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template.html

views.py

<!DOCTYPE html>
<html>
<body>

<ul>
  {% for x in cars %}
    <li>{{ x }}:
      <ul>
        {% for y in colors %}
          <li>
            {{ forloop.parentloop.counter }}
            {{ y }}
          </li>
        {% endfor %}
      </ul>
    </li>
  {% endfor %}
</ul>

<p>Check out views.py to see what the cars and colors object look like.</p>

</body>
</html>

from django.http import HttpResponse
from django.template import loader

def testing(request):
  template = loader.get_template('template.html')
  context = {
    'cars': ['Ford', 'Volvo', 'BMW'],
    'colors': ['Red', 'Green', 'Blue']
    }
  return HttpResponse(template.render(context, request))