Django iterate items in template and create new row per N items. In the snippet i create new row per 2 items
<div class="container">
<div class="row">
{% for i in data %}
<div class="col-2">
{{i}}
</div>
{%if forloop.counter|divisibleby:"2" %}
</div><div class="row">
{%endif%}
{%endfor%}
</div> <!--container-->