List of IP addresses in Python to a list of CIDR

Question

How do I convert a list of IP addresses to a list of CIDRs? Google\'s ipaddr-py library has a method called summarize_address_range(first, last) that converts two IP addres

Answer 1

in python3, we have a buildin module for this: ipaddress.

list_of_ips = ['10.0.0.0', '10.0.0.1', '10.0.0.2', '10.0.0.3', '10.0.0.5']
import ipaddress
nets = [ipaddress.ip_network(_ip) for _ip in list_of_ips]
cidrs = ipaddress.collapse_addresses(nets)
list(cidrs)
Out[6]: [IPv4Network('10.0.0.0/30'), IPv4Network('10.0.0.5/32')]