Django import模块：
AbstractUser：from django.contrib.auth.models import AbstractUser
admin：from django.contrib import admin
AppConfig：from django.apps import AppConfig
from django.contrib.auth import authenticate
forms：from django import forms
get_object_or_404：from django.shortcuts import get_object_or_404
get_filter_or_404：from django.shortcuts import get_filter_or_404
HttpResponse：from django.http import HttpResponse
HttpResponseRedirect：from django.http import HttpResponseRedirect
Http404：from django.http import Http404
include：from django.conf.urls import include
login：from django.contrib.auth import login
login_required：from django.contrib.auth.decorators import login_required
logout：from django.contrib.auth import logout
make_password：from django.contrib.auth.hashers import make_password
method_decorator：from django.utils.decorators import method_decorator
models：from django.db import models
Q：from django.db.models import Q
render：from django.shortcuts import render
render_to_response：from django.shortcuts import render_to_response
reverse：from django.urls import reverse
re_path：from django.urls import re_path
path：from django.urls import path
serve：from django.views.static import serve
url：from django.conf.urls import url
View：from django.views.generic.base import View