On Thu, Jun 5, 2008 at 3:35 PM, Tino Wildenhain <tino@wildenhain.de> wrote:
Hi,
Marco Bizzarri wrote: ...
if result: result_len = results.actual_result_count else: result_len = 0
return result_len
...
Thanks for your answer, but there is something I do not understand:
if results:
an empty result from ZCatlog is false in a boolen condition?
Yes, thats standard Python behavior, empty lists, dictionaries and similar objects are assumed "False" when used as boolean.
This means you could even write it this way:
return (results and results.actual_result_count) or 0
in python2.5 (not yet supported by Zope) even:
return results.actual_result_count if results else 0
Cheers Tino
Tino, Janko, thanks for the clarification. I understand the standard behaviour of list and tuples. But what a Catalog returns is not (if I understand it correctly) a list or a tuple, even though it presents as such. It is a subclass of Lazy. Is Lazy behaving like a list or a tuple, in this respect? Regards Marco -- Marco Bizzarri http://iliveinpisa.blogspot.com/