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From: Erik <python@lucidity.plus.com>
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Subject: Re: I'm missing something here...
Date: Mon, 11 Jan 2016 23:55:23 +0000
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Xref: csiph.com comp.lang.python:101499

On 11/01/16 23:26, Skip Montanaro wrote:
> If I change the last line of find_problems to call
> prob_dates.update(), the message disappears. Why is pylint (1.4.2 BTW)
> complaining that the prob_dates argument of find_problems is unused
> when I use the |= operator?

Is it complaining about that, or is it because the 'for' loop body might 
be executed zero times?

E.