Players will always be set in seat order (1,2,3,4)

def _set_players(self, _players):
        """
        Players will always be set in seat order (1,2,3,4)
        """
        self._players = list()
        _players = list(_players)
        _players.sort(key=lambda p: p.seat)
        for p in _players:
            self._players.append(p)