Checking if two cube nets are of the same

gistfile1.py

# Sample nets for cubes
net_T   = [(0,0), (0,2), (0,1), (1,1), (2,1),(3,1)]
net_t   = [(1,0), (1,2), (1,1), (0,1), (2,1),(3,1)]

# Another net
good   = [(0,3), (0,5), (0,4), (1,4), (2,4),(3,4)]
deviant = [(0,3), (0,4), (0,5), (1,4), (2,4),(1,3)]

# Grid to layout the net
space = map(lambda x : [0,0,0,0,0,0], xrange(0, 5))

# Check if 2 nets are of the same type
def iso(a, b):
	# Sort the 2d coords
	net1 = sorted(a)
	net2 = sorted(b)

	# If they're not the same length, end
	if len(net1) != len(net2):
		return False

	# Go through both of the nets and differences in the lists
	# of coords. Since they're sorted, we just need to check if each
	# difference is the same.
	for i in xrange(0, len(net1) - 1):
		delta1 = (net1[i][0] - net1[i+1][0], net1[i][1] - net1[i+1][1])
		delta2 = (net2[i][0] - net2[i+1][0], net2[i][1] - net2[i+1][1])

		# If the differences aren't the same, end
		if delta1 != delta2:
			return False

	return True

def map_net(net):
	global space
	for n in net:
		space[n[0]][n[1]] = '1'

def clear():
	global space
	space = map(lambda x : [0,0,0,0,0,0], xrange(0, 5))

def spit():
	global space
	for s in space:
		for k in s:
			print k,
		print

print iso(good, good)       # True
print iso(deviant, deviant) # True
print 
print iso(net_t, net_T)     # False
print iso(good, deviant)    # False
print 
print iso(good, net_T)      # True
print iso(good, net_t)      # False
print iso(deviant, net_T)   # False
print iso(deviant, net_t)   # False