Working with Items, you will notice the API is very similar to the dict
API<http://docs.python.org/library/stdtypes.html#dict>
El miércoles, 8 de enero de 2014 22:26:29 UTC+1, Roberto López escribió:
>
> 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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