Snippet para agregar un textarea para importar objetos con Django

import_snippet.html

{% extends "admin/change_list.html" %}
{% load adminmedia admin_list i18n %}
{% load url from future %}

{% block content %}
	{{ block.super }}
  <div>
  	<form action="/importar/" method="post">
  		 {% csrf_token %}
		<h1 style="margin-top: 1em;">Importar</h1>
		<textarea  name="import_json" rows="10" cols="100"></textarea> <br>
		<input type="submit" value="Importar">
	</form>
  </div>
{% endblock %}