def utility(self, state, player):
        "Return the value to player; 1 for win, -1 for loss, 0 otherwise."
        return if_(player == 'X', state.utility, -state.utility)
def utility(self, state, player):
        "Return the value to player; 1 for win, -1 for loss, 0 otherwise."
        return if_(player == 'X', state.utility, -state.utility)
Return the value to player; 1 for win, -1 for loss, 0 otherwise.