tic_tac_toe.py

from os import system

board = [str(i) + " " for i in range(1, 10)]
user = '❌'
win_lines = [
    [0, 1, 2], [0, 3, 6],
    [3, 4, 5], [1, 4, 7],
    [6, 7, 8], [2, 5, 8],
    [2, 4, 6], [0, 4, 8]
]


def show_board():
    print("┌──┬──┬──┐")
    for i in range(3):
        print(f"│{board[i*3]}│{board[i*3+1]}│{board[i*3+2]}│")
        if (i != 2):
            print("├──┼──┼──┤")
    print("└──┴──┴──┘")


def prompt():
    answer = int(input('Position: '))
    while (1 > answer or answer > 9):
        answer = int(input('Try again: '))
    return answer-1


def set_board(index):
    if board[index] != '❌' and board[index] != '⭕':
        board[index] = user
        return True
    return False


def changeTurn(user):
    return '⭕' if user == '❌' else "❌"


def did_win(user, board, win_lines):
    for line in win_lines:
        if board[line[0]]== user and board[line[1]]== user and board[line[2]]== user:
            return True
    return False


turns = 0
while(True):
    system('cls')
    print('Turn: ' + user)
    show_board()
    if turns >= 9:
        print("It's a draw. Both of you suck!")
        break
    if set_board(prompt()):
        if (did_win(user, board, win_lines)):
            system('cls')
            show_board()
            print(user + ' won!')
            break
        user = changeTurn(user)
        turns += 1