from Crypto.Cipher import AES

def AES_ECB_decrypt(ctxt, key):
	ptxt = ''
	cipher = AES.new(key, AES.MODE_ECB)

	for block in range(len(ctxt) / AES.block_size):
		start, end = block * AES.block_size, (block+1) * AES.block_size
		ptxt += cipher.decrypt(ctxt[start:end])

	return ptxt