python中银行账号的继承与打印

class BankAccount:
    def __init__(self, account_number, balance):
        self.account_number = account_number
        self.balance = balance

    def deposit(self, amount):
        self.balance += amount

    def withdraw(self, amount):
        if self.balance >= amount:
            self.balance -= amount
        else:
            print("Insufficient funds")

    def print_balance(self):
        print("Account Number:", self.account_number)
        print("Balance:", self.balance)


class SavingsAccount(BankAccount):
    def __init__(self, account_number, balance, interest_rate):
        super().__init__(account_number, balance)
        self.interest_rate = interest_rate

    def calculate_interest(self):
        interest = self.balance * self.interest_rate
        self.balance += interest

    def print_balance(self):
        super().print_balance()
        print("Interest Rate:", self.interest_rate)


# 创建一个银行账号对象
account = BankAccount("1234567890", 1000)
account.deposit(500)
account.withdraw(200)
account.print_balance()

# 创建一个储蓄账户对象
savings_account = SavingsAccount("0987654321", 2000, 0.05)
savings_account.deposit(1000)
savings_account.calculate_interest()
savings_account.print_balance()