On Thu, Apr 16, 2015 at 9:10 AM, Peter Cock <p.j.a.c...@googlemail.com> wrote:
> On Thu, Apr 16, 2015 at 1:59 PM, Christian Brenninkmeijer
> <christian.brenninkmei...@manchester.ac.uk> wrote:
>> Hi,
>>     I am a new galaxy developer playing with writing my first plugins
>>
>> In my plugin xml configaration file:
>> I want to be able to increase the value of one parameter based on another
>> using
>>
>>   <command interpreter="python">
>>     #if $rows.option =="header_ignore"
>>         #set $data_start = $rows.ignore + 1
>>
>> but I get:
>> unsupported operand type(s) for +: 'InputValueWrapper' and 'int'
>>
>> A hack workaround I found was:
>>     #set $data_start = int(str($rows.ignore)) + 1
>>
>> I just wondered if there was a cleaner way to get the integer value from a
>> InputValueWrapper object.
>
> That is exactly what I would have tried.
>
> Probably with a little work on Galaxy we could get int($rows.ignore)
> to work too by defining an __int__ method on the InputValueWrapper
> class (see file lib/galaxy/tools/wrappers.py for details), but that would
> not work on older Galaxy installations which may or may not bother
> you?

Good idea Peter - I have opened a pull request here with this functionality:

https://github.com/galaxyproject/galaxy/pull/121

Christian - sorry I don't have a more clever workaround for this hack
in the meantime.

-John

>
> Design wise, it would be nice if these wrapper classes offered
> more Python base object behaviour directly, but that is a design
> choice worth wider discussion?
>
>>
>> Which is set to integer by:
>> <param name="ignore" size="4" type="integer" value="1" ....
>>
>> If documentation exist somwere please send me an RTFM link.
>> (I didn't find it in
>> https://wiki.galaxyproject.org/Admin/Tools/ToolConfigSyntax)
>>
>> Thanks in advance
>> Christian Brenninkmeijer
>> University of Manchester
>>
>> Ps. If you want to see exactly what I am playing with see
>> https://github.com/Christian-B/galaxy_tools/tree/master/summary
>> (Note that is subject to change as I learn)
>
> Regards,
>
> Peter
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