Code for How to Build a Tic Tac Toe Game in Python Tutorial

tictactoe.py

import pygame from pygame.locals import * pygame.init() pygame.font.init() window_size = (450, 500) screen = pygame.display.set_mode(window_size) pygame.display.set_caption("Tic Tac Toe") class TicTacToe():	def __init__(self, table_size):	self.table_size = table_size	self.cell_size = table_size // 3	self.table_space = 20	self.player = "X"	self.winner = None	self.taking_move = True	self.running = True	self.table = []	for col in range(3):	self.table.append([])	for row in range(3):	self.table[col].append("-")	self.background_color = (255, 174, 66)	self.table_color = (50, 50, 50)	self.line_color = (190, 0, 10)	self.instructions_color = (17, 53, 165)	self.game_over_bg_color = (47, 98, 162)	self.game_over_color = (255, 179, 1)	self.font = pygame.font.SysFont("Courier New", 35)	self.FPS = pygame.time.Clock()	# draws table representation	def _draw_table(self):	tb_space_point = (self.table_space, self.table_size - self.table_space)	cell_space_point = (self.cell_size, self.cell_size * 2)	r1 = pygame.draw.line(screen, self.table_color, [tb_space_point[0], cell_space_point[0]], [tb_space_point[1], cell_space_point[0]], 8)	c1 = pygame.draw.line(screen, self.table_color, [cell_space_point[0], tb_space_point[0]], [cell_space_point[0], tb_space_point[1]], 8)	r2 = pygame.draw.line(screen, self.table_color, [tb_space_point[0], cell_space_point[1]], [tb_space_point[1], cell_space_point[1]], 8)	c2 = pygame.draw.line(screen, self.table_color, [cell_space_point[1], tb_space_point[0]], [cell_space_point[1], tb_space_point[1]], 8)	def _change_player(self):	self.player = "O" if self.player == "X" else "X"	# processing clicks to move	def _move(self, pos):	try:	x, y = pos[0] // self.cell_size, pos[1] // self.cell_size	if self.table[x][y] == "-":	self.table[x][y] = self.player	self._draw_char(x,y,self.player)	self._game_check()	self._change_player()	except:	print("Click inside the table only")	# draws character of the recent player to the selected table cell	def _draw_char(self, x, y, player):	if self.player == "O":	img = pygame.image.load("images/Tc-O.png")	elif self.player == "X":	img = pygame.image.load("images/Tc-X.png")	img = pygame.transform.scale(img, (self.cell_size, self.cell_size))	screen.blit(img, (x * self.cell_size, y * self.cell_size, self.cell_size, self.cell_size))	# instructions and game-state messages	def _message(self):	if self.winner is not None:	screen.fill(self.game_over_bg_color, (130, 445, 193, 35))	msg = self.font.render(f'{self.winner} WINS!!', True, self.game_over_color)	screen.blit(msg,(144,445))	elif not self.taking_move:	screen.fill(self.game_over_bg_color, (130, 445, 193, 35))	instructions = self.font.render('DRAW!!', True, self.game_over_color)	screen.blit(instructions,(165,445))	else:	screen.fill(self.background_color, (135, 445, 188, 35))	instructions = self.font.render(f'{self.player} to move', True, self.instructions_color)	screen.blit(instructions,(135,445))	def _game_check(self):	# vertical check	for x_index, col in enumerate(self.table):	win = True	pattern_list = []	for y_index, content in enumerate(col):	if content != self.player:	win = False	break	else:	pattern_list.append((x_index, y_index))	if win == True:	self._pattern_strike(pattern_list[0],pattern_list[-1],"ver")	self.winner = self.player	self.taking_move = False	break	# horizontal check	for row in range(len(self.table)):	win = True	pattern_list = []	for col in range(len(self.table)):	if self.table[col][row] != self.player:	win = False	break	else:	pattern_list.append((col, row))	if win == True:	self._pattern_strike(pattern_list[0],pattern_list[-1],"hor")	self.winner = self.player	self.taking_move = False	break	# left diagonal check	for index, row in enumerate(self.table):	win = True	if row[index] != self.player:	win = False	break	if win == True:	self._pattern_strike((0,0),(2,2),"left-diag")	self.winner = self.player	self.taking_move = False	# right diagonal check	for index, row in enumerate(self.table[::-1]):	win = True	if row[index] != self.player:	win = False	break	if win == True:	self._pattern_strike((2,0),(0,2),"right-diag")	self.winner = self.player	self.taking_move = False	# blank table cells check	blank_cells = 0	for row in self.table:	for cell in row:	if cell == "-":	blank_cells += 1	if blank_cells == 0:	self.taking_move = False	# strikes a line to winning patterns if already has	def _pattern_strike(self, start_point, end_point, line_type):	# gets the middle value of the cell	mid_val = self.cell_size // 2	# for the vertical winning pattern	if line_type == "ver":	start_x, start_y = start_point[0] * self.cell_size + mid_val, self.table_space	end_x, end_y = end_point[0] * self.cell_size + mid_val, self.table_size - self.table_space	# for the horizontal winning pattern	elif line_type == "hor":	start_x, start_y = self.table_space, start_point[-1] * self.cell_size + mid_val	end_x, end_y = self.table_size - self.table_space, end_point[-1] * self.cell_size + mid_val	# for the diagonal winning pattern from top-left to bottom right	elif line_type == "left-diag":	start_x, start_y = self.table_space, self.table_space	end_x, end_y = self.table_size - self.table_space, self.table_size - self.table_space	# for the diagonal winning pattern from top-right to bottom-left	elif line_type == "right-diag":	start_x, start_y = self.table_size - self.table_space, self.table_space	end_x, end_y = self.table_space, self.table_size - self.table_space	# draws the line strike	line_strike = pygame.draw.line(screen, self.line_color, [start_x, start_y], [end_x, end_y], 8)	def main(self):	screen.fill(self.background_color)	self._draw_table()	while self.running:	self._message()	for self.event in pygame.event.get():	if self.event.type == pygame.QUIT:	self.running = False	if self.event.type == pygame.MOUSEBUTTONDOWN:	if self.taking_move:	self._move(self.event.pos)	pygame.display.flip()	self.FPS.tick(60) if __name__ == "__main__":	g = TicTacToe(window_size[0])	g.main()