class Account: def init(self, id, balance, rate): self.__id = id self.__balance = balance self.__rate = rate

def get_id(self):
    return self.__id

def set_id(self, id):
    self.__id = id

def get_balance(self):
    return self.__balance

def set_balance(self, balance):
    self.__balance = balance

def get_rate(self):
    return self.__rate

def set_rate(self, rate):
    self.__rate = rate

def withdraw(self, amount):
    if amount > self.__balance:
        print("余额不足，取钱失败")
    else:
        self.__balance -= amount
        print("成功取出：{}".format(amount))

def deposit(self, amount):
    self.__balance += amount
    print("成功存入：{}".format(amount))

class Customer: def init(self, name, account): self.__name = name self.__account = account

def get_name(self):
    return self.__name

def set_name(self, name):
    self.__name = name

def get_account(self):
    return self.__account

def set_account(self, account):
    self.__account = account

测试程序

account = Account(1000, 2000, 1.23) customer = Customer("Jane Smith", account)

customer.get_account().deposit(100) customer.get_account().withdraw(960) customer.get_account().withdraw(2000)

print("姓名：{}".format(customer.get_name())) print("账户ID：{}".format(customer.get_account().get_id())) print("余额：{}".format(customer.get_account().get_balance())) print("年利率：{}".format(customer.get_account().get_rate())