UTTT - Numpy

import numpy as np

a = np.array(['X', 'X', 'O', '.', 'X', 'O', '.', '.', 'O'])

print(f'grille Tic-Tac-Toe brute: \n {a}')

a = np.reshape(a, (3, 3))

print(f'grille Tic-Tac-Toe à manipuler: \n {a}')

# Diagonale principale
print(f'Diagonale principale: {np.diagonal(a)}')

# Diagonale secondaire
print(f'Diagonale secondaire: {np.diagonal(np.fliplr(a))}')

# colonne 3
print(f'Colonne 3: {a[:, 2]}')