python - Dynamically generate one value in a Django include tag -

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i have include tag works fine if hard code values, need generate on fly using {{ foo_counter }}. doing way: 

{% include "template.html" foo=var1 pos="var_num_{{foo_counter.next}}" bool="0" %}

just outputs string without interpreting variable (as expect). i've tried combinations of tag around either template error or same output.

you can use django's inbuilt add filter: https://docs.djangoproject.com/en/1.8/ref/templates/builtins/#add

{% include "template.html" foo=var1 pos="var_num_"|add:foo_counter.next bool="0" %}


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