求关于一个python问题的解答
用python写一个小程序
点餐系统包含以下4个表
表 1
该表记录顾客的基本信息
Customers表包含以下7个字段:
CustomerId(顾客ID) FullName(顾客姓名) Gender(顾客性别) TelePhone(顾客电话号码)
Email(顾客电子邮件) Birthday(顾客生日) FavoriteDishes(顾客的偏好)
，其中CustomerId、FullName以及Gender不能为空
表 2
该表记录餐馆的菜谱信息
Menu表包含以下4个字段，全部不能为空:
dishId(食物的ID) dishName(食物的名字) Price(食物的价格)Category(食物的分类)
表 3
该表记录顾客的支付方式
Cards表包含以下2个字段，全部不能为空:
CardNo(信用卡卡号) CustomerId(顾客ID)
表 4
该表记录每个顾客点菜以及支付的信息
Orders表包含以下7个字段，全部不能为空:
CustomerId(顾客ID) DishId(食物的ID) CardNo(信用卡卡号) DateTime(订单时间)
Orders(食物的数量)OrderNo(随机或按照某种规律产生订单号,在系统中不能重复，可以借助日期时间)
Discount（折扣率）
该程序模拟一名顾客来餐馆点餐，然后使用电子支付方式支付。
点餐与支付流程如下：
顾客点餐前需要在Customers表以及Orders表中包含该顾客的信息。如果缺少该信息，需要顾客
注册到该系统，否则无法完成点餐。在以上信息完备后（程序检查核实之后），顾客可以点餐。
顾客根据菜单的信息点餐然后支付，信息就会保存到Orders表中，顾客可以一次点多个
菜肴，也可以一个菜肴点多份。相当于CustomerId(顾客ID)，DishId(食物的ID)以及
CardNo(信用卡卡号)构成一条记录的标识(ID),例如顾客在一次点餐中点了3个不同菜肴，就会产
生三条记录，为了确保这三条记录是一次点餐产生的，他们的OrderNo(订单号)应该是一样的。
以上4个表的记录都应该可以增、删、改、查但是不能出现‘孤儿记录’，例如Orders表出现了一条
点餐记录，但是这名顾客的基本信息或卡号信息却在相应的表中查不到。
该程序要完成以下功能：
1 可以新增、修改或查询顾客信息以及顾客的信用卡信息（Customers）
2 可以新增、修改或查询菜品信息（Menu）
3 可以让已注册的顾客（在顾客信息表中已有的）进行点餐（在Orders产生多条记录）
4 可以查询顾客的点餐信息（Orders）
5 根据点餐信息可以统计该餐厅一段时间（天，星期，月等）的营业额，顾客在某一段时间的
消费金额（最好从高到低排序），菜品在某一段时间销售数量（最好从高到低排序）
6 修改后的数据要保存到excel文件中
7 功能正确，代码高效
8 要求以函数或类的形式完成代码，要有注释
可以采纳：
import random
import datetime
import openpyxl
class Customer:
def __init__(self, customer_id, full_name, gender, telephone, email, birthday, favorite_dishes):
self.customer_id = customer_id
self.full_name = full_name
self.gender = gender
self.telephone = telephone
self.email = email
self.birthday = birthday
self.favorite_dishes = favorite_dishes
def __str__(self):
return f"{self.customer_id} {self.full_name} {self.gender} {self.telephone} {self.email} {self.birthday} {self.favorite_dishes}"
class Menu:
def __init__(self, dish_id, dish_name, price, category):
self.dish_id = dish_id
self.dish_name = dish_name
self.price = price
self.category = category
def __str__(self):
return f"{self.dish_id} {self.dish_name} {self.price} {self.category}"
class Card:
def __init__(self, card_no, customer_id):
self.card_no = card_no
self.customer_id = customer_id
def __str__(self):
return f"{self.card_no} {self.customer_id}"
class Order:
def __init__(self, customer_id, dish_id, card_no, orders, discount):
self.customer_id = customer_id
self.dish_id = dish_id
self.card_no = card_no
self.orders = orders
self.discount = discount
self.order_no = random.randint(1000,9999)
self.date_time = datetime.datetime.now()
def __str__(self):
return f"{self.customer_id} {self.dish_id} {self.card_no} {self.orders} {self.discount} {self.order_no} {self.date_time}"
class Restaurant:
def __init__(self):
self.customers = []
self.menu = []
self.cards = []
self.orders = []
def add_customer(self, customer_id, full_name, gender, telephone, email, birthday, favorite_dishes):
customer = Customer(customer_id, full_name, gender, telephone, email, birthday, favorite_dishes)
self.customers.append(customer)
def modify_customer(self, customer_id, full_name, gender, telephone, email, birthday, favorite_dishes):
