用python写一个超市商品管理系统

好的，下面是一个简单的超市商品管理系统的 Python 代码示例：

class Product:
    def __init__(self, name, price, quantity):
        self.name = name
        self.price = price
        self.quantity = quantity

class Inventory:
    def __init__(self):
        self.products = []

    def add_product(self, product):
        self.products.append(product)

    def remove_product(self, product):
        self.products.remove(product)

    def search_product(self, name):
        for product in self.products:
            if product.name == name:
                return product
        return None

class ShoppingCart:
    def __init__(self):
        self.products = []

    def add_product(self, product):
        self.products.append(product)

    def remove_product(self, product):
        self.products.remove(product)

    def checkout(self):
        total_price = 0
        for product in self.products:
            total_price += product.price * product.quantity
        return total_price

inventory = Inventory()
shopping_cart = ShoppingCart()

while True:
    print("1. Add product")
    print("2. Remove product")
    print("3. Search product")
    print("4. Add to cart")
    print("5. Remove from cart")
    print("6. Checkout")
    print("7. Exit")

    choice = int(input("Enter your choice: "))

    if choice == 1:
        name = input("Enter product name: ")
        price = float(input("Enter product price: "))
        quantity = int(input("Enter product quantity: "))
        product = Product(name, price, quantity)
        inventory.add_product(product)

    elif choice == 2:
        name = input("Enter product name: ")
        product = inventory.search_product(name)
        if product:
            inventory.remove_product(product)
        else:
            print("Product not found")

    elif choice == 3:
        name = input("Enter product name: ")
        product = inventory.search_product(name)
        if product:
            print("Name: ", product.name)
            print("Price: ", product.price)
            print("Quantity: ", product.quantity)
        else:
            print("Product not found")

    elif choice == 4:
        name = input("Enter product name: ")
        product = inventory.search_product(name)
        if product:
            quantity = int(input("Enter quantity: "))
            shopping_cart.add_product(Product(product.name, product.price, quantity))
        else:
            print("Product not found")

    elif choice == 5:
        name = input("Enter product name: ")
        product = None
        for p in shopping_cart.products:
            if p.name == name:
                product = p
                break
        if product:
            shopping_cart.remove_product(product)
        else:
            print("Product not found")

    elif choice == 6:
        total_price = shopping_cart.checkout()
        print("Total price: ", total_price)
        shopping_cart = ShoppingCart()

    elif choice == 7:
        break

    else:
        print("Invalid choice")

这个示例程序允许用户添加、删除、搜索商品，以及向购物车中添加、移除商品，结账等功能。你可以根据自己的需求和业务逻辑进行修改和扩展。