Tic-Tac-Toe Game Code in Python

This code defines a basic Tic-Tac-Toe game where two players take turns inputting their moves. It checks for a winner after each move and displays the game board until there is a winner or a tie. To play, simply run the script, and it will prompt players to enter their moves by specifying row and column numbers.

def print_board(board):
    for row in board:
        print(" | ".join(row))
        print("-" * 9)

def check_winner(board, player):
    for row in board:
        if all(cell == player for cell in row):
            return True

    for col in range(3):
        if all(board[row][col] == player for row in range(3)):
            return True

    if all(board[i][i] == player for i in range(3))) or \
       all(board[i][2 - i] == player for i in range(3)):
        return True

    return False

def play_game():
    board = [[" " for _ in range(3)] for _ in range(3)]
    players = ['X', 'O']
    player_index = 0
    game_over = False

    while not game_over:
        print_board(board)
        player = players[player_index]
        print(f"Player {player}'s turn.")
        
        row = int(input("Enter the row (0, 1, 2): "))
        col = int(input("Enter the column (0, 1, 2): "))
        
        if board[row][col] == " ":
            board[row][col] = player
            if check_winner(board, player):
                print_board(board)
                print(f"Player {player} wins!")
                game_over = True
            elif all(cell != " " for row in board for cell in row):
                print_board(board)
                print("It's a tie!")
                game_over = True
            else:
                player_index = (player_index + 1) % 2
        else:
            print("That position is already taken. Try again.")

if __name__ == "__main__":
    play_game()