[Zope] A quick zope/python question

[Andreas Jung]

--On 9. Mai 2006 11:18:25 -0400 Jonathan <dev101 at magma.ca> wrote:

> I have a short python script:
>
> gc = context.restrictedTraverse('coup/temp_folder/GarbageCollector', None)
> print 'gc=',str(gc)
> if gc:
>   print 'GarbageCollector exists'
> else:
>   print 'No GarbageCollector'
>
> which, when run produces:

Check the implementation. "if obj" calls obj.__nonzero__() or 
obj.__len__().. depending on the implemenation this will explain the result


>
> When the script is changed to:
>
> gc = context.restrictedTraverse('coup/temp_folder/GarbageCollector', None)
> print 'gc=',str(gc)
> if gc is not None:
>   print 'GarbageCollector exists'
> else:
>   print 'No GarbageCollector'

This is the right way to do it.

-aj

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