human
Solve the following python programming problem given the following code:
@ skipIf ((('TEST' not in settings.MERCHANT_SETTINGS.get ('global_iris', { 
    
})) or ('TEST_CARDS' not in settings.MERCHANT_SETTINGS.get ('global_iris', { 
    
}))), 'gateway not configured') 
def test_purchase_with_test_cards(self) : 
    gateway = GlobalIrisGateway () 
    if (not gateway.test_mode) : 
        self.fail ('MERCHANT_TEST_MODE must be true for running tests') 
for card in self._get_test_cards () : 
        received_signals = [] 
        def success(sender, **kwargs) : 
            received_signals.append (kwargs.get ('signal')) 
transaction_was_successful.connect (success) 
        def fail(sender, **kwargs) : 
            received_signals.append (kwargs.get ('signal')) 
transaction_was_unsuccessful.connect (fail) 
        try : 
            gateway.validate_card (self) 
except CardNotSupported : 
            self.assertNotEqual (card.expected_response_code, '00') 
            continue 
response = gateway.purchase (Decimal ('45.00'), card, options = { 
            'order_id' : self.get_order_id (), 
}) 
        actual_rc = response ['response_code'] 
        expected_rc = card.expected_response_code 
        self.assertEqual (actual_rc, expected_rc, ('%s != %s - card %s, message: %s' % (actual_rc, expected_rc, card.number, response ['message']))) 
        if (card.expected_response_code == '00') : 
            self.assertEqual (response ['status'], 'SUCCESS') 
            self.assertEqual (received_signals, [transaction_was_successful]) 
else : 
            self.assertEqual (response ['status'], 'FAILURE') 
            self.assertEqual (received_signals, [transaction_was_unsuccessful]) 

    
    

    Fix the buggy line: gateway.validate_card (self)
assistant
#Here is Python code to fix the buggy line: gateway.

gateway.validate_card (card)