python manage.py createsuperuser --username hello

from django.contrib import auth

def demo(request):

  print(request.user) # 默认匿名用户对象 AnonymousUser

  print(request.user.id) # None

  print(request.user.username) # ""

  print(request.user.is_active) # False

#authenticate去auth_user查询记录，查询成功返回用户对象，查询失败返回None

user_obj = auth.authenticate(username=hello, password=1234)

# 保存用户状态信息(保存到session中)

auth.login(request, user_obj)

# 退出登录

auth.logout(request)

@login_required(login_url='/login/') #判断ruquest.user中是否有对象,没有跳转到/login/

def index(request):

 return render(request, "index.html", locals())

#修改密码用set_password(密码被加密)

user=User.objects.get(username=request.user.username)

user.set_password(raw_password="")

user.save()

#login_required 这个装饰器

#第二种配置方法settings中添加

LOGIN_URL="/login/"

#判断用户是否登录

     if request.user.is_authenticated:

            print(request.user.is_authenticated)