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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: checking if a list is empty
Date: Fri, 06 May 2011 15:31:57 -0400
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On 5/6/2011 7:34 AM, James Mills wrote:
> On Fri, May 6, 2011 at 4:36 PM, Jabba Laci<jabba.laci@gmail.com>  wrote:
>> If I want to check if a list is empty, which is the more pythonic way?
>
> [...]
>
>> (2) if not li:
>
> This is fine.

This is the intended way. Anything in addition is extra noise and wasted 
calculation. In other words, let Python do the boilerplate work for you.

-- 
Terry Jan Reedy