Mac Address Lookup

I was in a situation where I was trying to decode mac addresses to the vendor for a project I was working on. I found an online api that would do this, but that requires me to send my Mac Address to someone else, and I would HAVE to be online to run this tool. I was looking for something that could run offline and not require a live outbound connection.

#!/usr/bin/env python

from netaddr import EUI, OUI

def hardware_vendor(mac):
     This function will take a mac address
     The pull out the oui and analyze it.
         hw_id = EUI(mac)
         oui = hw_id.oui
         return oui.registration() 
     except NotRegisteredError, err:
         return 'Error="%s"' % err

if __name__ == '__main__':
    print hardware_vendor('<mac address>')

After running this I could then get the output of the vendor. if I was going to write this in a standalone script I would consider taking the mac address in as a command line argument.