如何覆盖和扩展基本的Django管理模板？

{% extends "admin/base.html" %}

{% block title %}My Site{% endblock %}

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

from django import template

register = template.Library()

@register.filter
def custom_filter(value):
    return value.upper()

{% load custom_tags %}

<p>{{ my_value|custom_filter }}</p>

pip install django-grappelli

INSTALLED_APPS = [
    # ...
    'grappelli',
    # ...
]

GRAPPELLI_ADMIN_TITLE = 'My Admin'

python manage.py migrate