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Date: Sun, 26 Oct 2014 15:34:42 +1100
Subject: Re: (test) ? a:b
From: Chris Angelico <rosuav@gmail.com>
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Xref: csiph.com comp.lang.python:79703

On Sun, Oct 26, 2014 at 3:15 PM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
> Since the list items exist only to be counted, the actual item used makes no
> difference. You could use any value at all, or even a different value each
> time:
>
>     len([random.random() for line in lines if not line.strip()])
>
> What is your reason for the choice of True as the tally marker? It doesn't
> clarify your intent, or make it more obvious that you're counting the
> number of non-empty lines.

Personally, I'd use the original value. When you're counting
something, it's common to count that thing, rather than some stand-in.

len([line for line in lines if not line.strip()])

But that's no better than anything else. The only significance is that
it feels more like counting a filtered portion of the list.

ChrisA