Python银行管理系统简易代码

以下是一个Python版简易银行管理系统的代码示例，实现了开户、账户查询、存取款、转账、改密、锁定、解锁、补卡、销户等银行管理操作。账户信息存在allusers.txt中，通过该文件的读存来实现账户的管理。

import os

# 定义用户类
class User:
    def __init__(self, name, password, balance=0):
        self.name = name
        self.password = password
        self.balance = balance
        self.is_locked = False

    # 存款
    def deposit(self, amount):
        self.balance += amount
        print("存款成功，当前余额为：", self.balance)

    # 取款
    def withdraw(self, amount):
        if amount > self.balance:
            print("余额不足，取款失败")
        else:
            self.balance -= amount
            print("取款成功，当前余额为：", self.balance)

    # 转账
    def transfer(self, to_user, amount):
        if self.balance < amount:
            print("余额不足，转账失败")
        else:
            self.balance -= amount
            to_user.balance += amount
            print("转账成功，当前余额为：", self.balance)

    # 修改密码
    def change_password(self, new_password):
        self.password = new_password
        print("密码修改成功")

    # 锁定账户
    def lock(self):
        self.is_locked = True
        print("账户已锁定")

    # 解锁账户
    def unlock(self):
        self.is_locked = False
        print("账户已解锁")

    # 补卡
    def reissue_card(self):
        print("补卡成功")

    # 销户
    def close_account(self):
        print("账户已销户")


# 定义银行类
class Bank:
    def __init__(self):
        self.users = {}
        self.load_users()

    # 加载用户信息
    def load_users(self):
        if not os.path.exists("allusers.txt"):
            return
        with open("allusers.txt", "r") as f:
            for line in f:
                name, password, balance, is_locked = line.strip().split(",")
                self.users[name] = User(name, password, int(balance))
                if is_locked == "True":
                    self.users[name].is_locked = True

    # 保存用户信息
    def save_users(self):
        with open("allusers.txt", "w") as f:
            for user in self.users.values():
                f.write("{},{},{},{}\n".format(user.name, user.password, user.balance, user.is_locked))

    # 开户
    def create_account(self, name, password):
        if name in self.users:
            print("该用户已存在")
        else:
            self.users[name] = User(name, password)
            self.save_users()
            print("开户成功")

    # 登录
    def login(self, name, password):
        if name not in self.users:
            print("该用户不存在")
        elif self.users[name].is_locked:
            print("该账户已被锁定，请联系管理员")
        elif self.users[name].password != password:
            print("密码错误")
        else:
            print("登录成功")

    # 查询余额
    def check_balance(self, name):
        if name not in self.users:
            print("该用户不存在")
        else:
            print("当前余额为：", self.users[name].balance)

    # 修改密码
    def change_password(self, name, old_password, new_password):
        if name not in self.users:
            print("该用户不存在")
        elif self.users[name].is_locked:
            print("该账户已被锁定，请联系管理员")
        elif self.users[name].password != old_password:
            print("原密码错误")
        else:
            self.users[name].change_password(new_password)
            self.save_users()

    # 锁定账户
    def lock_account(self, name):
        if name not in self.users:
            print("该用户不存在")
        else:
            self.users[name].lock()
            self.save_users()

    # 解锁账户
    def unlock_account(self, name):
        if name not in self.users:
            print("该用户不存在")
        else:
            self.users[name].unlock()
            self.save_users()

    # 补卡
    def reissue_card(self, name):
        if name not in self.users:
            print("该用户不存在")
        else:
            self.users[name].reissue_card()
            self.save_users()

    # 销户
    def close_account(self, name):
        if name not in self.users:
            print("该用户不存在")
        else:
            self.users.pop(name)
            self.save_users()
            print("账户已销户")

# 示例代码
bank = Bank()
bank.create_account("张三", "123456")
bank.login("张三", "123456")
bank.check_balance("张三")
bank.deposit("张三", 1000)
bank.check_balance("张三")
bank.withdraw("张三", 500)
bank.check_balance("张三")
bank.create_account("李四", "123456")
bank.transfer("张三", "李四", 200)
bank.check_balance("张三")
bank.check_balance("李四")
bank.change_password("张三", "123456", "654321")
bank.lock_account("张三")
bank.login("张三", "123456")
bank.unlock_account("张三")
bank.login("张三", "123456")
bank.reissue_card("张三")
bank.close_account("张三")