planetstack/templates/admin/core/slice/change_form.html

{% extends 'admin/change_form.html' %}
{% block extrahead %} 
{{ block.super }} 
<script>
deployment_nodes = [
{% for dn in deployment_nodes %}
   [{{ dn.0 }}, {{ dn.1 }} , "{{ dn.2 }}"],
{% endfor %}
];
</script>
{% endblock %}