for customer in self.customers:
if customer.customer_id == customer_id:
customer.full_name = full_name
customer.gender = gender
customer.telephone = telephone
customer.email = email
customer.birthday = birthday
customer.favorite_dishes = favorite_dishes
def delete_customer(self, customer_id):
for customer in self.customers:
if customer.customer_id == customer_id:
self.customers.remove(customer)
def query_customer(self, customer_id):
for customer in self.customers:
if customer.customer_id == customer_id:
return customer
def add_dish(self, dish_id, dish_name, price, category):
dish = Menu(dish_id, dish_name, price, category)
self.menu.append(dish)
def modify_dish(self, dish_id, dish_name, price, category):
for dish in self.menu:
if dish.dish_id == dish_id:
dish.dish_name = dish_name
dish.price = price
dish.category = category
def delete_dish(self, dish_id):
for dish in self.menu:
if dish.dish_id == dish_id:
self.menu.remove(dish)
def query_dish(self, dish_id):
for dish in self.menu:
if dish.dish_id == dish_id:
return dish
def add_card(self, card_no, customer_id):
card = Card(card_no, customer_id)
self.cards.append(card)
def modify_card(self, card_no, customer_id):
for card in self.cards:
if card.card_no == card_no:
card.customer_id = customer_id
def delete_card(self, card_no):
for card in self.cards:
if card.card_no == card_no:
self.cards.remove(card)
def query_card(self, card_no):
for card in self.cards:
if card.card_no == card_no:
return card
def add_order(self, customer_id, dish_id, card_no, orders, discount):
order = Order(customer_id, dish_id, card_no, orders, discount)
self.orders.append(order)
def modify_order(self, order_no, customer_id, dish_id, card_no, orders, discount):
for order in self.orders:
if order.order_no == order_no:
order.customer_id = customer_id
order.dish_id = dish_id
order.card_no = card_no
order.orders = orders
order.discount = discount
def delete_order(self, order_no):
for order in self.orders:
if order.order_no == order_no:
self.orders.remove(order)
def query_order(self, order_no):
for order in self.orders:
if order.order_no == order_no:
return order
def calculate_revenue(self, start_date, end_date):
total_revenue = 0
for order in self.orders:
if start_date <= order.date_time <= end_date:
total_revenue += order.orders * order.discount
return total_revenue
def calculate_customer_expense(self, customer_id, start_date, end_date):
total_expense = 0
for order in self.orders:
if order.customer_id == customer_id and start_date <= order.date_time <= end_date:
total_expense += order.orders * order.discount
return total_expense
def calculate_dish_sales(self, dish_id, start_date, end_date):
total_sales = 0
for order in self.orders:
if order.dish_id == dish_id and start_date <= order.date_time <= end_date:
total_sales += order.orders
return total_sales
def export_to_excel(self, file_name):
wb = openpyxl.Workbook()
ws = wb.active
ws.title = "Orders"
ws['A1'] = "Order No."
ws['B1'] = "Customer ID"
ws['C1'] = "Dish ID"
ws['D1'] = "Card No."
