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template.html

views.py

<!DOCTYPE html>
<html>
<body>

<ul>
  {% for x in mylist %}
    {% ifchanged %}
      <li>{{ x }}</li>
    {% endifchanged %}
  {% endfor %}
</ul>

<p>Check out views.py to see what the mylist 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 = {
    'mylist': [1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 5]
    }
  return HttpResponse(template.render(context, request))