`ipaddr.py` is a library for working with IP addresses, both IPv4 and IPv6. It was developed by Google for internal use, and is now open source. Project home page: https://github.com/google/ipaddr-py Please send contributions to ipaddr-py-dev@googlegroups.com. Code should include unit tests and follow the Google Python style guide: https://google.github.io/styleguide/pyguide.html