python ATM环路故障

Question

我已经写了这个程序，似乎不知道如何让程序循环回到开始，并再次询问‘选择’选项。

程序运行良好，所有内容都打印到屏幕上，即使是询问您是否想要另一个事务的部分，我如何使它返回呢？

写自动取款机程序。输入帐户余额，打印开始余额。要求存款或提款，根据选择，调用函数执行他们想要的行动，然后打印新的余额。(使用迭代)

def withdraw():
    amt = int(input("What amount to withdraw - multiples of $20: "))
    print('New balance: $', balance - amt)


def deposit():
    amt = int(input("How much are you depositing? "))
    print('New balance: $',balance + amt)

def bal():
    return(balance)


print ("Hello, Welcome to Python ATM.")

balance = float(65.01)

pin = int(input("please enter your account number (Any number:) "))

print('''Current balance: $''',balance)

choice = int(input('''
Please choose an option from the following:
1 - Withdraw
2 - Deposit
3 - Check Balance
4 - Exit:  '''))


if choice == 1:
    print(withdraw());
elif choice == 2:
    print(deposit());
elif choice == 3:
    print(bal());

more = input("Would you like another transaction? (y/n)")

Answer 1

也许您需要一个循环来重复这个选择：

while True:
    print('''Current balance: $''',balance)

    choice = int(input('''
Please choose an option from the following:
1 - Withdraw
2 - Deposit
3 - Check Balance
4 - Exit:  '''))


    if choice == 1:
        print(withdraw());
    elif choice == 2:
        print(deposit());
    elif choice == 3:
        print(bal());


    more = input("Would you like another transaction? (y/n)")
    if more.lower() != 'y':
        print("Goodbay")
        break