Python 错误：view form.formapp.views.contact 未返回 HttpResponse 对象。解决

Question

我是python的新手，我正在使用视图，urls来处理表单...我的项目名称是 Projec1，我的应用程序名称是用户应用程序

这是我的**用户应用程序/视图.py

**

from django.http import HttpResponse
from django.shortcuts import render_to_response
from django.template import RequestContext
from users.form import ContactForm
def contact(request):
    if request.method == "POST":
        contact_form = ContactForm(request.POST)
        if contact_form.is_valid():
            success = True
            username = contact_form.cleaned_data['username']
            password = contact_form.cleaned_data['password']
    else:
        contact_form = ContactForm()
        return render_to_response('contact.html', {'contact_form': contact_form})

这是我的 usersapp/contact.html

{%block title%}
Contact
{%endblock%}
{%block content%}
<h2>Contact</h2>
    <form action ='.' method = 'POST'>
        {{contact_form.as_p}}
        <input type ="Submit" name = "submit" value = "send">  
    </form>
{%endblock%}

这是我的用户应用程序/表单.py

from django import forms
class ContactForm(forms.Form):
    username = forms.CharField()
    password = forms.CharField()

这是我的项目1/网址.py

 from django.conf.urls import patterns, include, url
 from django.conf.urls.defaults import *
 from users.views import login
 from users.views import contact
 urlpatterns = patterns('',
                   ('^contact/$', contact),
                     )

我面临此错误

  TypeError at /
  Error when calling the metaclass bases
  module.__init__() takes at most 2 arguments (3 given)
  Request Method:   GET
  Request URL:  http://127.0.0.1:8000/
  Django Version:   1.4.3
  Exception Type:   TypeError
  Exception Value:  
  Error when calling the metaclass bases
  module.__init__() takes at most 2 arguments (3 given)

我的错误是：

  NameError at /contact
  name 'forms' is not defined
  Request Method:   GET
  Request URL:  http://127.0.0.1:8000/contact
  Django Version:   1.4.3
  Exception Type:   NameError
  Exception Value:  
  name 'forms' is not defined
  Exception Location: C:UsersDocumentsMyProjectsprojec1usersform.py    
  in<module>,line 2
  Python Executable:    C:Python27python.exe

请指导某人，提前谢谢

Answer 1

表单类定义错误，这可能导致该错误：

from django import forms
# Inherit from `forms.Form`, not from `forms`:
class ContactForm(forms.Form):
    username = forms.CharField()
    password = forms.CharField()

视图函数中也存在几个问题：

def contact(request):
    if request.method == "POST":
        contact_form = ContactForm(request.POST)
        # Not `contact_form is valid()`:
        if contact_form.is_valid():
            success = True
            # `cleaned_data` is all lowercase:
            username = contact_form.cleaned_data['username']
            password = contact_form.cleaned_data['password']
    else:
        contact_form = ContactForm()
    # You always want to return a response. Putting the return statement
    # here will fix the error mentioned in the question's title. The 
    # second argument makes `contact_form` available from the template:
    return render_to_response('contact.html', {
        'contact_form': contact_form
    })