tictactoe.py

playerOne = ""
playerTwo = ""

def choosePlayer( player ):
    var = raw_input("Player "+ player +": choose X or O: ").upper()

    while (var != 'X' and var != 'O'):
        var = raw_input("Player "+ player +": choose X or O: ").upper()
    
    print "you entered", var
    return var


def drawGame(gameMatrix):

    def printIndex(line, column):
        try: 
            value = gameMatrix[line][column]
            return str(value)
        except IndexError:
            return ""

    print( printIndex(0,0) + " | " + printIndex(0,1) + " | " + printIndex(0,2) )
    print( printIndex(1,0) + " | " + printIndex(1,1) + " | " + printIndex(1,2) )
    print( printIndex(2,0) + " | " + printIndex(2,1) + " | " + printIndex(2,2) )


def validateGameEnd(gameMatrix):

        def isLineEqual( gameMatrix ):
            
            for i in range(0, len(gameMatrix) ):
            
                if ( ( gameMatrix[i][0] != "" and gameMatrix[i][1] != "" and gameMatrix[i][2] != "" )  
                    and gameMatrix[i][0] == gameMatrix[i][1] == gameMatrix[i][2] ):
            
                    return True
            
            return False
                
        
        def isColumnEqual( gameMatrix ):
            
            for i in range(0, len(gameMatrix) ):
            
                if ( ( gameMatrix[0][i] != "" and gameMatrix[1][i] != "" and gameMatrix[2][i] != "" )  
                    and gameMatrix[0][i] == gameMatrix[1][i] == gameMatrix[2][i] ):
            
                    return True
            
            return False

        def isDiagonalEqual( gameMatrix ):
            
            for i in range(0, len(gameMatrix) ):
            
                if ( ( gameMatrix[0][0] != "" and gameMatrix[1][1] != "" and gameMatrix[2][2] != "" )  
                    and gameMatrix[0][0] == gameMatrix[1][1] == gameMatrix[2][2] ):
            
                    return True
                
                if ( ( gameMatrix[0][2] != "" and gameMatrix[1][1] != "" and gameMatrix[2][1] != "" )  
                    and gameMatrix[0][2] == gameMatrix[1][1] == gameMatrix[2][1] ):

                    return True

            return False

        return True if isLineEqual( gameMatrix ) is True else True if isColumnEqual( gameMatrix ) else True if isDiagonalEqual( gameMatrix ) else False

def play(playerOne, playerTwo):
    playerOneTurn = True
    gameEnded = False
    gameMatrix = [["","",""],["","",""],["","",""]]

    #Function to read a player's move
    def readPlayerMove( indexType ):

        def validateMove(move):
            try:
                move = int(move)
            except ValueError:
                print("enter a number")
                return -1

            if (move < 0 or move > 2):
                print("Invalid index")
                return -1
            
            return move
        
        move = validateMove( raw_input("Select "+ indexType +": ") )
        return move

    #Game runs here
    while( not gameEnded ):
        
        drawGame(gameMatrix)
        validMove = -1

        while( validMove == -1 ):

            print( "\n Player {} Turn \n".format( "Player One" if playerOneTurn is True else "Player Two" ) )
            row = readPlayerMove("row")
            column = readPlayerMove("column")

            validMove = True if ( row != -1 ) and column != -1 else -1

            if (gameMatrix[row][column] == ""):
                validMove = True
            else:
                validMove = -1

        gameMatrix[row][column] = playerOne if playerOneTurn is True else playerTwo
        
        gameEnded = validateGameEnd(gameMatrix)

        playerOneTurn = not playerOneTurn

    drawGame(gameMatrix)
    print( "End of the game ! {} WIN !!!".format( "Player Two" if playerOneTurn is True else "Player One" ) )

def main():

    playerOne = choosePlayer("One")
    playerTwo = 'X' if playerOne == 'O' else 'O'

    play(playerOne, playerTwo)

main()