[Zope] Dictionaries in DTML

[Casey Duncan]

"John R. Daily" wrote:
> 
> I'm perplexed by dictionary handling in DTML.
> 
> >From a Python Script, I'm returning a dictionary.
> 
> The Zope Book and other DTML documentation refers to a mapping
> attribute in <dtml-in>, but provides no examples, and I'm afraid I
> can't get anything to work, with or without that attribute.
> 
> I've even stripped out access to the values, and still nothing works.
> 
> I've created a simple Python script ("return_dict"):
> ---
> return { "foo" : "bar", "input" : "output" }
> ---
> 
> And a simple DTML script:
> ---
> <dtml-in expr="return_dict()" mapping>
> foo
> </dtml-in>
> ---
> 
> With or without the mapping attribute, that gives me a KeyError: 0,
> with the problem occuring in DT_In.py, in renderwob().
> 
> What am I doing wrong, and moreover, once I'm doing it right, how do I
> access the values?
> 
> --                                                                   --
> John R. Daily                                        jdaily@progeny.com
> Systems Programmer                                Progeny Linux Systems
>                   Master of the ephemeral epiphany
> 

The mapping option is used with a list of dictionaries. It iterates the
list and pushes the contents of each dictionary on the namespace in
turn.

To iterate a plain dictionary use:

dict.keys()

or
 
dict.items()

-- 
| Casey Duncan
| Kaivo, Inc.
| cduncan@kaivo.com
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