mac_gen.py

#!/usr/bin/python

import random

def mac():
    i=0
    r=[]
    while i<6:
        s="".join([random.choice('0123456789ABCDE'),random.choice('0123456789ABCDE')])
        r.append(s)
        i+=1 
    r[0]="".join([random.choice('0123456789ABCDEF'),random.choice('0123456789ABC')])
    r[1]="00" #not sure who's the vendor for this MAC
    r[2]="01" #not sure who's the vendor for this MAC
    return ":".join(r)

a=input("How many MACs do you need? \n >")
for b in range(a):
    print mac()