tictactoe.py

import random

class Board(object):

    def __init__(self):
        self.board = [[" "," "," "], [" "," "," "], [" "," "," "]]

    def print_board(self):
        topstr = "      a     b     c"
        linestr = "   +-----+-----+-----+"
        rowstr = "%s  |  %s  |  %s  |  %s  |"

        print topstr
        for i, row in enumerate(self.board):
            print linestr
            print rowstr % (i, self.board[i][0], self.board[i][1], 
                self.board[i][2])
        print linestr

    def set_position(self, position, char):
        # Sort the input string
        # This is so players can enter their row, column in any order
        column = [c.lower() for c in position if c in "abcABC"]
        row =[c for c in position if c in "012"]
        # Was it a valid input?
        if len(column) != 1 or len(row) != 1:
            print "That doesn't seem to be a valid position\n"
            return False
        # Place the marker in the right position
        column, row = column[0], int(row[0])
        if column == "a":
            column = 0
        elif column == "b":
            column = 1
        else:
            column = 2
        # Make sure the space is empty
        if self.board[row][column] != " ":
            print "Sorry that spot is already taken\n"
            return False
        self.board[row][column] = char
        return True

    def look_for_win(self):
        for i in range(len(self.board)):
            # Check each row
            if (self.board[i][0] == self.board[i][1] == self.board[i][2]
                    and self.board[i][0].isalpha()):
                return self.board[i][0]
            # Check each column
            elif (self.board[0][i] == self.board[1][i] == self.board[2][i]
                    and self.board[0][i].isalpha()):
                return self.board[0][i]
        # Check diagonals
        if (self.board[0][0] == self.board[1][1] == self.board[2][2] 
                    and self.board[0][0].isalpha()):
                return self.board[0][0]
        if (self.board[0][2] == self.board[1][1] == self.board[2][0]
                    and self.board[0][2].isalpha()):
                return self.board[0][2]
        return False


class Game(object):

    def __init__(self):
        # Boolean triggers the outer game loop
        self.playing_game = True

    def playing_a_human(self):
        # At the moment, the game will force you to play a human
        print "Would you like to play against another human or the computer?"
        answer = raw_input("Type 'h' for human and 'c' for computer\n")
        if answer.strip().lower() == "h":
            print "You've chosen to play a human!\n"
            return True
        elif answer.strip().lower() == "c":
            print "Playing against the computer is not available yet, sorry!\n"
            return False
        else:
            print "I'm sorry that doesn't seem to be one of the options\n"
            return False

    def get_player_name(self, char):
        name = raw_input("Player %s enter your name\n" % char)
        return (name, char)

    def goes_first(self, player_x, player_o):
        first = random.choice([player_x, player_o])
        print "\n%s will go first" % first[0]
        return first

    def turn(self, player):
        move = raw_input("Player %s make your move!\n" % player[0])
        return move

    def win(self, playing):
        print "Congratilations %s, you won!" % playing[0]
        print "!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
        return True

    def play_again(self):
        answer = raw_input("Would you like to play again? 'y' or 'n'\n")
        if answer.strip().lower() == "y":
            print "Let's play again!"
            return True
        elif answer.strip().lower() == "n":
            print "Ok, goodbye!"
            self.playing_game = False
            return True
        else:
            print "I'm sorry that doesn't seem to be one of the options"
            return False


def tutorial():
    print "Welcome to tictactoe!  Would you like to hear the instructions?"
    answer = raw_input("Type 'y' or 'n' and then press Enter\n")

    if answer.strip().lower() == "y":
        print "This is the board:"
        test_board = Board()
        test_board.print_board()
        print "You can declare a move by typing the name of the row and column"
        print "For example typing, '0a' would place your marker like this:"
        test_board.set_position("x", "0a")
        test_board.print_board()
        print "When you have three marks in a row, you win!\n"
        return True
    elif answer.strip().lower() == "n":
        print "ok!\n"
        return True
    else: 
        print "I'm sorry that doesn't seem to be one of the options\n"
        return False


def run():
    play_instructions = tutorial()
    while not play_instructions:
        play_instructions = tutorial()
    game = Game()
    # The game will keep looping until users choose to quit
    while game.playing_game:
        false_choice = game.playing_a_human()
        while not false_choice:
            false_choice = game.playing_a_human()
        # Sets new player names with every round of the game
        player_x = game.get_player_name("x")
        player_o = game.get_player_name("o")
        board = Board()
        current_player = game.goes_first(player_x, player_o)
        board.print_board()
        winner = board.look_for_win()
        while not winner:
            # Turn loop runs at the same time as testing the integrity
            # of the move, "playing" is a tuple created by get_player_name
            move_placed = board.set_position(game.turn(current_player), current_player[1])
            while not move_placed:
                move_placed = board.set_position(game.turn(current_player), current_player[1])
            board.print_board()
            # Swaps turns
            winner = board.look_for_win()
            if current_player == player_x and not winner:
                current_player = player_o
            elif not winner:
                current_player = player_x
        congratulations = game.win(current_player)
        replay = game.play_again()
        while not replay:
            replay = game.play_again()


if __name__ == "__main__":
    run()