Question

I making MAC addr generator and currently I have this problem.

mac1="001122334455"
mac2="001122334695"

mac1 = [mac1[x:x+2] for x in xrange(0,len(mac1),2)]
mac2 = [mac2[x:x+2] for x in xrange(0,len(mac2),2)]
k=0
for item in mac1:
    mac1[k] = "%d" % int(mac1[k], 16)
    mac2[k] = "%d" % int(mac2[k], 16)
    mac1[k]=int(mac1[k])
    mac2[k]=int(mac2[k])
    k=k+1

while mac1 != mac2:
    #print mac1

    print "%X0:%X:%X:%X:%X:%X" % (mac1[0], mac1[1], mac1[2], mac1[3], mac1[4], mac1[5])
    mac1[5] = int(mac1[5]) + 1
    if int(mac1[5]) > 255:
        #mac1[5] = 00
        mac1[4] = int(mac1[4]) +1
        if int(mac1[4]) > 255:
            mac1[3] = int(mac1[3]) + 1
            if int(mac1[3]) > 255:
                mac1[2] = int(mac1[2]) +1
                if int(mac1[2]) > 255:
                    mac1[1] = int(mac1[1]) +1

I need to start generating fifth byte from beginning so I defined mac1[5] = 00, but instead of two 0 I only get one 0?

Answer 1

Much simpler to just treat the entire mac as one number:

mac1 = 0x1122334455
mac2 = 0x1122334695
for i in xrange(mac1, mac2+1):
    s = "%012x" % i
    print ':'.join(s[j:j+2] for j in range(0,12,2)))

See Display number with leading zeros