Noughts and Crosses: Oxford Modern Playscripts

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If __computer_move_genius finds a win path it wishes to use for its next move it calls this function to find an empty square in this path. If there are two the first is returned.

Oxford Playscripts: Noughts and Crosses - Oxford University Press

That's the NaC class finished so now we can move on to writing a UI. As I mentioned above I have written a console UI with curses but the NaC class has no user interface code so can be used with any library or framework, for example PyGame, Tkinter, PyQt or whatever. Consolidate all the above functions together to create the game. Start with whileloop, which creates an infinite loop, the code keeps on executing as long as a given boolean condition evaluates to true. Set up the board, assign player1_markerand player2_markeras player_input()where the players decide their markers and assign first_move()as turn that decides which player will go first. Initiate the game taking input from the player. If ready to play, enter Yes or No. If the player enters yes, then the game starts. Players are asked which position they want to mark so on and so forth. Once the game is finished, option is offered whether they want to replay or not. while True: If it is starting the game the computer will always select the centre square. Otherwise it uses a list of win paths which I'll describe in a moment to find the optimum square. The stages it goes through are: I have been learning Python for a while now. As one of my first mini-projects I designed a simple tic-tac-toe game. It is a common 2-player game where one player plays crosses (X) and the other plays naughts(O), each player taking turns to play. The player who gets three marks on the board in a row, column, or diagonally, wins. In case neither of the players is able to get this, the game then ends in a draw. The steps to create this game on Python using some of the basic functions are described in the succeeding steps. Step 1: Grid Board Design Start making the tic-tac-toe grid by defining display_board()function, which will display it in a grid format when printed def display_board(board):

This is a fiddly but straightforward function which draws the nine empty squares and also a panel at the bottom listing the valid characters for user input. __show_level

Noughts and Crosses: Oxford Modern Playscripts : Cooke Noughts and Crosses: Oxford Modern Playscripts : Cooke

This is one of the functions passed to the NaC class's __init__, and is called by the NaC class when either the computer or the user make a move. It therefore just needs to draw an "X" or "O" in the correct square. on_game_over For placing the marker on a given position, define a function handle_turn() in which pass 3 parameters; board, marker and position. In this board would be the tic-tac-toe grid. Marker would be X and O. Position would be the spot where the marker would be placed on the board. Equate marker to the position on the board. For this make a function for game to restart. Define replay() function, which will take input from the player to play again or not. def replay():

The on_change and on_game_over arguments are functions injected by the code instantiating an object, and are called when the respective situations occur. We'll see the UI use these later on. Not essential as I could just use arbitrary numbers or strings but it does make the code neater. __init__ This is the other function passed to the NaC class and is called when the game is over. The winner argument is "X" for the player, "O" for the computer or " " for a draw. The function uses this to create a suitable message which is then displayed in an orange box in the middle of the board.