import random
def draw_board(board):
print(" | |")
print(" " + board[7] + " | " + board[8] + " | " + board[9])
print(" | |")
print("-----------")
print(" | |")
print(" " + board[4] + " | " + board[5] + " | " + board[6])
print(" | |")
print("-----------")
print(" | |")
print(" " + board[1] + " | " + board[2] + " | " + board[3])
print(" | |")
def input_player_letter():
letter = ''
while not (letter == 'X' or letter == 'O'):
print('Do you want to be X or O?')
letter = input().upper()
if letter == 'X':
return ['X', 'O']
else:
return ['O', 'X']
def who_goes_first():
if random.randint(0, 1) == 0:
return 'computer'
else:
return 'player'
def make_move(board, letter, move):
board[move] = letter
def is_winner(bo, le):
return ((bo[7] == le and bo[8] == le and bo[9] == le) or
(bo[4] == le and bo[5] == le and bo[6] == le) or
(bo[1] == le and bo[2] == le and bo[3] == le) or
(bo[7] == le and bo[4] == le and bo[1] == le) or
(bo[8] == le and bo[5] == le and bo[2] == le) or
(bo[9] == le and bo[6] == le and bo[3] == le) or
(bo[7] == le and bo[5] == le and bo[3] == le) or
(bo[9] == le and bo[5] == le and bo[1] == le))
def get_board_copy(board):
dupe_board = []
for i in board:
dupe_board.append(i)
return dupe_board
def is_space_free(board, move):
return board[move] == ' '
def get_player_move(board):
move = ''
while move not in '1 2 3 4 5 6 7 8 9'.split() or not is_space_free(board, int(move)):
print('What is your next move? (1-9)')
move = input()
return int(move)
def choose_random_move_from_list(board, moves_list):
possible_moves = []
for i in moves_list:
if is_space_free(board, i):
possible_moves.append(i)
if len(possible_moves) != 0:
return random.choice(possible_moves)
else:
return None
def get_computer_move(board, computer_letter):
if computer_letter == 'X':
player_letter = 'O'
else:
player_letter = 'X'
for i in range(1, 10):
copy = get_board_copy(board)
if is_space_free(copy, i):
make_move(copy, computer_letter, i)
if is_winner(copy, computer_letter):
return i
for i in range(1, 10):
copy = get_board_copy(board)
if is_space_free(copy, i):
make_move(copy, player_letter, i)
if is_winner(copy, player_letter):
return i
move = choose_random_move_from_list(board, [1, 3, 7, 9])
if move != None:
return move
if is_space_free(board, 5):
return 5
return choose_random_move_from_list(board, [2, 4, 6, 8])
def is_board_full(board):
for i in range(1, 10):
if is_space_free(board, i):
return False
return True
print('Welcome to Tic Tac Toe!')
while True:
the_board = [' '] * 10
player_letter, computer_letter = input_player_letter()
turn = who_goes_first()
print('The ' + turn + ' will go first.')
game_is_playing = True
while game_is_playing:
if turn == 'player':
draw_board(the_board)
move = get_player_move(the_board)
make_move(the_board, player_letter, move)
if is_winner(the_board, player_letter):
draw_board(the_board)
print('Hooray! You have won the game!')
game_is_playing = False
else:
if is_board_full(the_board):
draw_board(the_board)
print('The game is a tie!')
break
else:
turn = 'computer'
else:
move = get_computer_move(the_board, computer_letter)
make_move(the_board, computer_letter, move)
if is_winner(the_board, computer_letter):
draw_board(the_board)
print('The computer has beaten you! You lose.')
game_is_playing = False
else:
if is_board_full(the_board):
draw_board(the_board)
print('The game is a tie!')
break
else:
turn = 'player'
print('Do you want to play again? (yes or no)')
if not input().lower().startswith('y'):
break
This program allows the player to play the game against a computer. At the start of the game, the player chooses whether they want to be X or O. The computer randomly chooses who will go first. The game continues until the player wins, loses or draws.