Malcolm,
Many thanks, I will go with the first option, it is not a great change
to enable this, and I would rather not cross the line on the template side.
Rgds
Trevor
Malcolm Tredinnick wrote:
>On Sat, 2006-09-23 at 00:12 +1000, Woolley wrote:
>
>
>>Hi,
>>
>>I was wondering how to read a sparse martrix in a django template. I can
>>generate the matrix in the view function, but I cannot seem to get the
>>results to come out.
>>
>>Basic assignment/ format below, not how it is really done though, but
>>this is the effective result
>>
>>matrix[(1,0)] = 1
>>matrix[(1,1)] = 2
>>matrix[(1,2)] = 3
>>matrix[(2,0)] = 4
>>matrix[(2,1)] = 5
>>matrix[(2,2)] = 6
>>
>>How would I get the template language to understand this. It seems to
>>tie itself in a knot when I use {{ matrix.(1,0) }}
>>
>>The follow on question to this, is can the first number be a variable,
>>thereby cutting the template size down?
>>
>>eg {{ matrix.({{ order }},0) }}, this particular format does fail though.
>>
>>
>
>Two possibilities I can think of:
>
>(1) Change your data structure slightly so that it is nested sequences:
>
> matrix[1][0] = 1
> matrix[1][1] = 2, etc
>
>Then you can do
>
> {% for row in matrix %}
> {% for element in row %}
> {{ element }}
> {% endfor %} <br>
> {% endfor %}
>
>(2) Using your original data structure, we can fake iterating overs the
>first index and then the second. This is pretty evil and untested, but
>it should be close to correct. Note that this comes pretty close to
>programming in templates (in fact it completely crosses the line), so I
>would suggest the slight change in data structure, above, if at all
>possible.
>
> {% for item in matrix.items|dictsort:"0" %}
> {% ifchanged item.0.0 %}<br>{% endif %}
> {{ item.1 }} <!-- This is the element content -->
> {% endfor %}
>
>Regards,
>Malcolm
>
>
>>
>
>
>
>
>
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