def _has_fullhouse(self):
        '''
        Check the existence of fullhouse cards
        Returns:
            True: exist
            False: not exist
        '''
        if self.product == 6 or self.product == 9 or self.product == 12:
            return True
        else:
            return False

        Check the existence of fullhouse cards
        Returns:
            True: exist
            False: not exist
        
rlcard/games/limitholdem/utils.py