task1
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)
答案一：0~100，可以取到100
答案二：0~5，不包括5
1~5，不包括5
答案三：不是，因为可能有重复的元素，集合会自动去重。
答案四：是
task2.1
lst = [55, 92, 88, 79, 96]
i = 0
while i < len(lst):
print(lst[i], end = ' ')
i += 1
print()
for i in range(len(lst)):
print(lst[i], end = ' ')
print()
for i in lst:
print(i , end = ' ')
print()
task2.2
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
}
for key, value in book_info.items():
print(f'{key}: {value}')
print()
for item in book_info.items():
print(f'{item[0]}: {item[1]}')
print()
for value in book_info.values():
print(value, end = ' ')
print()
for key in book_info.keys():
print(book_info[key], end = ' ')
task3
str='''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!'''
lst=list(str.lower())
d={}
k=97
j=0
lst1=[]
for i in lst:
if i.isalpha():
lst1.append(i)
while k<123:
fre=str.lower().count(chr(k))
d.setdefault(chr(k),fre)
k += 1
d1 = sorted(d.items(), key = lambda x:x[1], reverse = True)
for i in d1:
print(f'{i[0]}:{i[1]}')
task4
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'}
print(f"{'专业代号信息':-^50}")
for key,value in code_majors.items():
print(f'{key}:{value}')
print(f"{'学生专业查询':-^50}")
stu_num=input('请输入学号:')
while stu_num!='#':
while stu_num!='#':
code = stu_num[4:8]
if int(code) in code_majors.keys():
print(f"{'专业是'}:{code_majors[int(code)]}")
elif int(code) not in code_majors.keys():
print('不在这些专业中...')
stu_num=input('请输入学号:')
if stu_num=='#':
print('查询结束...')
task5
import random
lucky_day = random.randint(1,31)
print(f'猜猜2023年5月哪一天会是你的lucky day{chr(0x1f609)}')
entered_number = eval(input('你有三次机会，猜吧（1~31）：'))
i = 0
while i < 3:
if entered_number == 0:
print('地球上没有这一天啦，你是外星人吗？')
elif entered_number < lucky_day:
print('猜早了，你的lucky day还没到呢')
elif entered_number > lucky_day:
print('猜晚了，你的lucky day已经过去了哦')
else:
print(f'哇，猜中了{chr(0x1f923)}')
break
if i == 2:
print('哇哦，次数用光啦.')
print(f'偷偷告诉你，5月你的lucky day是{lucky_day}号.good luck{chr(0x1f60A)}')
break
entered_number = eval(input('再猜（1~31）：'))
i += 1
task6
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']
}
x=list(datas.values())
s=list()
for i in x:
for j in i:
s.append(j)
lst=list(set(s))
a=0
d={}
while a<=len(lst)-1:
d.setdefault(lst[a],0)
a += 1
b=0
while b<=len(s)-1:
if s[b] in d.keys():
d[s[b]]=d[s[b]]+1
b += 1
d1 = sorted(d.items(), key = lambda x:x[1], reverse = True)
for i in d1:
print(f'{i[0]}:{i[1]}'
task7.1
"""
家用电器销售系统
v1.3
"""
#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('*' * 60)
print(f"{'编号': <10} {'名称': <10} {'品牌': <10} {'价格': <10} {'库存数量': <10} ")
print('-' * 65)
for i in range(len(products)):
print(f'{products[i][0]: <10} {products[i][1]: <10} {products[i][2]: <10} {products[i][3]: <10} {products[i][4]: <10}')
print('-' * 65)
elif option == '2':
products_id = input('请输入您要购买的产品编号：')
while products_id not in [item[0] for item in products]:
products_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(products_id) - 1][4]:
count = int(input('数据超出库存，请重新输入您要购买的产品数量：'))
#将所购买商品加入购物车
if products_id not in [item[0] for item in products_cart]:
products_cart.append([products_id,count])
else:
for i in range(len(products_cart)):
if products_cart[i][0] == products_id:
products_cart[i][1] += count
#更新商品列表
for i in range(len(products)):
if products[i][0] == products_id:
products[i][4] -= count
else:
print('购物车信息如下：')
print('*' * 60)
print(f"{'编号': <10} {'购买数量': <10}")
print('-' * 65)
for i in range(len(products_cart)):
print(f"{products_cart[i][0]: <10} {products_cart[i][1]: > 6}")
print('-' * 65)
option = input('操作成功！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')
#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(f'购买成功，您需要支付{amount:.2f}元')
#退出系统
print('谢谢您的光临，下次再见！')
task7.2
"""
家用电器销售系统
v1.3
"""
#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('*' * 60)
print(f"{'编号': <10} {'名称': <10} {'品牌': <10} {'价格': <10} {'库存数量': <10} ")
print('-' * 65)
for i in range(len(products)):
