Simple IP Subnet calculator - 1st Subnet

def getSubnetInfo(ipaddr, subnet_mask):
    splitMask = map(int, subnet_mask.split('.'))
    splitIpaddr = map(int, ipaddr.split('.'))

    #Find index of magic octet in splitMask(that isn't = to 255)
    magicOctet = 0
    for octet in splitMask:
        if octet == 255:
            magicOctet = magicOctet + 1
            #Value in this index = 255, so search next index

    increment = 256 - splitMask[magicOctet]
    ipaddrOctet = int(ipaddr.split('.')[magicOctet])

    #Keeping track of variables
    print "Original IP: " + str(ipaddr)
    #print "Magic Octet Index: " + str(magicOctet)
    #print "Magic number: " + str(ipaddrOctet)
    #print "Increments: " + str(increment)
    #==============================================#

    networkID = 0
    while ipaddrOctet > networkID:
        networkID = networkID + increment
    networkID = networkID - increment
    broadcast = (networkID + increment) - 1

    print("Network = {}.{}.{}.{}".format(splitIpaddr[0], splitIpaddr[1], splitIpaddr[2], networkID))
    print("First Valid IP = {}.{}.{}.{}".format(splitIpaddr[0], splitIpaddr[1], splitIpaddr[2], networkID + 1))
    print("Broadcast = {}.{}.{}.{}".format(splitIpaddr[0], splitIpaddr[1], splitIpaddr[2], broadcast))

getSubnetInfo("192.168.123.10", "255.255.255.224")