ws['E1'] = "Orders"
ws['F1'] = "Discount"
ws['G1'] = "Date Time"
row = 2
for order in self.orders:
ws.cell(row=row, column=1, value=order.order_no)
ws.cell(row=row, column=2, value=order.customer_id)
ws.cell(row=row, column=3, value=order.dish_id)
ws.cell(row=row, column=4, value=order.card_no)
ws.cell(row=row, column=5, value=order.orders)
ws.cell(row=row, column=6, value=order.discount)
ws.cell(row=row, column=7, value=order.date_time)
row += 1
wb.save(file_name)
# 测试代码
restaurant = Restaurant()
# 添加顾客
restaurant.add_customer("C001", "张三", "男", "13812345678", "zhangsan@example.com", "1990-01-01", "红烧肉, 鱼香肉丝")
restaurant.add_customer("C002", "李四", "女", "13912345678", "lisi@example.com", "1995-01-01", "宫保鸡丁, 麻婆豆腐")
restaurant.add_customer("C003", "王五", "男", "13612345678", "wangwu@example.com", "1985-01-01", "清蒸鲈鱼, 麻辣火锅")
# 修改顾客信息
restaurant.modify_customer("C001", "张三丰", "男", "13812345678", "zhangsan@example.com", "1990-01-01", "红烧肉, 鱼香肉丝, 糖醋排骨")
# 删除顾客
restaurant.delete_customer("C003")
# 查询顾客
customer = restaurant.query_customer("C002")
print(customer)
# 添加菜品
restaurant.add_dish("D001", "宫保鸡丁", 25.0, "川菜")
restaurant.add_dish("D002", "鱼香肉丝", 28.0, "川菜")
restaurant.add_dish("D003", "清蒸鲈鱼", 88.0, "粤菜")
# 修改菜品信息
restaurant.modify_dish("D001", "宫保鸡", 22.0, "川菜")
# 删除菜品
restaurant.delete_dish("D003")
# 查询菜品
dish = restaurant.query_dish("D002")
print(dish)
# 添加信用卡
restaurant.add_card("1234567890123456", "C001")
restaurant.add_card("2345678901234567", "C002")
restaurant.add_card("3456789012345678", "C002")
# 修改信用卡信息
restaurant.modify_card("2345678901234567", "C001")
# 删除信用卡
restaurant.delete_card("3456789012345678")
# 查询信用卡
card = restaurant.query_card("1234567890123456")
print(card)
# 添加订单
restaurant.add_order("C001", "D001", "1234567890123456", 2, 0.9)
restaurant.add_order("C002", "D002", "2345678901234567", 3, 0.8)
restaurant.add_order("C002", "D001", "2345678901234567", 4, 0.8)
# 修改订单信息
restaurant.modify_order(1000, "C001", "D001", "1234567890123456", 3, 0.9)
# 删除订单
restaurant.delete_order(1002)
# 查询订单
order = restaurant.query_order(1001)
print(order)
# 计算总收入
total_revenue = restaurant.calculate_revenue(datetime.datetime(2022,1,1), datetime.datetime.now())
print(total_revenue)
# 计算特定顾客的总消费
total_expense = restaurant.calculate_customer_expense("C002", datetime.datetime(2022,1,1), datetime.datetime.now())
print(total_expense)
# 计算特定菜品的总销售量
total_sales = restaurant.calculate_dish_sales("D001", datetime.datetime(2022,1,1), datetime.datetime.now())
print(total_sales)
# 导出数据到Excel文件
restaurant.export_to_excel("orders.xlsx")
这些存放在什么数据库中？
又是表（数据库）又是python？可否清晰描述问题
- 以下回答由chatgpt基于相关博客总结生成:
针对点餐系统的问题，我建议以下几点优化： 1. 数据库设计方面，需要仔细设计四个表的字段类型和互相之间的关系。建议使用MySQL数据库，可以使用Python中的ORM框架如SQLAlchemy或Django的ORM进行开发。针对字段填写和逻辑判断，可以使用数据库的约束、触发器以及存储过程等技术进行实现。
前端页面方面，可以采用Vue.js、React等框架进行开发，使用webpack等工具打包部署。对于表单的填写和验证，可以使用Vue.js自带的表单验证功能以及第三方表单验证库如VeeValidate进行实现。
后端接口方面，可以使用Python的Web框架如Flask或Django进行开发，提供所需的API接口。对于API接口的验证和安全，可以采用Python的JWT(JSON Web Tokens)技术进行实现。
发布和部署方面，可以采用Docker容器化技术进行部署，以实现快速部署和管理。同时，可以使用Nginx进行反向代理、负载均衡等高级特性，提高系统的性能和可用性。
以上为一些初步的建议，需要具体情况具体分析和实现。如果有具体的问题和困难，可以再给我留言，我会尽力提供帮助。
