How to add enctype to form tag?

Question

Django

I study.
Standard django admin panel, I
embed my form with file submission
{% extends "admin/change_form.html" %}
{% block field_sets %}
{{ block.super }}
how to add here (what was generated automatically) without type crutches add an unnecessary field in model ??? Need to completely rewrite the template or is there a standard way... <form method="post" id="post_form" novalidate>
enctype="multipart/form-data"