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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