Check if a list of lists (A x A) is a "magic square", in other words, if the sum of all values in all rows, columns and diagonals has the same value

QMagico.py

def validaQMagico(QMagico):
	if len(QMagico) == 0 or len(QMagico) != len(QMagico[0]): return False
	linhasOK = not sum([ True if sum(linha) != sum(QMagico[0]) else False for linha in QMagico ])
	colunasOK = not sum([ sum([ linha[i] for linha in QMagico ]) != sum(QMagico[0]) for i in range(len(QMagico[0])) ])
	diagonaisOK = True
	for i in range(len(QMagico[0])):
		if (sum( [linha[i] for linha in QMagico] )!=sum(QMagico[0])): diagonaisOK = False
		i+=1

	return linhasOK and colunasOK and diagonaisOK

QMagico = [ [2, 7, 6], [9, 5, 1], [4, 3, 8] ]
print(QMagico, validaQMagico(QMagico))