Crack MD5

This is a little script that I made to crack MD5 password with dictionary.

Code:

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#!/usr/bin/env python
#-*- encoding: iso-8859-1 -*-
###########################################################################
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
############################################################################
# Autor: MrMaX
############################################################################

import md5, sys, getopt
ver= "0.1"
a=0
def run():
       
        if len(sys.argv) == 1 or sys.argv[1]=="-h" or sys.argv[1]=="--help":
                        print "Usage: pymd5 [md5hash] [wordlist]\r\n"
                        print "-h        --help                        This Screen"
                        print "-v        --version                Version"
                       
                        print "Example: ./pymd5.py d79096188b670c2f81b7001f73801117 wordlist.txt"
                        print "\r"
        else:       
                if sys.argv[1]=="-v" or sys.argv[1]=="--version":
                        print "pymd5 version: " + ver + "\nAutor: MrMaX"
       

        if len(sys.argv) == 3:
            md5crack(sys.argv[1],sys.argv[2],)

 
def md5crack(hash,word):
        try:
                wordlist = open(word,"r")
        except IOError:
                print "File " + word + " doesnt exists"
                sys.exit(0)

        global a
       
        for line in wordlist.xreadlines():
                word= line.replace("\n","")
                passw = md5.new(word)

                if (hash == passw.hexdigest()):
                        print '\033[1;32mBINGO: ' + passw.hexdigest() + ' = ' + word+'\033[0'
                       
                        a = 1
                        sys.exit(0)
       
        if ( a == 0):
                print '\033[1;31mSorry no match found\033[0'
        wordlist.close()

def main():
        run()

               
if __name__ == "__main__":
    main()

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Feel free to improve the code, hope that helps