This module allows you to get the public suffix of a domain name using the
Public Suffix List from http://publicsuffix.org

A public suffix is one under which Internet users can directly register names.
Some examples of public suffixes are .com, .co.uk and pvt.k12.wy.us. Accurately
knowing the public suffix of a domain is useful when handling web browser
cookies, highlighting the most important part of a domain name in a user
interface or sorting URLs by web site

WWW: https://github.com/nexb/python-publicsuffix2