
#商品数据初始化
products=[
    {'id':'0001','name':'电视机','brand':'海尔','price':5999.00,'count':20},
    {'id':'0002','name':'冰箱','brand':'西门子','price':6998.00,'count':15},
    {'id':'0003','name':'洗衣机','brand':'小天鹅','price':1999.00,'count':10},
    {'id':'0004','name':'空调','brand':'格力','price':3900.00,'count':0},
    {'id':'0005','name':'热水器','brand':'格力','price':688.00,'count':30},
    {'id':'0006','name':'笔记本','brand':'联想','price':5699.00,'count':10},
    {'id':'0007','name':'微波炉','brand':'苏泊尔','price':480.00,'count':33},
    {'id':'0008','name':'投影仪','brand':'松下','price':1250.00,'count':12},
    {'id':'0009','name':'吸尘器','brand':'飞利浦','price':999.00,'count':9},
]


#初始化用户购物车
products_cart = []

option = input('请选择您的操作：1-查看商品；2-购物；3—查看购物车；其他-结账')

while option in['1','2','3']:
    if option == '1':
        #产品信息列表
        print('产品和价格信息如下:')
        print('************************************************')
        print(print('{:<10}'.format('编号'),'{:<10}'.format('名称'),'{:<10}'.format('品牌'),'{:<10}'.format('价格'),'{:<10}'.format('库存数量')))
        print('-------------------------------------------------')
        for i in range(len(products)):
            print('{:<10}'.format(products[i]['id']),'{:<10}'.format(products[i]['name']),'{:<10}'.format
            (products[i]['brand']),
            '{:<10}'.format(products[i]['price']),
            '{:<10}'.format(products[i]['count']))
        print('-------------------------------------------------')
    elif option == '2':
        product_id = input('请输入您要购买的产品编号：')
        while product_id not in [item['id'] for item in products]:
            product_id = input('编号不存在，请重新输入您要购买的产品编号：')

        count = int(input('请输入您要购买的产品数量：'))
        while count>products[int(product_id)-1]['count']:
            count=int(input('数量超出库存，请重新输入您要购买的产品数量：'))
        #将所购买的商品加入购物车
        if product_id not in [item['id'] for item in products_cart]:
            products_cart.append({'id':product_id,'count':count})
        else:
            for i in range(len(products_cart)):
                if products_cart[i].get('id') == product_id:
                    products_cart[i]['count']+=count
        #更新商品列表
        for i in range(len(products)):
            if products[i]['id'] == product_id:
                products[i]['count'] -= count
    else:
        print('购物车信息如下：')
        print('*************************************')
        print('{:<10}'.format('编号'),'{:<10}'.format('购买数量'))
        print('-------------------------------------')
        for i in range(len(products_cart)):
            print('{:<10}'.format(products_cart[i]['id']),'{:<6}'.format(products_cart[i]['count']))
        print('-------------------------------------')
    option = input('操作成功！请选择你的操作：1-查看商品；2-购物；3-查看购物车；其他-结账')
#计算金额
if len(products_cart)>0:
    amount = 0
    for i in range(len(products_cart)):
        product_index = 0
        for j in range(len(products)):
            if products[j]['id'] == products_cart[i]['id']:
                product_index = j
                break
        price = products[product_index]['price']
        count = products_cart[i]['count']
        amount+=price*count

    if 5000<amount<=10000:
        amount = amount * 0.95
    elif 10000<amount<=20000:
        amount = amount * 0.90
    elif amount > 20000:
        amount = amount*0.85
    else:
        amount = amount*1
    print('购买成功，您需要支付{:.2f}元'.format(amount))

#退出系统
print('谢谢您的光临，下次再见！')

运行结果截图