view视图函数from django.shortcuts import render,redirectfrom django.contrib.auth import authenticate,login,logoutdef acc_login(request):    “登录验证”’    error_msg = ‘‘    if request.method == "POST":        username = request.POST.get(‘username‘)        password = request.POST.get(‘password‘)            user = authenticate(username=username,password=password)        # 用户去做验证        if user:            print("passed authencation",user)            login(request,user)  # 登录可以显示用户            #request.user = user            return  redirect( request.GET.get(‘next‘,‘/‘) )        else:            error_msg = "Wrong username or password!"    return render(request, ‘login.html‘, {‘error_msg‘:error_msg})def acc_logout(request):    #退出    logout(request)    return redirect("/login/")

<div class="container">      <form class="form-signin" method="post">{% csrf_token %}        <h2 class="form-signin-heading">PerfectCRM</h2>        <label for="inputEmail" class="sr-only">Username</label>        <input type="text" id="" name="username" class="form-control" placeholder="Username" required autofocus>        <label for="inputPassword" class="sr-only">Password</label>        <input type="password" name="password" class="form-control" placeholder="Password" required>         <span style="color: red">{{ error_msg }}</span>        <div class="checkbox">          <label>            <input type="checkbox" value="http://www.mamicode.com/remember-me"> Remember me          </label>        </div>        <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>      </form></div> <!-- /container -->