command line python tictactoe

tictactoe.py

#! python3
# tictactoe.py - command line tic tac toe game

import random
from itertools import cycle
myIterator = cycle(range(2))

players = ["O", "X"]

game_result = ""

deck = [
	[".",".","."],
	[".",".","."],
	[".",".","."]]

def print_deck(deck):
	print()
	for line in deck:
		for position in line:
			print(position + " ", end = "")
		print()
	print()

def deck_is_full(deck):
	# check if there are remaining empty positions
	period_in_deck = any("." in line for line in deck)
	# if not, return game result
	if not period_in_deck:
		return "Draw: nobody wins..."

def three_in_line(deck, sign):
	# for each line in the deck
	for line in deck:
		# we check if they only contain the sign passed as a parameter
		if "".join(line) == 3 * sign:
			return f"{sign} wins!"

	for col in range(3):
		if deck[0][col] == sign and deck[1][col] == sign and deck[2][col] == sign:
			return f"{sign} wins!"

	if deck[1][1] == sign:
		if deck[0][0] == sign and deck[2][2] == sign:
			return f"{sign} wins!"
		if deck[0][2] == sign and deck[2][0] == sign:
			return f"{sign} wins!"

def game_over(deck):
	if deck_is_full(deck):
		return deck_is_full(deck)
	if three_in_line(deck, "X"):
		return three_in_line(deck, "X")
	if three_in_line(deck, "O"):
		return three_in_line(deck, "O")
	return False

# we randomly choose which player starts
player_to_play = random.choice(players)
# and make sure he's second in the players array
if players[0] == player_to_play:
	players.append(players.pop(0))

print(f"Welcome to TicTacToe! \nPlayer {player_to_play} gets to start!\n")

while not game_over(deck):
	print(f"Player {player_to_play}, please type the position you want to fill:")
	print_deck(deck)
	player_input = input()
	# put player sign at player inputed deck position
	deck[int(player_input[0])][int(player_input[1])]= player_to_play
	
	# use itertools.cycle() to cycle to next player
	# (1st iteration is 0, 2nd is 1, etc.)
	player_to_play = players[next(myIterator)]
	print()

print(20 * "*")
print_deck(deck)
print(game_over(deck))