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

[Steven D'Aprano]

On Tue, 25 Mar 2014 06:57:19 +1100, Chris Angelico wrote:

> Can you imagine a high level language without a simple notation for
> variable assignment? Certainly not.

I don't know... what a stack based or concatenative language like Forth, 
Postscript, Joy or Factor count as high-level?

I'm pretty sure Joy and Factor should. Perhaps not Forth or Postscript.

Some of these language may offer variable assignment, but using it is 
entirely optional. It's a convenience, nothing more.



-- 
Steven