[Zope] Re: Finding an object in a folder

[Tres Seaver]

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Paul Winkler wrote:
> On Fri, May 27, 2005 at 08:51:58AM +0100, Chris Withers wrote:
> 
>>Paul Winkler wrote:
>>
>>
>>>marker = ()
>>>if getattr(some_object, marker) is not marker:
>>
>>For good measure, I wonder if that should be a [], no a ()?
> 
> 
> What's wrong with a tuple? There's no reason to mutate the marker. 

In Python, there is only empty tuple object,  while each empty list is a
distinct object.  For use as a marker, the empty list can't return a
false positive, while the empty tuple can.

Tres.
- --
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Tres Seaver                                   tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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