print(f'{products[i][0]: <10} {products[i][1]: <10} {products[i][2]: <10} {products[i][3]: <10} {products[i][4]: <10}')
print('-' * 65)
elif option == '2':
products_id = input('请输入您要购买的产品编号：')
while products_id not in [item[0] for item in products]:
products_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(products_id) - 1][4]:
count = int(input('数据超出库存，请重新输入您要购买的产品数量：'))
#将所购买商品加入购物车
if products_id not in [item[0] for item in products_cart]:
products_cart.append([products_id,count])
else:
for i in range(len(products_cart)):
if products_cart[i][0] == products_id:
products_cart[i][1] += count
#更新商品列表
for i in range(len(products)):
if products[i][0] == products_id:
products[i][4] -= count
else:
print('购物车信息如下：')
print('*' * 60)
print(f"{'编号': <10} {'购买数量': <10}")
print('-' * 65)
for i in range(len(products_cart)):
print(f"{products_cart[i][0]: <10} {products_cart[i][1]: > 6}")
print('-' * 65)
option = input('操作成功！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')
#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(f'购买成功，您需要支付{amount:.2f}元')
#退出系统
print('谢谢您的光临，下次再见！')
task8.1
"""
家用电器销售系统
v1.4
"""
#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('*' * 60)
print('%-10s' %'编号', '%-10s' %'名称', '%-10s' %'品牌', '%-10s' %'价格', '%-10s' %'库存数量')
print('-' * 65)
for i in range(len(products)):
print('%-10s' %products[i]['id'], '%-10s' %products[i]['name'], '%-10s' %products[i]['brand'],
'%-10s' %products[i]['price'], '%-10s' %products[i]['count'])
print('-' * 65)
elif option == '2':
products_id = input('请输入您要购买的产品编号：')
while products_id not in [item['id'] for item in products]:
products_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(products_id) - 1]['count']:
count = int(input('数据超出库存，请重新输入您要购买的产品数量：'))
#将所购买商品加入购物车
if products_id not in [item['id'] for item in products_cart]:
products_cart.append({'id':products_id, 'count':count})
else:
for i in range(len(products_cart)):
if products_cart[i].get('id') == products_id:
products_cart[i]['count'] += count
#更新商品列表
for i in range(len(products)):
if products[i]['id'] == products_id:
products[i]['count'] -= count
else:
print('购物车信息如下：')
print('*' * 60)
print('%-10s' %'编号', '%-10s' %'购买数量')
print('-' * 65)
for i in range(len(products_cart)):
print('%-10s' %products_cart[i]['id'], '%6d' %products_cart[i]['count'])
print('-' * 65)
option = input('操作成功！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')
#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%8.2f 元' %amount)
#退出系统
print('谢谢您的光临，下次再见！')
task8.2
"""
家用电器销售系统
v1.4
"""
#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('*' * 60)
print(f"{'编号': <10} {'名称': <10} {'品牌': <10} {'价格': <10} {'库存数量': <10} ")
print('-' * 65)
for i in range(len(products)):
print(f"{products[i]['id']: <10} {products[i]['name']: <10} {products[i]['brand']: <10} {products[i]['price']: <10} {products[i]['count']: <10}")
print('-' * 65)
elif option == '2':
products_id = input('请输入您要购买的产品编号：')
while products_id not in [item['id'] for item in products]:
products_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(products_id) - 1]['count']:
count = int(input('数据超出库存，请重新输入您要购买的产品数量：'))
#将所购买商品加入购物车
if products_id not in [item['id'] for item in products_cart]:
products_cart.append({'id':products_id, 'count':count})
else:
for i in range(len(products_cart)):
if products_cart[i].get('id') == products_id:
products_cart[i]['count'] += count
#更新商品列表
for i in range(len(products)):
if products[i]['id'] == products_id:
products[i]['count'] -= count
else:
print('购物车信息如下：')
print('*' * 60)
print(f"{'编号': <10} {'购买数量': <10}")
print('-' * 65)
for i in range(len(products_cart)):
print(f"{products_cart[i]['id']: <10} {products_cart[i]['count']: > 6}")
print('-' * 65)
option = input('操作成功！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')
#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(f'购买成功，您需要支付{amount:.2f}元')
#退出系统
print('谢谢您的光临，下次再见！')
标签：count,cart,amount,products,print,实验,id From： https://www.cnblogs.com/yuanlinuist/p/17352289.html