Get your own Django server
mymaster.html
views.py
childtemplate.html
 
<!DOCTYPE html>
<html>
<body>
<h1>Welcome</h1>

{% block userinfo %}
  <h2>Not registered yet</h2>
{% endblock %}

<p>Check out the two templates to see what they look like, and views.py to see the reference to the child template.</p>

</body>
</html>                  
from django.http import HttpResponse
from django.template import loader

def testing(request):
  template = loader.get_template('childtemplate.html')
  return HttpResponse(template.render())
                  
{% extends "mymaster.html" %}

{% block userinfo %}
  <h2>John Doe</h2>
  <p>Explorer of life.</p>
{% endblock %}                  
127.0.0.1:8000/testing