答案参考ChatGPT Plus版，整理汇总。希望能帮助你解决问题
下面是一个用Python编写的点餐系统程序，包含了各个表的新增、修改和查询功能，并可以将修改后的数据保存到Excel文件中。程序使用了类来组织代码，函数实现了各个功能。以下是代码示例：
import openpyxl
class Customer:
def __init__(self, customer_id, full_name, gender, telephone, email, birthday, favorite_dishes):
self.customer_id = customer_id
self.full_name = full_name
self.gender = gender
self.telephone = telephone
self.email = email
self.birthday = birthday
self.favorite_dishes = favorite_dishes
class Menu:
def __init__(self, dish_id, dish_name, price, category):
self.dish_id = dish_id
self.dish_name = dish_name
self.price = price
self.category = category
class Card:
def __init__(self, card_no, customer_id):
self.card_no = card_no
self.customer_id = customer_id
class Order:
def __init__(self, customer_id, dish_id, card_no, date_time, quantity, order_no, discount):
self.customer_id = customer_id
self.dish_id = dish_id
self.card_no = card_no
self.date_time = date_time
self.quantity = quantity
self.order_no = order_no
self.discount = discount
class Restaurant:
def __init__(self):
self.customers = []
self.menu = []
self.cards = []
self.orders = []
def add_customer(self, customer):
self.customers.append(customer)
def update_customer(self, customer_id, new_customer):
for i, customer in enumerate(self.customers):
if customer.customer_id == customer_id:
self.customers[i] = new_customer
break
def search_customer(self, customer_id):
for customer in self.customers:
if customer.customer_id == customer_id:
return customer
return None
def add_menu_item(self, menu_item):
self.menu.append(menu_item)
def update_menu_item(self, dish_id, new_menu_item):
for i, menu_item in enumerate(self.menu):
if menu_item.dish_id == dish_id:
self.menu[i] = new_menu_item
break
def search_menu_item(self, dish_id):
for menu_item in self.menu:
if menu_item.dish_id == dish_id:
return menu_item
return None
def add_card(self, card):
self.cards.append(card)
def update_card(self, card_no, new_card):
for i, card in enumerate(self.cards):
if card.card_no == card_no:
self.cards[i] = new_card
break
def search_card(self, card_no):
for card in self.cards:
if card.card_no == card_no:
return card
return None
def place_order(self, order):
self.orders.append(order)
def search_orders(self, customer_id):
customer_orders = []
for order in self.orders:
if order.customer_id == customer_id:
customer_orders.append(order)
return customer_orders
def calculate_revenue(self, start_date, end_date):
total_revenue = 0
for order in self.orders:
if start_date <= order.date_time <= end_date:
menu_item = self.search_menu_item(order.dish_id)
if menu_item:
total_revenue += menu_item.price * order.quantity
return total
_revenue
def calculate_customer_spending(self, start_date, end_date):
customer_spending = {}
for order in self.orders:
if start_date <= order.date_time <= end_date:
customer = self.search_customer(order.customer_id)
if customer:
if customer.customer_id in customer_spending:
customer_spending[customer.customer_id] += order.quantity * self.search_menu_item(order.dish_id).price
else:
customer_spending[customer.customer_id] = order.quantity * self.search_menu_item(order.dish_id).price
