django模块

render,redirect
from django.shortcuts import xxx

HttpResponse,HttpResponseRedirect,JsonResponse
from django.http import xxx

CBV中的class aaa(View)
from django.views.generic import View

User用户模块
from django.contrib.auth.models import User
timezone
from django.utils import timezone

邮件模块
from django.core.mail import send_mail

异常，对象不存在(xxx.objects.get(pk=1),如果未获取到可捕获异常)
from django.core.exceptions import ObjectDoesNotExist

引用项目的settings文件，也可以直接引用#from project import settings，耦合较高
此文件可简单理解为指向项目下的settings的快捷方式
from django.conf import settings

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