Rar password cracker

import os
import sys
import time
 
# Written by Jelmer de Hen - h.ackack.net
 
def bfcrackrar(wlistlocation,rarfile):
	wlist=open(wlistlocation,"r")
	print "Going to crack "+rarfile+" with wordlist "+wlistlocation
	tries=0
	start=time.time()
	for word in wlist:
		if(word[-1]=="\n"):
			word=word[:-1]
		if word=="":
			word="NULL"
 
		if word[0]=="#":
			print "Passing "+word
			word="NULL"
		if word!="NULL":
			print "Trying "+word
			a=os.popen("unrar t -y -p"+word+" "+rarfile+" 2>&1 | grep 'All OK'")
			tries+=1
			for i in a.readlines():
				if i=="All OK\n":
					print "Found password "+repr(word)
					print "Amount of passwords tried: "+str(tries)
					print "It took: "+str(time.time()-start)+" seconds"
					sys.exit(1)
if(len(sys.argv)==3):
	bfcrackrar(sys.argv[1],sys.argv[2])
else:
	print sys.argv[0]+" wlist rarfile"
	print "Example: "+sys.argv[0]+" /usr/share/john/password.lst test.rar"