sorted_spending = sorted(customer_spending.items(), key=lambda x: x[1], reverse=True)
return sorted_spending
def calculate_dish_sales(self, start_date, end_date):
dish_sales = {}
for order in self.orders:
if start_date <= order.date_time <= end_date:
menu_item = self.search_menu_item(order.dish_id)
if menu_item:
if menu_item.dish_id in dish_sales:
dish_sales[menu_item.dish_id] += order.quantity
else:
dish_sales[menu_item.dish_id] = order.quantity
sorted_sales = sorted(dish_sales.items(), key=lambda x: x[1], reverse=True)
return sorted_sales
def save_to_excel(self, filename):
wb = openpyxl.Workbook()
ws_customers = wb.active
ws_customers.title = "Customers"
ws_customers.append(["CustomerId", "FullName", "Gender", "TelePhone", "Email", "Birthday", "FavoriteDishes"])
for customer in self.customers:
ws_customers.append([customer.customer_id, customer.full_name, customer.gender, customer.telephone,
customer.email, customer.birthday, customer.favorite_dishes])
ws_menu = wb.create_sheet(title="Menu")
ws_menu.append(["dishId", "dishName", "Price", "Category"])
for menu_item in self.menu:
ws_menu.append([menu_item.dish_id, menu_item.dish_name, menu_item.price, menu_item.category])
ws_cards = wb.create_sheet(title="Cards")
ws_cards.append(["CardNo", "CustomerId"])
for card in self.cards:
ws_cards.append([card.card_no, card.customer_id])
ws_orders = wb.create_sheet(title="Orders")
ws_orders.append(["CustomerId", "DishId", "CardNo", "DateTime", "Orders", "OrderNo", "Discount"])
for order in self.orders:
ws_orders.append([order.customer_id, order.dish_id, order.card_no, order.date_time,
order.quantity, order.order_no, order.discount])
wb.save(filename)
# 示例用法
restaurant = Restaurant()
# 添加顾客信息
customer1 = Customer("1", "John Doe", "Male", "123456789", "john@example.com", "1990-01-01", "Pizza")
restaurant.add_customer(customer1)
# 修改顾客信息
customer1_modified = Customer("1", "John Doe", "Male", "987654321", "john@example.com", "1990-01-01", "Burger")
restaurant.update_customer("1", customer1_modified)
# 查询顾客信息
customer = restaurant.search_customer("1")
if customer:
print("Customer found:", customer.full_name)
else:
print("Customer not found")
# 添加菜品信息
menu_item1 = Menu("1", "Pizza Margherita", 10.99, "Pizza")
restaurant.add_menu_item(menu_item1)
# 修改菜品信息
menu_item1_modified = Menu("1", "Margher
ita Pizza", 11.99, "Pizza")
restaurant.update_menu_item("1", menu_item1_modified)
# 查询菜品信息
menu_item = restaurant.search_menu_item("1")
if menu_item:
print("Menu item found:", menu_item.dish_name)
else:
print("Menu item not found")
# 添加信用卡信息
card1 = Card("1234567890", "1")
restaurant.add_card(card1)
# 修改信用卡信息
card1_modified = Card("0987654321", "1")
restaurant.update_card("1234567890", card1_modified)
# 查询信用卡信息
card = restaurant.search_card("0987654321")
if card:
print("Card found:", card.card_no)
else:
print("Card not found")
# 下单
order1 = Order("1", "1", "0987654321", "2023-06-16 12:00:00", 2, "12345", 0.1)
restaurant.place_order(order1)
# 查询顾客的订单信息
customer_orders = restaurant.search_orders("1")
for order in customer_orders:
print("Order No:", order.order_no, "Dish ID:", order.dish_id)
