[ZPT] dictionaries, has_key, and the test function

[Tim Lynch]

no, I didn't try your suggestion. But, y'know what? it works!

thanks Troy


don't know why I was stuck on using test





> did you try
>    <span tal:define="parents python:(results.has_key('parents') and 
> results['parents']) or None">
>      do stuff
>    </span>
> 
> or something like that?
> 
> Troy
> 
> Tim Lynch wrote:
> > I'd like to write something like:
> > 
> > <span tal:define="parents python:test(results.has_key('parents'), results['parents'], None)">
> >   do stuff
> > </span>
> > 
> > 
> > This fails if 'parents' doesn't exist; the line faults & I get
> > a key doesn't exist error.
> > 
> > 
> > 
> > I've worked out an alternative:
> > 
> > <span tal:condition="python:test(results.has_key('parents'), 1, 0)">
> >    <span tal:define="parents python:results['parents']">
> >        do stuff
> >    </span>
> > </span>
> > 
> > 
> > but I figure I'm missing something here and that first approach
> > ought to somehow work.
> > 
> > Anybody have any ideas?
> > 
> > 
> > I'm running 2.60b1 if it makes any difference.
> > 
> > 
> > ---
> > 
> > tlynch@nal.usda.gov
> > 
> > _______________________________________________
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> 
> 
> 
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--
Tim Lynch                            tim.lynch@cornell.edu
Information Technology Section                607.255.9570
Albert R. Mann Library
Cornell University
Ithaca, NY 14853