Explanation of this Python language feature? [x for x in x for x in x] (to flatten a nested list)

[Marko Rauhamaa]

Mark H Harris <harrismh777 at gmail.com>:

> So, python(3)'s use of unicode is exciting, not only as a step forward
> for the python interpreter, but also as a leadership step forward in
> computer science around the world.

Big words. I don't think computer science has experienced major steps
forward since the 1930's: combinatory logic, the Turing machine, the
Entscheidungsproblem, the halting problem,...

The one major latter-day addition is complexity theory (1960's).


Marko