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Date: Mon, 27 May 2013 16:13:20 +1000
From: Cameron Simpson <cs@zip.com.au>
To: Vito De Tullio <vito.detullio@gmail.com>
Subject: Re: Short-circuit Logic
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On 27May2013 06:59, Vito De Tullio <vito.detullio@gmail.com> wrote:
| Cameron Simpson wrote:
| >   if s is not None and len(s) > 0:
| >     ... do something with the non-empty string `s` ...
| > 
| > In this example, None is a sentinel value for "no valid string" and
| > calling "len(s)" would raise an exception because None doesn't have
| > a length.
| 
| obviously in this case an `if s: ...` is more than sufficient :P

:P

My fault for picking too similar a test.

Cheers,
-- 
Cameron Simpson <cs@zip.com.au>

Death is life's way of telling you you've been fired.   - R. Geis