accounts.py

# The SavingsAccount class represents a
# savings account.
import datetime
ERRORCODE_BASE=-20000
class SavingsAccount:
    
    # The __init__ method accepts arguments for the
    # account number, interest rate, and balance.
    
    def __init__(self):
        self.__account_num = "1234"
        self.__interest_rate = 0.0
        self.__balance = 0.0

    # 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

    def withdraw_funds(self, amount):
        if(self.__balance)>=amount:
            x = self.__balance - amount
            return x
    
        else:
            return ERRORCODE_BASE-1
        
    def deposit_funds(self, amount):
        self.__balance += amount
    
# 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):
        # Call the superclass __init__ method.
        SavingsAccount.__init__(self)

        # Initialize the __maturity_date attribute.
        self.__maturity_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
    
    def renew_automatic(self, new_duration):
        self.__maturity_date=self.__maturity_date+new_duration

    def withdraw_funds(self, amount):
        todays_date = datetime.date.today()
        if todays_date >= self.__maturity_date:
            if(self.__balance)>=amount:
                x = self.__balance - amount
                return x
            else:
                return ERRORCODE_BASE -1
        else:
            return ERRORCODE_BASE -2