python - Chameleon template engine: loop with index -

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i practicing chameleon template engine bootstrap. layout using fluid layout.

in listing part of layout, using structure like

<div class="row-fluid">     <div class="span4">******</div>     <div class="span4">******</div>     <div class="span4">******</div> </div> <div class="row-fluid">     <div class="span4">******</div>     <div class="span4">******</div>     <div class="span4">******</div> </div>

each row-fluid div contains 3 span4 div.

tal:repeat in chameleon repeats elements in list. if have 6 element in list, generates

<div class="row-fluid">     <div class="span4">******</div>     <div class="span4">******</div>     <div class="span4">******</div>     <div class="span4">******</div>     <div class="span4">******</div>     <div class="span4">******</div>     <div class="span4">******</div> </div>

however, ruins previous layout.

is there anyway task chameleon?

the problem boils down splitting list evenly-sized chunks , using 2 nested loops iterate on "master" list , "sublists".

completely untested, think following starting point:

<div class="row-fluid" tal:repeat="chunk [l[i*3:(i*3)+3] in range((len(l) // 3) + 1) ]">     <div class="span4" tal:repeat="item chunk"><tal:item replace="item" /></div> </div>

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