The page has been slightly changed since then, but it is still quite outdated. Python 3.6 (2016) has formatted strings, and new/old-style classes thing isn’t relevant at all since Python 3, but wasn’t that much of a deal with Python 2 at the end of its lifetime (~everything was new-style by then).
[1]: Archived in 2006: https://web.archive.org/web/20060925032432/https://www.ruby-...