view.py：
class UserForm(forms.Form):
username = forms.CharField(label='用户名',max_length=100)
password = forms.CharField(label='密__码',widget=forms.PasswordInput())
html页面：
<div class="form-group has-feedback">
<input type="email" class="form-control" placeholder="Email">
<span class="glyphicon glyphicon-envelope form-control-feedback"></span>
</div>
<div class="form-group has-feedback">
<input type="password" class="form-control" placeholder="Password">
<span class="glyphicon glyphicon-lock form-control-feedback"></span>
</div>
实现登陆功能的时候，两个input是分别在两个div中的。

类似以下代码：
fav_id = request.POST.get("fav_id", 0)
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中间代码省略........
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fail = {'status': 'fail', 'msg': '用户未登录'}
return HttpResponse(json.dumps(fail), content_type='application/json')
但不知道是否在你的程序有效。