Banking Ex Answers

class BankAccount(object):
    name = ""
    balance = 0
    pin = ""

    def payIn(bankAccount, amount):
        bankAccount.balance += amount;

    def withdraw(bankAccount, amount):
        if (bankAccount.balance < amount):
            return False;
        bankAccount.balance -= amount;
        return True;

    def validatePin(bankAccount, pin):
        return bankAccount.pin == pin;

    def updatePin(bankAccount, pin):
        bankAccount.pin = pin;

    # The class "constructor" - It's actually an initializer
    def __init__(self, name, balance, pin):
        self.name = name
        self.balance = balance
        self.pin = pin

    # How we print a string
    def __repr__(self):
        balanceOutput = "$" + str(self.balance);
        pinOutput = "*" * len(self.pin);
        return "name: " + self.name + "\nbalance : " + balanceOutput + "\npin: " + pinOutput;

def make_bank_account(name, balance, pin):
    return BankAccount(name, balance, pin);

def check_pin():
    pin = "";
    while(len(pin) < 4):
        pin = raw_input("Enter your pin: ");
        pinCheck = raw_input("Enter your pin again to validate: ");
        if (pin != pinCheck):
            pin = "";
            print("the entries did not match, please try again");
    return pin;

def banking():
    name = "";
    while(name == ""):
        name = raw_input("Enter your name: ");
    pin = check_pin();
    bankAccount = make_bank_account(name, 0, pin);
    print("You have a bank account!");
    print(bankAccount);

    while(True):
        checkPin = raw_input("enter your pin");
        pinOk = bankAccount.validatePin(checkPin);
        if (pinOk):
            option = input("What do you want to do? 1. pay in money. 2. withdraw money. 3 see your balance. 4. change your pin: ");
            if (option == 1 or option == 2 or option == 3):
                if (option == 1 or option == 2):
                    amount = input("How much?");
                    if (option == 1):
                        bankAccount.payIn(amount);
                    else:
                        success = bankAccount.withdraw(amount);
                        if (not success):
                            print("your withdrawal failed, insufficient funds");
                print("your balance is: " + str(bankAccount.balance));
            if (option == 4):
                bankAccount.updatePin(check_pin());
            else:
                print("invalid option");
        else:
            print ("you did not validate your pin. try again");

if __name__=='__main__':
    banking();