Python-сообщество

Checkbox: {{ checkbox }}
{% if loop %}
{% with "template.txt" as filename %}
{% for i in loop %}
        {% with "Off" as checkbox %}
        {% with "" as loop %}
        {% include filename %}
        {% endwith %}
        {% endwith %}
    {% endfor %}
    {% endwith %}
{% endif %}

from django.template import Template, Context, loader

template = loader.get_template('template.txt')
context = Context({"checkbox": "On", "loop": [1, 2, 3]})
print "\n".join([line for line in template.render(context).split('\n') if line.strip()])

Checkbox: On
        Checkbox: Off
        Checkbox: Off
        Checkbox: Off

{% with None as with_select_checkboxes %}
...
{% endwith %}

{% with False as with_select_checkboxes %}
...
{% endwith %}

{% with "" as with_select_checkboxes %}
...
{% endwith %}