tkFileDialog question

Matt Mitchell mmitchell at transparent.com
Mon Nov 16 19:30:02 CET 2009




 
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-----Original Message-----
From: python-list-bounces+mmitchell=transparent.com at python.org
[mailto:python-list-bounces+mmitchell=transparent.com at python.org] On
Behalf Of r
Sent: Monday, November 16, 2009 12:16 AM
To: python-list at python.org
Subject: Re: tkFileDialog question

Matt,

There is also a nice thing you need to know about Python if you
already do not know. That is the fact that all empty collections bool
to False. This makes Truth testing easier.

>>> bool([])
False
>>> bool('')
False
>>> bool({})
False
>>> bool([1])
True
>>> bool([[]])
True
>>> bool(' ')
True

any empty collection, string, or 0 always bools to False.
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Thank you both for all the help.  Your suggestions have helped clean up
a bunch of my code.

Thanks!
Matt



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