# 计算营业额
revenue = restaurant.calculate_revenue("2023-06-16 00:00:00", "2023-06-16 23:59:59")
print("Total revenue:", revenue)
# 计算顾客消费金额
customer_spending = restaurant.calculate_customer_spending("2023-06-16 00:00:00", "2023-06-16 23:59:59")
for customer_id, spending in customer_spending:
print("Customer ID:", customer_id, "Spending:", spending)
# 计算菜品销售数量
dish_sales = restaurant.calculate_dish_sales("2023-06-16 00:00:00", "2023-06-16 23:59:59")
for dish_id, sales in dish_sales:
print("Dish ID:", dish_id, "Sales:", sales)
# 将数据保存到Excel文件
restaurant.save_to_excel("restaurant_data.xlsx")
请注意，这只是一个示例，你可能需要根据实际需求进行适当的修改和扩展。此示例使用openpyxl库来处理Excel文件，请确保已安装该库（可以使用pip install openpyxl进行安装）。
代码中包含了注释以帮助理解每个功能的作用和使用方法。你可以根据需要进行修改和扩展，以满足实际项目的要求。
import datetime
import random
import pandas as pd
# 定义Customers表的类
class Customers:
def __init__(self, file_path):
self.file_path = file_path
self.customers_data = pd.read_excel(file_path)
# 新增顾客信息
def add_customer(self, customer_id, full_name, gender, telephone, email, birthday, favorite_dishes):
new_customer = pd.DataFrame(
{
'CustomerId': [customer_id],
'FullName': [full_name],
'Gender': [gender],
'TelePhone': [telephone],
'Email': [email],
'Birthday': [birthday],
'FavoriteDishes': [favorite_dishes]
}
)
self.customers_data = self.customers_data.append(new_customer, ignore_index=True)
self.save_data()
# 修改顾客信息
def update_customer(self, customer_id, **kwargs):
self.customers_data.loc[self.customers_data['CustomerId'] == customer_id, kwargs.keys()] = kwargs.values()
self.save_data()
# 查询顾客信息
def query_customer(self, customer_id):
return self.customers_data.loc[self.customers_data['CustomerId'] == customer_id]
# 保存数据到Excel文件
def save_data(self):
self.customers_data.to_excel(self.file_path, index=False)
# 定义Menu表的类
class Menu:
def __init__(self, file_path):
self.file_path = file_path
self.menu_data = pd.read_excel(file_path)
# 新增菜品信息
def add_dish(self, dish_id, dish_name, price, category):
new_dish = pd.DataFrame(
{
'dishId': [dish_id],
'dishName': [dish_name],
'Price': [price],
'Category': [category]
}
)
self.menu_data = self.menu_data.append(new_dish, ignore_index=True)
self.save_data()
# 修改菜品信息
def update_dish(self, dish_id, **kwargs):
self.menu_data.loc[self.menu_data['dishId'] == dish_id, kwargs.keys()] = kwargs.values()
self.save_data()
# 查询菜品信息
def query_dish(self, dish_id):
return self.menu_data.loc[self.menu_data['dishId'] == dish_id]
# 保存数据到Excel文件
def save_data(self):
self.menu_data.to_excel(self.file_path, index=False)
# 定义Orders表的类
class Orders:
def __init__(self, file_path):
self.file_path = file_path
self.orders_data = pd.read_excel(file_path)
# 点餐
def place_order(self, customer_id, dish_id, card_no, dishes_quantity, discount):
current_datetime = datetime.datetime.now()
order_no = current_datetime.strftime('%Y%m%d%H%M%S') + str(random.randint(1000, 9999))
new_order = pd.DataFrame(
{
'CustomerId': [customer_id],
'DishId': [dish_id],
'CardNo': [card_no],
'DateTime': [current_datetime],
'Orders': [dishes_quantity],
'OrderNo': [order_no],
'Discount': [discount]
}
)
