Functions outside test

def fill_data_1(self):
    a = self.driver.find_element_by_id('visa')
    a.click()

class SprintTests(unittest.TestCase):
   
    def setUp(self):
       
        self.driver = webdriver.Firefox()
        self.driver.get("http://abcd.html")
        self.driver.implicitly_wait(30)
        self.driver.maximize_window()
       
    def test_Amount_Orderid_CardDetails_checks(self):
            a = self.driver.find_element_by_xpath("/html/body/div/div/a")
        a.click()
        fill_data_1(self)