list iteration if statement

[Steve Holden]

alex goretoy wrote:
> v should have ['3','4','1'] sorry if I made it confusing.
> [...]

Aah, I see I was giving you incorrect advice. I now realise that you
want to flatten the lists as well.

Don't try to do this with a list comprehension. It won't work without
creating an unnecessary list of lists of None.

regards
 Steve
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