Iterate over all IP addresses in a range..

IPs.py

def get_addr_range(start, end):
    def to_int(ip):
        return sum([int(p) << (24 - (8 * e)) for e, p in enumerate(ip.split("."))])

    def to_ip(val):
        return ".".join(str((val & (0xff << s)) >> s) for s in range(24, -1, -8))

    for addr in xrange(to_int(start), to_int(end) + 1):
        yield to_ip(addr)


for x in get_addr_range('0.0.0.0', '224.4.1.254'):
    print x