Tukukkk

I made a simply user vs. computer game on Tic Tac Toe. I used Object Oriented Programming to increase my understanding of this programming paradigm. Can you criticize any design flaws I have in my code?

#!/usr/bin/env python3

# -*- coding: utf-8 -*-

"""

Created on Sat Dec 15 20:56:48 2018



@author: von-vic

"""

import random

from itertools import combinations



class Board(object):



    def __init__(self):

        self.board = {x:None for x in (7,8,9,4,5,6,1,2,3)}



    def display(self):

        """

        Displays tic tac toe board

        """

        d_board = 'nTIC TAC TOE:n'

        for pos, obj in self.board.items():

            if obj == None:

                d_board += '_'

            elif obj == 'X':

                d_board += 'X'

            elif obj == 'O':

                d_board += 'O'



            if pos%3 == 0:

                d_board += 'n'

        print(d_board)



    def getAvailable(self):

        """

        Returns available positions

        """

        available = 

        for pos, obj in self.board.items():

            if obj == None:

                available.append(pos)

        return available



class Tic_Tac_Toe(Board):

    pieces = ['O', 'X']



    def __init__(self):

        super().__init__()

        self.piece = Tic_Tac_Toe.pieces.pop(random.choice([0,1]))

        self.cp_piece = Tic_Tac_Toe.pieces[0]



    def user_setName(self, name):

        self.name = name



    def user_setPiece(self, position):

        """

        Position parameter denoted by a number on the keypad (1-9)

        """

        self.board[position] = self.piece



    def user_getPiece(self):

        return self.piece



    def cp_setPiece(self):

        self.board[random.choice(self.getAvailable())] = self.cp_piece



    def cp_getPiece(self):

        return self.cp_piece



    def checkWin(self, player):

        """

        Checks if move by either the user or computer results in a win

        """

        def at_least_one(A, B):

            for i in A:

                for j in B:

                    if i == j:

                        return True

            return False



        win_patterns = [(1,2,3),(4,5,6),(7,8,9),

                        (1,4,7),(2,5,8),(3,6,9),

                        (3,5,7),(1,5,9)]

        spots = [k for k, v in self.board.items() if v == player]

        spots.sort()

        player_combinations = list(combinations(spots,3))

        if at_least_one(player_combinations, win_patterns) == True:

            return True

        return False



    def checkFullBoard(self):

        if None not in self.board.values():

            self.display()

            print('Draw! Game board full!')

            return True

        return False



#---------



def main():

    # Setup game

    game = Tic_Tac_Toe()

    input('Hello user! Welcome to Tic Tac Toe! Press any key to continue')



    if game.user_getPiece() == 'X':

        print('You are X. You are going first.')

    else:

        print('You are O. You are going second.')

        game.cp_setPiece()



    # Main game loop

    while True:

        game.display()

        position = input('Use the number pad on the lefthand side of your keyboardnto select your position (1-9):')



        try:

            position = int(position)

            if position in range(1,10):

                if position in game.getAvailable():

                    game.user_setPiece(position)        

                else:

                    print('----Please input an available position.')

                    continue

            else:

                print('----Please input a number between 1 and 9.') 



        except ValueError:

            print('----Please input a number.')

            continue



        # FOR USER

        # Check for win

        if game.checkWin(game.user_getPiece()) == True:

            game.display()

            print('Congratulations! You win!')

            break



        # Check for full board

        if game.checkFullBoard() == True:

            break



        # FOR COMPUTER

        game.cp_setPiece()

        # Check for win

        if game.checkWin(game.cp_getPiece()) == True:

            game.display()

            print('Sorry. You lost.')

            break



        # Check for full board

        if game.checkFullBoard() == True:

            break



if __name__ == '__main__':

    main()