:param player: catan.game.Player
        :param location: string, see hexgrid.location()

def log_player_buys_city(self, player, location):
        """
        :param player: catan.game.Player
        :param location: string, see hexgrid.location()
        """
        self._logln('{0} buys city, builds at {1}'.format(
            player.color,
            location
        ))