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

[Ian Kelly]

On Mar 30, 2014 9:26 AM, "Steven D'Aprano" <
steve+comp.lang.python at pearwood.info> wrote:
>
> On Sat, 29 Mar 2014 03:21:29 -0500, Mark H Harris wrote:
> > from a computer historical standpoint too. I mean, think
> > about it, computers have only existed since late 1940s and only in their
> > modern context since about 1989. I didn't really start using unicode
> > until about 5 years ago; python has only really used it since python3.
> > right?
>
> No. Python 2.2 introduced Unicode.

Python 2.0 if the PEP 100 metadata is accurate.
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