In addition to the GP's self deprecating sibling comment, I started using Python around 2.2, before there were even "True" and "False". So, seeing a 'while 1' loop is perfectly natural to me. But, I'm also perfectly comfortable with Python's "truthiness" in more places than most people are.
As a bonus: consider "while 'false' :" as a perfectly valid start to an unbounded loop.
That sort of thing is ubiquitous in dynamically-typed languages. Even HTML: the state of boolean attributes is determined by the attribute being set, regardless of its value, so <input disabled=false> will give you a nice disabled text box. Mind you, some attributes that you might think would be boolean actually aren’t, for varying reasons good and bad, e.g. autocomplete=on|off, aria-hidden=true|false.
http://python-history.blogspot.com/2013/11/the-history-of-bo...