来自同一字典的不同类中的项目重复项的 Python 问题

Question

我正在运行此代码，当我将物品添加到库存时，该物品出现在所有库存类中，我在哪里出错了？一旦我运行 Browse()，添加新库存，向其中添加项目，当我创建新库存时，第一个库存中的项目默认出现在新库存中。我该如何解决这个问题男孩和女孩？

inventories = {}

class Inventory: ##Class for new inventory

    inventory = {}

    items = {}

    def __init__(self,name):

        self.name = name

    def add_item(self,item,price,amount):

        if item in self.items:

            return False

        else:

            self.items[item] = int(price)

            self.inventory[item] = int(amount)

            return True

    def add_amount(self,item,amount):

        self.inventory[item] += amount

    def update_amount(self,item,amount):

        self.inventory[item] = amount

    def remove_amount(self,item,amount):

        self.inventory[item] -= amount

    def update_item_price(self,item,price):

        self.items[item] = price

    def inv_list(self): ##Print the class

        print(self.name)

        print("\nItem:          Price:        Amount:\n")

        for item in self.inventory:

            print(f"{item}\t\t{self.items[item]}\t\t{self.inventory[item]}")

def new_inventory(): ##MAkes a new inventory class and stores in inventories{}

    global inventories

    while True:

        answer = input("What would you like to call your new Inventory?")

        if answer in inventories:

            print("Name already taken")

            continue

        inventories[answer] = Inventory(answer)

        print("Inventory created")

        update(answer)

        break

Answer 1

  inventory = {}    items = {}正在为所有类实例创建共享属性。您应该初始化__init__方法中的属性。class inventory:    def __init__(self, name):        self.name = name        self.inventory = {}        self.items = {}