Breakdown CIDR with netaddr

[wfsteadman]

I got it working using this:

from netaddr import *
import sys

network_list = []
subnet_list = []

def define_prefixlens(subnet_input, max):
    max_cidr_val = int(max) + 1
    ip = IPNetwork(subnet_input)
    prefixes = (i for i in range(ip.prefixlen +1, max_cidr_val))
    for i in prefixes:
        network_list.append(i)

def list_of_subnets(subnet):
    ip = IPNetwork(subnet)
    for i in network_list:
        sub = ip.subnet(i)
        for i in sub:
           subnet_list.append(i)

def main():
    # value = sys.argv[1]
    value = '10.20.30.0/27'
    # max_cidr = sys.argv[2]
    max_cidr = 24
    define_prefixlens(value, max_cidr)
    # print(network_list)
    list_of_subnets(value)
    for i in sorted(subnet_list):
        print(i)

if __name__ == '__main__':
    main()