def login(request):
    errors = {}
    if request.method == "POST":
        username = request.POST.get("username")
        password = request.POST.get("password")
        user = authenticate(username=username,password=password)
        print("auth res",user)
        if user:
            print("authenticate success")
            return redirect("/")
        else:
            errors = {"error":"用户名或者密码错误"}
    return render(request,\'login.html\',errors)
 
URL
url(r\'^login$\', views.login,name="login"),
 
HTML
{% extends \'base.html\' %}
 
{% block body %}
    <div class="container">
        <div class="col-lg-3 col-lg-offset-4">
            <form class="form-signin" method="POST">
                <h2 class="form-signin-heading">抽屉热门社区</h2>
                <label for="inputEmail" class="sr-only">用户名</label>
                <input type="text" name="username" id="inputEmail" class="form-control" placeholder="username" required autofocus>
                <label for="inputPassword" class="sr-only">Password</label>
                <input type="password" name="password" id="inputPassword" class="form-control" placeholder="Password" required>
 
                <span style="color: red;">{{ error }}</span>
                <div class="checkbox">
                  <label>
                    <input type="checkbox" value="remember-me"> Remember me
                  </label>
                </div>
                <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
            </form>
        </div>
 
    </div>
{% endblock %}