tableau = [['1', '4', '7'], ['2', '5', '8'], ['3', '6', '9'] ]

for ligne in range(len(tableau[0])) :
    print()
    for colonne in range(len(tableau)) :
                   print(tableau[colonne][ligne], end = " ")
'''
1 2 3
4 5 6
7 8 9
'''