Brainfuck in one line of Python (opens in new tab)

The goal wasn't "tightly packed" the goal was "one line."

In Python that means, essentially, one expression. That's what makes it a stunt.

Maybe "in one Python statement" would be more appropriate.

It's generally accepted that a semicolon (in most languages) means two lines no matter how the spacing goes. In Python, it's particularly tricky to have a complex program evaluate to one statement because of limitations like no assignments in expressions. It's true, though, that this is basically the same as writing Lisp in Python.

Not in Python.

Lots of people can put things on URLs under princeton.edu, or the domains of most universities. In this case, note the ~username in the URL--this is the personal page of a graduate student. Usually universities do not censor pages of their students. I do agree, though, that it would be surprising to see this on a departmental page or anything else owned by a PR team.

Why? It is the name of the language.

You can only imperfectly emulate anything more than a regular language in a finite reality (since a pushdown automaton has an infinite stack). A PC is just a big DFA.