报错信息：

view文件，下面login方法：

 def login(request):                                                          
    print request.GET                                                        
#    return render_to_response("login.html")                                 
    user = request.GET["user"]                                               
    passwd = request.GET["passwd"]                                           

    if user == 'python'and passwd == '123':                                   
        return render_to_response("login.html")                              
    else:                                                                    
        return render_to_response("login.html",{'err':"Login failure!!!"})

login.html文件：

 <nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Project name</a>
    </div>
    <div id="navbar" class="navbar-collapse collapse">
      <form class="navbar-form navbar-right" method="get" action="/login/"
        <div class="form-group">
          <input type="text" class="span3" name="user" placeholder="用户名">
        </div>
        <div class="form-group">
          <input type="text" class="span3" name="passwd" placeholder="密码">
        </div>
        <button type="submit" class="btn btn-success">Sign in</button>
            {% if err %}
                {{ err }}
            {% endif %}
      </form>
    </div><!--/.navbar-collapse -->
  </div>
</nav>