sdf

sum_d = lambda l: True if sum([l[x][x] for x in range(len(l))]) == sum([[l][x][len(l)-x-1] for x in range(len(l))]) else False
sum_g = lambda l: True if len([sum(x) if sum(x) == sum(l[0])  for x in l]) == len(l) else False
sum_v = lambda l: True if len(set([sum([l[x][y] for x in range(len(l))]) for y in range len(l)])) == 1 else False
l = [] # Тут список
print( True if sum_d(l) == sum_g(l) and sum_g(l)== sum_v(l) else False)