self.orders_data = self.orders_data.append(new_order, ignore_index=True)
self.save_data()
# 查询顾客的点餐信息
def query_customer_orders(self, customer_id):
return self.orders_data.loc[self.orders_data['CustomerId'] == customer_id]
# 统计营业额
def calculate_revenue(self, start_date, end_date):
filtered_data = self.orders_data.loc[(self.orders_data['DateTime'] >= start_date) &
(self.orders_data['DateTime'] <= end_date)]
total_revenue = filtered_data['Price'].sum()
return total_revenue
# 统计顾客消费金额
def calculate_customer_spending(self, customer_id, start_date, end_date):
filtered_data = self.orders_data.loc[(self.orders_data['CustomerId'] == customer_id) &
(self.orders_data['DateTime'] >= start_date) &
(self.orders_data['DateTime'] <= end_date)]
customer_spending = filtered_data['Price'].sum()
return customer_spending
# 统计菜品销售数量
def calculate_dish_sales(self, start_date, end_date):
filtered_data = self.orders_data.loc[(self.orders_data['DateTime'] >= start_date) &
(self.orders_data['DateTime'] <= end_date)]
dish_sales = filtered_data.groupby('DishId')['Orders'].sum().reset_index()
dish_sales = dish_sales.sort_values(by='Orders', ascending=False)
return dish_sales
# 保存数据到Excel文件
def save_data(self):
self.orders_data.to_excel(self.file_path, index=False)
# 测试程序
def test_program():
customers = Customers('Customers.xlsx')
menu = Menu('Menu.xlsx')
orders = Orders('Orders.xlsx')
# 新增顾客信息
customers.add_customer('C001', 'John Doe', 'Male', '1234567890', 'john@example.com', '1990-01-01', 'Pizza')
# 修改顾客信息
customers.update_customer('C001', FullName='John Smith')
# 查询顾客信息
print(customers.query_customer('C001'))
# 新增菜品信息
menu.add_dish('D001', 'Pizza Margherita', 10, 'Pizza')
# 修改菜品信息
menu.update_dish('D001', dishName='Margherita Pizza')
# 查询菜品信息
print(menu.query_dish('D001'))
# 点餐
orders.place_order('C001', 'D001', '1234567890123456', 2, 0.2)
# 查询顾客的点餐信息
print(orders.query_customer_orders('C001'))
# 统计营业额
revenue = orders.calculate_revenue(datetime.datetime(2023, 6, 1), datetime.datetime(2023, 6, 15))
print("Total revenue:", revenue)
# 统计顾客消费金额
customer_spending = orders.calculate_customer_spending('C001', datetime.datetime(2023, 6, 1),
datetime.datetime(2023, 6, 15))
print("Customer spending:", customer_spending)
# 统计菜品销售数量
dish_sales = orders.calculate_dish_sales(datetime.datetime(2023, 6, 1), datetime.datetime(2023, 6, 15))
print("Dish sales:")
print(dish_sales)
# 运行测试程序
test_program()
回答部分参考、引用ChatGpt以便为您提供更准确的答案：
Android 8192级调光是一种屏幕亮度调节的功能，它指的是Android设备支持的亮度级别数量达到8192级。在传统的调光功能中，常见的是采用256级或者1024级来控制屏幕的亮度变化。增加调光级别的目的是为了提供更细粒度的亮度控制，让用户能够更准确地选择适合自己的屏幕亮度。
是否属于伪需求，取决于具体的使用场景和用户需求。对于大多数用户来说，256级或者1024级的调光已经能够满足日常使用的需求，8192级调光可能并不会给他们带来显著的提升。因此，从一般用户的角度来看，可以认为8192级调光可能是一个相对较小的改进，不是迫切需要的功能。
然而，对于某些特殊的用户群体或特定的应用场景，8192级调光可能会有更大的意义。例如，对于专业摄影师或需要精确色彩表现的用户来说，更多的亮度级别可以提供更准确的色彩控制，帮助他们更好地展示照片或视频作品。此外，某些应用场景可能对于亮度变化的细微差异更加敏感，例如虚拟现实或增强现实应用，更高级别的调光能够提供更好的沉浸感和视觉效果。
至于其原理，Android设备实现8192级调光的原理涉及到硬件和软件的协作。硬件方面，屏幕需要支持相应的亮度级别，并能够根据输入的亮度值进行精确的调节。软件方面，Android操作系统提供了API和控制机制，使应用程序能够访问和控制屏幕亮度。通过软件和硬件的配合，用户可以在系统设置或应用程序中选择所需的亮度级别，系统会相应地调整屏幕的亮度。
总结而言，Android 8192级调光不仅仅是宣传的噱头，它可以作为屏幕技术的进步，并在特定的用户群体或应用场景中提供更好的亮度控制体验。然而，对于一般用户来说，它可能不是一个迫切需要的功能。