def test2(n=2) :
	''' returns a random undirected array '''
	adjacency = numpy.empty((n,n))
	
	for m in range(n) :
		for j in range(n) :
			if m == j :
				adjacency[m,j] = False
			elif m > j :
				value = random.randint(0,1)
				adjacency[m,j] = value
				adjacency[j,m] = value
			else:
				continue	
				
	return adjacency