def focus(self, client):
        self.focused = self.clients.index(client)
an iterator over all the positions of the board.
dataset/ETHPy150Open qtile/qtile/libqtile/layout/xmonad.py/MonadTall.focus--crossover with--dataset/ETHPy150Open pybrain/pybrain/pybrain/rl/environments/twoplayergames/gomoku.py/GomokuGame._iterPos