[Zope] Pass <dtml-var sequence-item> as parameter to External Method

[Tino Wildenhain]

Thomas G. Apostolou schrieb:
> Αρχικό μήνυμα από  Tino Wildenhain <tino at wildenhain.de>:
> 
> 
>>Thomas G. Apostolou schrieb:
>>
>>>I have an External Method "CharSetConv" that get a
>>>String_To_Be_Converted, its encoding and the encoding to convert
>>
>>it
>>
>>>to.
>>>
>>>I call it like this:
>>><dtml-in sequence-item>
>>>        <td><dtml-var expr="CharSetConv(_,
>>
>>'String_To_Be_Converted',
>>
>>>'ISO-8859-7', 'UTF-8')"> </td>
>>>      </dtml-in>
>>>but in the place of 'String_To_Be_Converted' i want to pass
>>
>><dtml-var
>>
>>>sequence-item>, and i can not find the way to do so.
>>>i have tried to write it like:
>>><dtml-in sequence-item>
>>>        <td><dtml-var expr="CharSetConv(_, '<dtml-var
>>
>>sequence-item>',
>>
>>>'ISO-8859-7', 'UTF-8')"> </td>
>>>      </dtml-in>
>>>but does not work
>>>Can anyone help please?
>>
>>Well, DTML sux for a reason ;)
>>
>>but <dtml-in sequence-item> makes no sense unless you have list in
>>list.
>>
>>You dont need an external method to convert between charsets:
>>
>><dtml-var
>>    expr="_['sequence-item'].decode('iso-8859-7').encode('utf-8')" >
>>
>>HTH
>>Tino
> 
> 
> Dear friend thanks alot fro your reply.
> I do have a lists in list
> your sugestion return an error
> 
> Site error This site encountered an error trying to fulfill your
> request. The errors were: 
> Error Type 
> AttributeError 
> Error Value 
> 'NoneType' object has no attribute 'decode' 
> Request made at 
> 2005/10/19 17:17:03.485 GMT+3 
> 
> what is wrong?

Looks like you have a None object among your strings in the list.
If so, you can either do:

<dtml-if sequence-item> <dtml-var> 
expr="_['sequence-item'].decode('iso-8859-7').encode('utf-8')" >
</dtml-if>

which is the quick & dirty variant, or:
<dtml-var expr="(_['sequence-item'] or 
"").decode('iso-8859-7').encode('utf-8')" >

Which uses a "boolean trick".

HTH
Tino

PS: get used to python scripts where this is a lot better
to write