Python Django用户显示-如何传递用户数据？

我想显示一些登录用户的用户名，django模板将其转换为空。我的代码：

HTML:

---

thx

在视图中添加此代码

args['request'] = request

HTML

欢迎{{request.user.username}

def login_screen(request,template_name):
    username = password = ''
    args={}
    args.update(csrf(request))
    state = "Please log in below..."
    args['state'] = state
    if request.POST:
        username = request.POST.get('username')
        password = request.POST.get('password')
        if not User.objects.filter(username=username).exists():
            user = User.objects.create_user(username=username,email=username,password=password)
        user = authenticate(username=username, password=password)
        if user is not None:
                login(request, user)
                state = "You're successfully logged in!"
                args['state'] = state
                return render_to_response('good_page.html',args)
        else:
            state = "Your username and/or password were incorrect."
    args['state'] = state
    return render_to_response('login_page.html',args)

args['request'] = request

<h3 class="form-title">Welcome {{ request.user.username }}</h3>