in python:

The ATM program allows a user an indefinite number of attempts to log in. Fix the program so that it displays a message that the police will be called after a user has had three successive failures. The program should also shut down the bank when this happens.

Code to be fixed:

"""

File: atm.py

Project 8.4

This module defines the ATM class and its application.

Modifies the user interface so that it prints a message and shuts down

if the user fails at three consecutive logins.

Can be modified to run as a script after a bank has been saved.

"""

from bank import Bank, SavingsAccount

class ATM(object):

"""This class represents terminal-based ATM transactions."""

def __init__(self, bank):

self._account = None

self._bank = bank

self._methods = {} # Jump table for commands

self._methods["1"] = self._getBalance

self._methods["2"] = self._deposit

self._methods["3"] = self._withdraw

self._methods["4"] = self._quit

def run(self):

"""Logs in users and processes their accounts."""

failureCount = 0

while True:

# Prompt user to enter name

# Prompt user to enter PIN

# Load account

# If account was not found

# Print "Error, unrecognized PIN"

# If account name does not match name

# Print "Error, unrecognized name"

# If account is valid

# Load account menu

# If an invalid entry was made three times

# Print "Shutting down and calling the cops!" and end program

def _processAccount(self):

"""A menu-driven command processor for a user."""

while True:

print("1 View your balance")

print("2 Make a deposit")

print("3 Make a withdrawal")

print("4 Quit ")

number = input("Enter a number: ")

theMethod = self._methods.get(number, None)

if theMethod == None:

print("Unrecognized number")

else:

theMethod()

if self._account == None:

break

def _getBalance(self):

print("Your balance is $", self._account.getBalance())

def _deposit(self):

amount = float(input("Enter the amount to deposit: "))

self._account.deposit(amount)

def _withdraw(self):

amount = float(input("Enter the amount to withdraw: "))

message = self._account.withdraw(amount)

if message:

print(message)

def _quit(self):

self._bank.save()

self._account = None

print("Have a nice day!")

# Top-level functions

def main():

"""Instantiate an ATM and run it."""

bank = Bank("bank.dat")

atm = ATM(bank)

atm.run()

def createBank(number = 0):

"""Saves a bank with the specified number of accounts.

Used during testing."""

bank = Bank()

for i in range(number):

bank.add(SavingsAccount('Name' + str(i + 1),

str(1000 + i),

100.00))

bank.save("bank.dat")

# Creates a bank with the following names / PINS:

# Name1, 1000

# Name2, 1001

# Name3, 1002

# Name4, 1003

# Name5, 1004

createBank(5)

main()