日安，请我试图创建一个预算应用程序，使用Python。我使用了一个Category类，它可以示例化不同的预算类别。
我有一个转移和撤回示例方法和一个转移方法。问题是，当我使用transfer方法时，它并没有反映在被转移到的catory中。拜托，我该怎么做？
code
code output

class Category:
    def __init__(self, category):
        self.category = category
        self.ledger = []
    def deposit(self, amount, description=""):
        #self.amount = amount
        #self.description = description
        b = {"amount": amount, "description": description}
        self.ledger.append(b)
    def withdraw(self, amount, description=""):
        amount = amount * -1
        #self.description = description
        self.ledger.append({"amount": amount, "description": description})
    def get_balance(self):
        balance = 0
        for i in self.ledger:
            balance = balance + i["amount"]
        return(balance)
    def transfer(self, amount, new_category):
        self.withdraw(amount, f"Transfer to {new_category}")
        Category(new_category).deposit(amount, f"Transfer from {self.category}")
    def __str__(self):
        return(f"This is the budget for {self.category}")
    
    
food = Category("food")
housing = Category("housing")
food.deposit(200, "lunch")
food.withdraw(400, "Indomie")
food.transfer(480, "housing")
print(food)
print(food.ledger)
print(food.get_balance())
print(housing.ledger)
print(housing.get_balance())

我有一个转移和撤回示例方法和一个转移方法。问题是，当我使用transfer方法时，它并没有反映在被转移到的catory中。拜托，我该怎么做？