code: def submit(self):
          
          elm_name = '%s_submit' % self.get_attribute('id')
          try:
              self.click(elm_name)
          except NoSuchElementException:
              super(Form, self).submit()
docs: Try to find element with ID "[FORM_ID]_submit" and click on it. If no
          element doesn't exists it will call default behaviour - submiting of
          form by pressing enter.