1、定义银行帐户类，变量有“帐号”和“存款余额”，“存取历史〞，方法有“存 款”、“取款”、“查询余额”、〞品示帐号”以及存储功能，能查询历史存取记录

以下是一个简单的Python代码实现，定义了一个BankAccount类，包括帐号、存款余额、存取历史等属性和方法：

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

    def deposit(self, amount):
        self.balance += amount
        self.transaction_history.append(f"Deposit: {amount}")

    def withdraw(self, amount):
        if amount <= self.balance:
            self.balance -= amount
            self.transaction_history.append(f"Withdraw: {amount}")
        else:
            print("Insufficient balance!")

    def check_balance(self):
        print(f"Account balance: {self.balance}")

    def display_account_number(self):
        print(f"Account number: {self.account_number}")

    def display_transaction_history(self):
        if len(self.transaction_history) == 0:
            print("No transaction history!")
        else:
            print("Transaction history:")
            for transaction in self.transaction_history:
                print(transaction)

使用示例：

# 创建一个帐户
account = BankAccount("123456789", 1000)

# 存款
account.deposit(500)
account.check_balance()  # 输出: Account balance: 1500

# 取款
account.withdraw(200)
account.check_balance()  # 输出: Account balance: 1300

# 查询帐号和历史记录
account.display_account_number()  # 输出: Account number: 123456789
account.display_transaction_history()  # 输出: Transaction history: Deposit: 500, Withdraw: 200