ACCOUNTS.PY:

class SavingsAccount: # The __init__ method accepts arguments for the # account number, interest rate, and balance. def __init__(self, account_num, int_rate, bal): self.__account_num = account_num self.__interest_rate = int_rate self.__balance = bal

# The following methods are mutators for the # data attributes.

def set_account_num(self, account_num): self.__account_num = account_num

def set_interest_rate(self, int_rate): self.__interest_rate = int_rate

def set_balance(self, bal): self.__balance = bal

# The following methods are accessors for the # data attributes.

def get_account_num(self): return self.__account_num

def get_interest_rate(self): return self.__interest_rate

def get_balance(self): return self.__balance

# The CD account represents a certificate of # deposit (CD) account. It is a subclass of # the SavingsAccount class.

class CD(SavingsAccount):

# The init method accepts arguments for the # account number, interest rate, balance, and # maturity date. def __init__(self, account_num, int_rate, bal, mat_date): # Call the superclass __init__ method. SavingsAccount.__init__(self, account_num, int_rate, bal)

# Initialize the __maturity_date attribute. self.__maturity_date = mat_date

# The set_maturity_date is a mutator for the # __maturity_date attribute.

def set_maturity_date(self, mat_date): self.__maturity_date = mat_date

# The get_maturity_date method is an accessor # for the __maturity_date attribute.

def get_maturity_date(self): return self.__maturity_date

ACCOUNT DEMO.PY:

import accounts

def main(): # Get the account number, interest rate, # and account balance for a savings account. print('Enter the following data for a savings account.') acct_num = input('Account number: ') int_rate = float(input('Interest rate: ')) balance = float(input('Balance: '))

# Create a SavingsAccount object. savings = accounts.SavingsAccount(acct_num, int_rate, \ balance)

# Get the account number, interest rate, # account balance, and maturity date for a CD. print('Enter the following data for a CD.') acct_num = input('Account number: ') int_rate = float(input('Interest rate: ')) balance = float(input('Balance: ')) maturity = input('Maturity date: ')

# Create a CD object. cd = accounts.CD(acct_num, int_rate, balance, maturity)

# Display the data entered. print('Here is the data you entered:') print() print('Savings Account') print('---------------') print('Account number:', savings.get_account_num()) print('Interest rate:', savings.get_interest_rate()) print('Balance: $', \ format(savings.get_balance(), ',.2f'), \ sep='') print() print('CD') print('---------------') print('Account number:', cd.get_account_num()) print('Interest rate:', cd.get_interest_rate()) print('Balance: $', \ format(cd.get_balance(), ',.2f'), \ sep='') print('Maturity date:', cd.get_maturity_date())

# Call the main function. main()

ASSIGNMENT:

Were going to take Programs 11-7 (accounts.py) and 11-8 (account

demo.py) and add to them two additional methods.

Begin by entering

accounts.py

and

account demo.py

Add to

accounts.py

the following two methods:

deposit(

amount), which adds an

amount

to the

balance

in

SavingsAccount

.

withdraw(

amount), which withdraws an

amount

from the

SavingsAccount balance.

Now add TO ACCOUNTS DEMO the following two questions:

After the

SavingsAccount

information and the

CD

information have been entered,

the user is asked the question: Do you want to make a Deposit to your Savings?

If the answer is Y, then the user is asked to type in the amount that is desired to be

deposited. It is here that you will employ your new

deposit()

method.

Next, the user is asked: Do you want to make a Withdrawal from your Savings?

If the answer is Y, then the user is asked to type in the amount that is desired to be

withdrawn.

This amount is withdrawn if and only if the

amount

is less than the current

balance

in

SavingsAccount

. It is here that we will employ your new

withdraw()

method.

Now were going to ask two more questions of the user in

ACCOUNTS DEMP.PY

Now the user is asked the question: Do you want to make a Deposit into your

CD?

If the answer is Y, then the user is asked to type in the amount that is desired to be

deposited. It is here that you will employ your new

deposit()

method once more.

Next, the user is asked: Do you want to make a Withdrawal from your CD?

If the answer is Y, then the user is asked to type in the amount that is desired to be

withdrawn.

This amount is withdrawn if and only if the

amount

is less than the current

balance

in

your

CD

. Again we will employ your new

withdraw()

method.

Note that we do not have to rewrite the two methods that we have made.

Because of Inheritance, your CD object can use these two methods on its own

balance with no further changes being necessary in the module:

accounts.py

.