A class that manages a financial account

bank_account.py

class account:
    def __init__(self, owner, balance):
        self.owner = owner
        self.balance = balance

    def changeCountry(self, newCountry):
        self.owner['country'] = newCountry

    def clientReport(self):
        print('START CR')
        aData = [self.owner['first_name'],
                 self.owner['last_name'],
                 self.owner['address'],
                 self.owner['country'],
                 self.owner['DOB'],
                 self.balance['current_balance'],
                 self.balance['previous_balance'],
                 self.balance['interest_rate']]
        print(len(aData))
        
        report = '''
                    First Name {0}
                    Last Name  {1}
                    Street     {2}
                    Country    {3}
                    DOB        {4}
                    =============
                    Balance    {5}
                    Last Bal   {6}
                    Int. Rate  {7}'''.format(
                        aData[0],aData[1],aData[2],aData[3],aData[4],aData[5],aData[6],aData[7])


        print(report)


BK23 = account({'first_name':'John',
                'last_name':'Smith',
                'address':'122 W. Main Street',
                'state':'WI',
                'country':'United States',
                'SSN':'1103',
                'CStatu':'US Citizen',
                'DOB':'12-30-1976',
                },
               {'current_balance':2343.03,
                'previous_balance':2103.00,
                'interest_rate':0.3,
                'interest_period':'perAnnum'
                })

print(BK23.clientReport())