The code makes me smile, because it's nasty. This isn't like C4, a tiny but complete C compiler which does error checking on its subset. Instead, this is worse than Sector C, which takes every shortcut and just plain assumes everything in the source is right.

This "Python" just plain assumes for keywords: Any "f" is a "for [x] in range[y]" (exactly that, no other for's). Any "w" is a "while". Any "i" is an "if". Any "d" is a "def". Any "p" is a "print("

Nasty, nasty.

(Also nasty is that the code snippets in the article has more comments than the github copy of the "readable" version. You need the article to understand what's going on.)

This is a just a bit too simple for a "Tiny Python". If somebody is willing to allow a few more K's of bytes, I'd love to see at least lists & dicts here--Lisp can do them!