Trying to find block of bytes that will construct a valid SpyCoin block

find.py

#!/usr/bin/python
import struct
import hashlib
import itertools

def verify_block(hash):
	# Difficulty history:
	# We increased difficulty starting from block 52, have to match "Spy".
	# We increased difficulty starting from block 138, have to match "SpyCoinXoXo".

	#if self.block_num < 52:
	#return hash.startswith("Sp")

	#if self.block_num < 138:
	#  return hash.startswith("Spy")

	return hash.startswith("SpyCoinXoXo")

def block_hash(block):
   step1 = hashlib.md5(block).digest()
   step2 = hashlib.md5(step1).digest()
   return step2

data = bytearray("0253707927c4f79853d74aef754374a86d03627269736f74770053656372657432305c2c020003626973686f7000005365637265743230e6810100036b6179000000000053656372657432301e650100036167656e743939005365637265743230c660010003646f6e706564726f5365637265743230e1af0000036e617461736861005365637265743230197d0000".decode('hex'))

#print len(data)
#print block_hash(data).encode('hex')
for k in range(1,10):
	print 'Testing: ',k
	for i in itertools.product(range(255), repeat=k):
		#print i
		b = data + (''.join(map(chr,i)))
		#print b
		if verify_block(block_hash(b)):
			print 'Found!',i