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From: Ned Batchelder <ned@nedbatchelder.com>
Subject: Re: A curious bit of code...
Date: Thu, 13 Feb 2014 22:26:48 -0500
References: <4cc09129-43ee-4205-a24c-03f92b594abc@googlegroups.com> <839842ff-e0d4-4bec-93fa-b8c25b3ca471@googlegroups.com>
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On 2/13/14 9:45 PM, forman.simon@gmail.com wrote:
> For the record I wasn't worried about the performance.  ;-)
>
> It was for Tkinter event strings not markup tags.
>
> I'm glad this was the time winner!
>
> "key and key[0] == '<' and key[-1] == '>'"
>
>
> Cheers to the folks who did the timings (and saved me from the trouble!)
>
> Last but not least...  s[::len(s)-1]   omg!!?   ;-D
>

If you aren't worried about performance, why are you choosing your code 
based on which is the fastest?  There are other characteristics 
(clarity, flexibility, robustness, ...) that could be more useful.

-- 
Ned Batchelder, http://nedbatchelder.com