用Python写一个银行管理系统

好的，以下是一个简单的银行管理系统的 Python 代码，包含基本的账户管理、存取款和查询功能：

class BankAccount:
    def __init__(self, name, balance=0.0):
        self.name = name
        self.balance = balance
        
    def deposit(self, amount):
        self.balance += amount
        print("Deposited:", amount)
        
    def withdraw(self, amount):
        if self.balance >= amount:
            self.balance -= amount
            print("Withdrawn:", amount)
        else:
            print("Insufficient balance!")
            
    def display(self):
        print("Name:", self.name, "Balance:", self.balance)

accounts = {}

while True:
    print("Bank Account Management System")
    print("1. Create an account")
    print("2. Deposit")
    print("3. Withdraw")
    print("4. Display account details")
    print("5. Quit")
    
    choice = int(input("Enter your choice: "))
    
    if choice == 1:
        name = input("Enter your name: ")
        balance = float(input("Enter initial balance: "))
        accounts[name] = BankAccount(name, balance)
        print("Account created successfully!")
        
    elif choice == 2:
        name = input("Enter account holder name: ")
        if name in accounts:
            amount = float(input("Enter deposit amount: "))
            accounts[name].deposit(amount)
        else:
            print("Account not found!")
            
    elif choice == 3:
        name = input("Enter account holder name: ")
        if name in accounts:
            amount = float(input("Enter withdrawal amount: "))
            accounts[name].withdraw(amount)
        else:
            print("Account not found!")
            
    elif choice == 4:
        name = input("Enter account holder name: ")
        if name in accounts:
            accounts[name].display()
        else:
            print("Account not found!")
        
    elif choice == 5:
        break
        
    else:
        print("Invalid choice!")

当运行此程序时，它将显示一个菜单，用户可以选择创建账户、存款、取款、查询账户信息或退出程序。程序将使用字典来保存所有账户，并通过 BankAccount 类来管理每个账户的余额。