字典更新序列元素＃0具有长度4; 2是必需的

问题描述：

我在这里新和Django世界.. 我试图找到关于这个错误的答案，但我没有找到一个解决我的问题。字典更新序列元素＃0具有长度4; 2是必需的

urls.py

from django.conf.urls import include, url, patterns 
from django.contrib import admin 
from django.conf import settings 
urlpatterns = [ 
    url(r'^menu_direcao/', "academico.views.menu_direcao", name='menu_direçao'), 
    url(r'^menu_direcao/add_prof/', "academico.views.add_prof", name='add_prof'), 
] 

if settings.DEBUG: 
    urlpatterns += patterns('', (r'^media/(?P<path>.*)$', 'django.views.static.serve', {'document_root': settings.MEDIA_ROOT}),)

models.py

from django.db import models 

class AddProfessor(models.Model): 
    nome = models.CharField(max_length=20) 
    sobrenome = models.CharField(max_length=100) 
    nascimento = models.DateField() 
    matricula = models.IntegerField(max_length=20) 
    senha = models.CharField(max_length=20)

forms.py

from django import forms 
from academico.models import AddProfessor 

class FormAddProfessor(forms.ModelForm): 
    class Meta: 
     model = AddProfessor 
     fields = 'nome', 'sobrenome', 'nascimento', 'matricula'

views.py

from django.shortcuts import render_to_response, get_object_or_404 
from django.template import RequestContext 
from academico.models import AddProfessor 
from academico.forms import FormAddProfessor 

def menu(request): 
    return render_to_response("menu_temp.html", context_instance = RequestContext(request)) 

def menu_direcao(request): 
    return render_to_response("menu_direcao.html", context_instance = RequestContext(request)) 

def add_prof(request): 
    if request.method == "POST": 
     form = FormAddProfessor(request.POST, request.FILES) 
     if form.is_valid(): 
      form.save() 
      return render_to_response("salvo.html", {}) 
    else: 
    form = FormAddProfessor() 
    return render_to_response("add_professor.html", {'form', form}, context_instance = RequestContext(request))

模板/ add_prof.html

{% extends 'base.html' %} 

{% block corpo %} 

<form action="" method="POST"> 

    {% csrf_token %} 
    {{ form.as_p }} 

    <button type="submit">Adicionar</button> 
</form> 

{% endblock %}

ERROR：

ValueError at /menu_direcao/add_prof/ 
dictionary update sequence element #0 has length 4; 2 is required 
Request Method: GET 
Request URL: http://127.0.0.1:8000/menu_direcao/add_prof/ 
Django Version: 1.8.5 
Exception Type: ValueError 
Exception Value:  
dictionary update sequence element #0 has length 4; 2 is required 
Exception Location: C:\Python34\lib\site-packages\django\template\context.py in __init__, line 20 
Python Executable: C:\Python34\python.exe 
Python Version: 3.4.2 
Python Path:  
['c:\\Python34\\Scripts\\escola', 
'C:\\WINDOWS\\SYSTEM32\\python34.zip', 
'C:\\Python34\\DLLs', 
'C:\\Python34\\lib', 
'C:\\Python34', 
'C:\\Python34\\lib\\site-packages'] 
Server time: Dom, 18 Out 2015 12:50:21 -0200

TRACEBACK：

Environment: 


Request Method: GET 
Request URL: http://127.0.0.1:8000/menu_direcao/add_prof/ 

Django Version: 1.8.5 
Python Version: 3.4.2 
Installed Applications: 
('django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'academico') 
Installed Middleware: 
('django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware', 
'django.middleware.security.SecurityMiddleware') 


Traceback: 
File "C:\Python34\lib\site-packages\django\core\handlers\base.py" in get_response 
    132.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 
File "c:\Python34\Scripts\escola\academico\views.py" in add_prof 
    49.  context_instance = RequestContext(request)) 
File "C:\Python34\lib\site-packages\django\shortcuts.py" in render_to_response 
    45.    using=using) 
File "C:\Python34\lib\site-packages\django\template\loader.py" in render_to_string 
    115.       template_name, context, context_instance, dirs, dictionary) 
File "C:\Python34\lib\site-packages\django\template\engine.py" in render_to_string 
    220.   with context_instance.push(context): 
File "C:\Python34\lib\site-packages\django\template\context.py" in push 
    55.   return ContextDict(self, *args, **kwargs) 
File "C:\Python34\lib\site-packages\django\template\context.py" in __init__ 
    20.   super(ContextDict, self).__init__(*args, **kwargs) 

Exception Type: ValueError at /menu_direcao/add_prof/ 
Exception Value: dictionary update sequence element #0 has length 4; 2 is required

所以，如果你能帮助我，我会非常有益。

感谢

答

尝试这样的观点：

from django.shortcuts import render 

def add_prof(request): 
    if request.method == "POST": 
     form = FormAddProfessor(request.POST, request.FILES) 
     if form.is_valid(): 
      form.save() 
      return render(request, "salvo.html") 
    else: 
     form = FormAddProfessor() 
     return render(request, "add_professor.html", {'form': form})

字典更新序列元素＃0具有长度4; 2是必需的

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