right! I have been able !! this is what I wanted. Thanks ¡¡¡
El miércoles, 8 de enero de 2014 10:12:57 UTC+1, Paul Tremberth escribió:
>
> Hi,
> you should be able to do
>
> print item.get('tric', 0)
>
>
> /Paul.
>
> On Wednesday, January 8, 2014 1:49:50 AM UTC+1, Roberto López wrote:
>>
>> I will try to explain the best way:
>>
>> To load a value in loader I use the following code:
>> rLoader.add_value('tric',HTML.xpath('.//table[@class="resultTotal"]/tr/td[6]').re(r'\xa3(\d+\.\d+)'))
>>
>> It´s ok, the code work fine. The values between td tags are loaded in the
>> loader, <td>11.8</td>.
>> Sometimes, between <td> tags there isn't a numeric value, for example two
>> dashes <td>--</td>. In this case, as expected, nothing it's loaded, it's
>> ok.
>> When I try to print item[tric] an error occurs: exceptions.KeyError:
>> 'tric'.
>> However the tric attribute exists in item definition.
>>
>> How can I fix it the right way? I would like print item[tric] and get 0
>> value or null.
>>
>>
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