How to use the ofxparse.AccountType.Investment function in ofxparse

def testReadAccount(self):
        with open_file('tiaacref.ofx') as f:
            ofx = OfxParser.parse(f)
        self.assertTrue(hasattr(ofx, 'account'))
        self.assertTrue(hasattr(ofx.account, 'account_id'))
        self.assertEqual(ofx.account.account_id, '111A1111 22B222 33C333')
        self.assertTrue(hasattr(ofx.account, 'type'))
        self.assertEqual(ofx.account.type, AccountType.Investment)

"""

        description = data.desc if hasattr(data, 'desc') else None
        if data.type == AccountType.Bank:
            return BankAccount(
                institution=institution,
                number=data.account_id,
                routing_number=data.routing_number,
                account_type=data.account_type,
                description=description)
        elif data.type == AccountType.CreditCard:
            return CreditCardAccount(
                institution=institution,
                number=data.account_id,
                description=description)
        elif data.type == AccountType.Investment:
            return BrokerageAccount(
                institution=institution,
                number=data.account_id,
                broker_id=data.brokerid,
                description=description)
        raise ValueError("unknown account type: %s" % data.type)